$${B_s^0}$$ B s 0 – $${\bar{B}}_s^0$$ B ¯ s 0 mixing within minimal flavor-violating two-Higgs-doublet models

The European Physical Journal C Springer Science and Business Media LLC 75:12 (2015) 594

Authors:

Qin Chang, Pei-Fu Li, Xin-Qiang Li

Observation of a New Charmed Baryon Decaying to Ξc+π-π+

Physical Review Letters American Physical Society (APS) 135:16 (2025) 161901

Authors:

R Aaij, ASW Abdelmotteleb, C Abellan Beteta, F Abudinén, T Ackernley, AA Adefisoye, B Adeva, M Adinolfi, P Adlarson, C Agapopoulou, CA Aidala, Z Ajaltouni, S Akar, K Akiba, P Albicocco, J Albrecht, F Alessio, M Alexander, Z Aliouche, P Alvarez Cartelle, R Amalric, S Amato, JL Amey, Y Amhis, L An, L Anderlini, M Andersson, A Andreianov, P Andreola, M Andreotti, D Andreou, A Anelli, D Ao, F Archilli, M Argenton, S Arguedas Cuendis, A Artamonov, M Artuso, E Aslanides, R Ataíde Da Silva, M Atzeni, B Audurier, D Bacher, I Bachiller Perea, S Bachmann, M Bachmayer, JJ Back, P Baladron Rodriguez, V Balagura, A Balboni, W Baldini, L Balzani, H Bao, J Baptista de Souza Leite, C Barbero Pretel, M Barbetti, IR Barbosa, RJ Barlow, M Barnyakov, S Barsuk, W Barter, J Bartz, JM Basels, S Bashir, B Batsukh, PB Battista, A Bay, A Beck, M Becker, F Bedeschi, IB Bediaga, NA Behling, S Belin, K Belous, I Belov, I Belyaev, G Benane, G Bencivenni, E Ben-Haim, A Berezhnoy, R Bernet, S Bernet Andres, A Bertolin, C Betancourt, F Betti, J Bex, Ia Bezshyiko, O Bezshyyko, J Bhom, MS Bieker, NV Biesuz, P Billoir, A Biolchini, M Birch, FCR Bishop, A Bitadze, A Bizzeti, T Blake, F Blanc, JE Blank, S Blusk, V Bocharnikov, JA Boelhauve, O Boente Garcia, T Boettcher, A Bohare, A Boldyrev, CS Bolognani, R Bolzonella, RB Bonacci, N Bondar, A Bordelius, F Borgato, S Borghi, M Borsato, JT Borsuk, E Bottalico, SA Bouchiba, M Bovill, TJV Bowcock, A Boyer, C Bozzi, JD Brandenburg, A Brea Rodriguez, N Breer, J Brodzicka, A Brossa Gonzalo, J Brown, D Brundu, E Buchanan, L Buonincontri, M Burgos Marcos, AT Burke, C Burr, JS Butter, J Buytaert, W Byczynski, S Cadeddu, H Cai, A Caillet, R Calabrese, S Calderon Ramirez, L Calefice, S Cali, M Calvi, M Calvo Gomez, P Camargo Magalhaes, JI Cambon Bouzas, P Campana, DH Campora Perez, AF Campoverde Quezada, S Capelli, L Capriotti, R Caravaca-Mora, A Carbone, L Carcedo Salgado, R Cardinale, A Cardini, P Carniti, L Carus, A Casais Vidal, R Caspary, G Casse, M Cattaneo, G Cavallero, V Cavallini, S Celani, S Cesare, AJ Chadwick, I Chahrour, H Chang, M Charles, Ph Charpentier, E Chatzianagnostou, M Chefdeville, C Chen, S Chen, Z Chen, A Chernov, S Chernyshenko, X Chiotopoulos, V Chobanova, M Chrzaszcz, A Chubykin, V Chulikov, P Ciambrone, X Cid Vidal, G Ciezarek, P Cifra, PEL Clarke, M Clemencic, HV Cliff, J Closier, C Cocha Toapaxi, V Coco, J Cogan, E Cogneras, L Cojocariu, S Collaviti, P Collins, T Colombo, M Colonna, A Comerma-Montells, L Congedo, A Contu, N Cooke, C Coronel, I Corredoira, A Correia, G Corti, J Cottee Meldrum, B Couturier, DC Craik, M Cruz Torres, E Curras Rivera, R Currie, CL Da Silva, S Dadabaev, L Dai, X Dai, E Dall’Occo, J Dalseno, C D’Ambrosio, J Daniel, P d’Argent, G Darze, A Davidson, JE Davies, O De Aguiar Francisco, C De Angelis, F De Benedetti, J de Boer, K De Bruyn, S De Capua, M De Cian, U De Freitas Carneiro Da Graca, E De Lucia, JM De Miranda, L De Paula, M De Serio, P De Simone, F De Vellis, JA de Vries, F Debernardis, D Decamp, V Dedu, S Dekkers, L Del Buono, B Delaney, H-P Dembinski, J Deng, V Denysenko, O Deschamps, F Dettori, B Dey, P Di Nezza, I Diachkov, S Didenko, S Ding, L Dittmann, V Dobishuk, AD Docheva, C Dong, AM Donohoe, F Dordei, AC dos Reis, AD Dowling, W Duan, P Duda, MW Dudek, L Dufour, V Duk, P Durante, MM Duras, JM Durham, OD Durmus, A Dziurda, A Dzyuba, S Easo, E Eckstein, U Egede, A Egorychev, V Egorychev, S Eisenhardt, E Ejopu, L Eklund, M Elashri, J Ellbracht, S Ely, A Ene, J Eschle, S Esen, T Evans, F Fabiano, S Faghih, LN Falcao, Y Fan, B Fang, L Fantini, M Faria, K Farmer, D Fazzini, L Felkowski, M Feng, M Feo, A Fernandez Casani, M Fernandez Gomez, AD Fernez, F Ferrari, F Ferreira Rodrigues, M Ferrillo, M Ferro-Luzzi, S Filippov, RA Fini, M Fiorini, M Firlej, KL Fischer, DS Fitzgerald, C Fitzpatrick, T Fiutowski, F Fleuret, M Fontana, LF Foreman, R Forty, D Foulds-Holt, V Franco Lima, M Franco Sevilla, M Frank, E Franzoso, G Frau, C Frei, DA Friday, J Fu, Q Führing, Y Fujii, T Fulghesu, E Gabriel, G Galati, MD Galati, A Gallas Torreira, D Galli, S Gambetta, M Gandelman, P Gandini, B Ganie, H Gao, R Gao, TQ Gao, Y Gao, Y Gao, Y Gao, LM Garcia Martin, P Garcia Moreno, J García Pardiñas, P Gardner, KG Garg, L Garrido, C Gaspar, A Gavrikov, LL Gerken, E Gersabeck, M Gersabeck, T Gershon, S Ghizzo, Z Ghorbanimoghaddam, L Giambastiani, FI Giasemis, V Gibson, HK Giemza, AL Gilman, M Giovannetti, A Gioventù, L Girardey, C Giugliano, MA Giza, FC Glaser, VV Gligorov, C Göbel, L Golinka-Bezshyyko, E Golobardes, D Golubkov, A Golutvin, S Gomez Fernandez, W Gomulka, F Goncalves Abrantes, M Goncerz, G Gong, JA Gooding, IV Gorelov, C Gotti, E Govorkova, JP Grabowski, LA Granado Cardoso, E Graugés, E Graverini, L Grazette, G Graziani, AT Grecu, LM Greeven, NA Grieser, L Grillo, S Gromov, C Gu, M Guarise, L Guerry, V Guliaeva, PA Günther, A-K Guseinov, E Gushchin, Y Guz, T Gys, K Habermann, T Hadavizadeh, C Hadjivasiliou, G Haefeli, C Haen, G Hallett, MM Halvorsen, PM Hamilton, J Hammerich, Q Han, X Han, S Hansmann-Menzemer, L Hao, N Harnew, TH Harris, M Hartmann, S Hashmi, J He, F Hemmer, C Henderson, RDL Henderson, AM Hennequin, K Hennessy, L Henry, J Herd, P Herrero Gascon, J Heuel, A Hicheur, G Hijano Mendizabal, J Horswill, R Hou, Y Hou, N Howarth, J Hu, W Hu, X Hu, W Huang, W Hulsbergen, RJ Hunter, M Hushchyn, D Hutchcroft, M Idzik, D Ilin, P Ilten, A Inglessi, A Iniukhin, A Ishteev, K Ivshin, R Jacobsson, H Jage, SJ Jaimes Elles, S Jakobsen, E Jans, BK Jashal, A Jawahery, V Jevtic, E Jiang, X Jiang, Y Jiang, YJ Jiang, M John, A John Rubesh Rajan, D Johnson, CR Jones, TP Jones, S Joshi, B Jost, J Juan Castella, N Jurik, I Juszczak, D Kaminaris, S Kandybei, M Kane, Y Kang, C Kar, M Karacson, D Karpenkov, A Kauniskangas, JW Kautz, MK Kazanecki, F Keizer, M Kenzie, T Ketel, B Khanji, A Kharisova, S Kholodenko, G Khreich, T Kirn, VS Kirsebom, O Kitouni, S Klaver, N Kleijne, K Klimaszewski, MR Kmiec, S Koliiev, L Kolk, A Konoplyannikov, P Kopciewicz, P Koppenburg, A Korchin, M Korolev, I Kostiuk, O Kot, S Kotriakhova, A Kozachuk, P Kravchenko, L Kravchuk, M Kreps, P Krokovny, W Krupa, W Krzemien, O Kshyvanskyi, S Kubis, M Kucharczyk, V Kudryavtsev, E Kulikova, A Kupsc, V Kushnir, BK Kutsenko, I Kyryllin, D Lacarrere, P Laguarta Gonzalez, A Lai, A Lampis, D Lancierini, C Landesa Gomez, JJ Lane, R Lane, G Lanfranchi, C Langenbruch, J Langer, O Lantwin, T Latham, F Lazzari, C Lazzeroni, R Le Gac, H Lee, R Lefèvre, A Leflat, S Legotin, M Lehuraux, E Lemos Cid, O Leroy, T Lesiak, ED Lesser, B Leverington, A Li, C Li, C Li, H Li, J Li, K Li, L Li, M Li, P Li, P-R Li, Q Li, S Li, T Li, T Li, Y Li, Y Li, Z Lian, X Liang, S Libralon, C Lin, T Lin, R Lindner, H Linton, V Lisovskyi, R Litvinov, D Liu, FL Liu, G Liu, K Liu, S Liu, W Liu, Y Liu, Y Liu, YL Liu, G Loachamin Ordonez, A Lobo Salvia, A Loi, T Long, JH Lopes, A Lopez Huertas, S López Soliño, Q Lu, C Lucarelli, D Lucchesi, M Lucio Martinez, V Lukashenko, Y Luo, A Lupato, E Luppi, K Lynch, X-R Lyu, G M., S Maccolini, F Machefert, F Maciuc, B Mack, I Mackay, LM Mackey, LR Madhan Mohan, MJ Madurai, A Maevskiy, D Magdalinski, D Maisuzenko, JJ Malczewski, S Malde, L Malentacca, A Malinin, T Maltsev, G Manca, G Mancinelli, C Mancuso, R Manera Escalero, FM Manganella, D Manuzzi, D Marangotto, JF Marchand, R Marchevski, U Marconi, E Mariani, S Mariani, C Marin Benito, J Marks, AM Marshall, L Martel, G Martelli, G Martellotti, L Martinazzoli, M Martinelli, D Martinez Gomez, D Martinez Santos, F Martinez Vidal, A Martorell I Granollers, A Massafferri, R Matev, A Mathad, V Matiunin, C Matteuzzi, KR Mattioli, A Mauri, E Maurice, J Mauricio, P Mayencourt, J Mazorra de Cos, M Mazurek, M McCann, TH McGrath, NT McHugh, A McNab, R McNulty, B Meadows, G Meier, D Melnychuk, FM Meng, M Merk, A Merli, L Meyer Garcia, D Miao, H Miao, M Mikhasenko, DA Milanes, A Minotti, E Minucci, T Miralles, B Mitreska, DS Mitzel, A Modak, L Moeser, RA Mohammed, RD Moise, EF Molina Cardenas, T Mombächer, M Monk, S Monteil, A Morcillo Gomez, G Morello, MJ Morello, MP Morgenthaler, J Moron, W Morren, AB Morris, AG Morris, R Mountain, H Mu, ZM Mu, E Muhammad, F Muheim, M Mulder, K Müller, F Muñoz-Rojas, R Murta, V Mytrochenko, P Naik, T Nakada, R Nandakumar, T Nanut, I Nasteva, M Needham, E Nekrasova, N Neri, S Neubert, N Neufeld, P Neustroev, J Nicolini, D Nicotra, EM Niel, N Nikitin, Q Niu, P Nogarolli, P Nogga, C Normand, J Novoa Fernandez, G Nowak, C Nunez, HN Nur, A Oblakowska-Mucha, V Obraztsov, T Oeser, S Okamura, A Okhotnikov, O Okhrimenko, R Oldeman, F Oliva, M Olocco, CJG Onderwater, RH O’Neil, D Osthues, JM Otalora Goicochea, P Owen, A Oyanguren, O Ozcelik, F Paciolla, A Padee, KO Padeken, B Pagare, T Pajero, A Palano, M Palutan, X Pan, G Panshin, L Paolucci, A Papanestis, M Pappagallo, LL Pappalardo, C Pappenheimer, C Parkes, D Parmar, B Passalacqua, G Passaleva, D Passaro, A Pastore, M Patel, J Patoc, C Patrignani, A Paul, CJ Pawley, A Pellegrino, J Peng, M Pepe Altarelli, S Perazzini, D Pereima, H Pereira Da Costa, A Pereiro Castro, P Perret, A Perrevoort, A Perro, MJ Peters, K Petridis, A Petrolini, JP Pfaller, H Pham, L Pica, M Piccini, L Piccolo, B Pietrzyk, G Pietrzyk, RN Pilato, D Pinci, F Pisani, M Pizzichemi, V Placinta, M Plo Casasus, T Poeschl, F Polci, M Poli Lener, A Poluektov, N Polukhina, I Polyakov, E Polycarpo, S Ponce, D Popov, S Poslavskii, K Prasanth, C Prouve, D Provenzano, V Pugatch, G Punzi, S Qasim, QQ Qian, W Qian, N Qin, S Qu, R Quagliani, RI Rabadan Trejo, JH Rademacker, M Rama, M Ramírez García, V Ramos De Oliveira, M Ramos Pernas, MS Rangel, F Ratnikov, G Raven, M Rebollo De Miguel, F Redi, J Reich, F Reiss, Z Ren, PK Resmi, M Ribalda Galvez, R Ribatti, G Ricart, D Riccardi, S Ricciardi, K Richardson, M Richardson-Slipper, K Rinnert, P Robbe, G Robertson, E Rodrigues, A Rodriguez Alvarez, E Rodriguez Fernandez, JA Rodriguez Lopez, E Rodriguez Rodriguez, J Roensch, A Rogachev, A Rogovskiy, DL Rolf, P Roloff, V Romanovskiy, A Romero Vidal, G Romolini, F Ronchetti, T Rong, M Rotondo, SR Roy, MS Rudolph, M Ruiz Diaz, RA Ruiz Fernandez, J Ruiz Vidal, J Ryzka, JJ Saavedra-Arias, JJ Saborido Silva, R Sadek, N Sagidova, D Sahoo, N Sahoo, B Saitta, M Salomoni, I Sanderswood, R Santacesaria, C Santamarina Rios, M Santimaria, L Santoro, E Santovetti, A Saputi, D Saranin, A Sarnatskiy, G Sarpis, M Sarpis, C Satriano, A Satta, M Saur, D Savrina, H Sazak, F Sborzacchi, A Scarabotto, S Schael, S Scherl, M Schiller, H Schindler, M Schmelling, B Schmidt, S Schmitt, H Schmitz, O Schneider, A Schopper, N Schulte, S Schulte, MH Schune, G Schwering, B Sciascia, A Sciuccati, I Segal, S Sellam, A Semennikov, T Senger, M Senghi Soares, A Sergi, N Serra, L Sestini, A Seuthe, Y Shang, DM Shangase, M Shapkin, RS Sharma, I Shchemerov, L Shchutska, T Shears, L Shekhtman, Z Shen, S Sheng, V Shevchenko, B Shi, Q Shi, Y Shimizu, E Shmanin, R Shorkin, JD Shupperd, R Silva Coutinho, G Simi, S Simone, M Singha, N Skidmore, T Skwarnicki, MW Slater, E Smith, K Smith, M Smith, A Snoch, L Soares Lavra, MD Sokoloff, FJP Soler, A Solomin, A Solovev, I Solovyev, NS Sommerfeld, R Song, Y Song, Y Song, YS Song, FL Souza De Almeida, B Souza De Paula, E Spadaro Norella, E Spedicato, JG Speer, E Spiridenkov, P Spradlin, V Sriskaran, F Stagni, M Stahl, S Stahl, S Stanislaus, M Stefaniak, EN Stein, O Steinkamp, O Stenyakin, H Stevens, D Strekalina, Y Su, F Suljik, J Sun, L Sun, D Sundfeld, W Sutcliffe, K Swientek, F Swystun, A Szabelski, T Szumlak, Y Tan, Y Tang, MD Tat, A Terentev, F Terzuoli, F Teubert, E Thomas, DJD Thompson, H Tilquin, V Tisserand, S T’Jampens, M Tobin, L Tomassetti, G Tonani, X Tong, T Tork, D Torres Machado, L Toscano, DY Tou, C Trippl, G Tuci, N Tuning, LH Uecker, A Ukleja, DJ Unverzagt, A Upadhyay, B Urbach, A Usachov, A Ustyuzhanin, U Uwer, V Vagnoni, V Valcarce Cadenas, G Valenti, N Valls Canudas, J van Eldik, H Van Hecke, E van Herwijnen, CB Van Hulse, R Van Laak, M van Veghel, G Vasquez, R Vazquez Gomez, P Vazquez Regueiro, C Vázquez Sierra, S Vecchi, JJ Velthuis, M Veltri, A Venkateswaran, M Verdoglia, M Vesterinen, D Vico Benet, P Vidrier Villalba, M Vieites Diaz, X Vilasis-Cardona, E Vilella Figueras, A Villa, P Vincent, B Vivacqua, FC Volle, D vom Bruch, N Voropaev, K Vos, C Vrahas, J Wagner, J Walsh, EJ Walton, G Wan, A Wang, C Wang, G Wang, H Wang, J Wang, J Wang, J Wang, J Wang, M Wang, NW Wang, R Wang, X Wang, X Wang, XW Wang, Y Wang, YW Wang, Z Wang, Z Wang, Z Wang, JA Ward, M Waterlaat, NK Watson, D Websdale, Y Wei, J Wendel, BDC Westhenry, C White, M Whitehead, E Whiter, AR Wiederhold, D Wiedner, G Wilkinson, MK Wilkinson, M Williams, MJ Williams, MRJ Williams, R Williams, Z Williams, FF Wilson, M Winn, W Wislicki, M Witek, L Witola, G Wormser, SA Wotton, H Wu, J Wu, X Wu, Y Wu, Z Wu, K Wyllie, S Xian, Z Xiang, Y Xie, TX Xing, A Xu, L Xu, L Xu, M Xu, Z Xu, Z Xu, Z Xu, K Yang, S Yang, X Yang, Y Yang, Z Yang, V Yeroshenko, H Yeung, H Yin, X Yin, CY Yu, J Yu, X Yuan, Y Yuan, E Zaffaroni, M Zavertyaev, M Zdybal, F Zenesini, C Zeng, M Zeng, C Zhang, D Zhang, J Zhang, L Zhang, S Zhang, S Zhang, Y Zhang, YZ Zhang, Z Zhang, Y Zhao, A Zhelezov, SZ Zheng, XZ Zheng, Y Zheng, T Zhou, X Zhou, Y Zhou, V Zhovkovska, LZ Zhu, X Zhu, X Zhu, Y Zhu, V Zhukov, J Zhuo, Q Zou, D Zuliani, G Zunica

Abstract:

The Ξ c + π π + spectrum is investigated using proton-proton collisions at a center-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 5.4 fb 1 , collected by the LHCb experiment during 2016–2018. Four states are observed with high significance, and their masses and widths are measured to be m [ Ξ c ( 2815 ) + ] = 2816.65 ± 0.03 ± 0.03 ± 0.23 MeV , Γ [ Ξ c ( 2815 ) + ] = 2.07 ± 0.08 ± 0.12 MeV , m [ Ξ c ( 2923 ) + ] = 2922.8 ± 0.3 ± 0.5 ± 0.2 MeV , Γ [ Ξ c ( 2923 ) + ] = 5.3 ± 0.9 ± 1.4 MeV , m [ Ξ c ( 2970 ) + ] = 2968.6 ± 0.5 ± 0.5 ± 0.2 MeV , Γ [ Ξ c ( 2970 ) + ] = 31.7 ± 1.7 ± 1.9 MeV , [ Ξ c ( 3080 ) + ] = 3076.8 ± 0.7 ± 1.3 ± 0.2 MeV , Γ [ Ξ c ( 3080 ) + ] = 6.8 ± 2.3 ± 0.9 MeV , where the uncertainties are statistical, systematic, and due to the limited precision on the Ξ c + mass, respectively. The Ξ c ( 2923 ) + baryon is observed for the first time, and is consistent with being the isospin partner of the previously observed Ξ c ( 2923 ) 0 state. Most of the measured parameters are more precise than existing world averages.

Future Circular Collider Feasibility Study Report

The European Physical Journal Special Topics Springer Nature (2025) 1-271

Authors:

M Benedikt, F Zimmermann, B Auchmann, W Bartmann, JP Burnet, C Carli, A Chancé, P Craievich, M Giovannozzi, C Grojean, J Gutleber, K Hanke, A Henriques, P Janot, C Lourenço, M Mangano, T Otto, J Poole, S Rajagopalan, T Raubenheimer, E Todesco, L Ulrici, T Watson, G Wilkinson, A Abada, M Abbrescia, H Abdolmaleki, SH Abidi, A Abramov, C Adam, M Ady, PR Adz̆ić, I Agapov, D Aguglia, I Ahmed, M Aiba, G Aielli, T Akan, N Akchurin, D Akturk, M Al-Thakeel, GL Alberghi, J Alcaraz Maestre, M Aleksa, R Aleksan, F Alharthi, J Alimena, A Alimenti, S Alioli, L Alix, BC Allanach, L Allwicher, AA Altintas, M Altınlı, M Alviggi, G Ambrosio, Y Amhis, A Amiri, G Ammirabile, T Andeen, KDJ André, J Andrea, A Andreazza, M Andreini, T Andriollo, L Angel, M Angelucci, S Antusch, MN Anwar, L Apolinário, G Apollinari, RB Appleby, A Apresyan, Aram Apyan, Armen Apyan, A Arbey, B Argiento, V Ari, S Arias, B Arias Alonso, O Arnaez, R Arnaldi, F Arneodo, H Arnold, P Arrutia Sota, ME Ascioti, KA Assamagan, S Aumiller, G Aydın, K Azizi, P Azzi, N Bacchetta, A Bacci, B Bai, Y Bai, L Balconi, G Baldinelli, B Balhan, AH Ball, A Ballarino, S Banerjee, S Banik, DP Barber, MB Barbero, D Barducci, D Barna, GG Barnaföldi, MJ Barnes, AJ Barr, R Bartek, H Bartosik, SA Bass, U Bassler, MJ Basso, A Bastianin, P Bataillard, M Battistin, J Bauche, L Baudin, J Baudot, B Baudouy, L Bauerdick, C Bayındır, HP Beck, F Bedeschi, C Bee, M Begel, M Behtouei, L Bellagamba, N Bellegarde, E Belli, E Bellingeri, S Belomestnykh, AD Benaglia, G Bencivenni, J Bendavid, M Benmergui, M Benoit, D Benvenuti, T Bergauer, N Bernachot, G Bernardi, J Bernardi, Q Berthet, S Bertoni, C Bertulani, MI Besana, A Besson, M Bettelini, S Bettoni, S Beuvier, PC Bhat, S Bhattacharya, J Bhom, ME Biagini, A Bibet-Chevalier, M Bicrel, M Biglietti, GM Bilei, B Bilki, K Bisgaard Christensen, T Biswas, F Blanc, F Blekman, A Blondel, J Blümlein, D Boccanfuso, A Bogomyagkov, P Boillon, P Boivin, MJ Boland, S Bologna, O Bolukbasi, R Bonnet, J Borburgh, F Bordry, P Borges de Sousa, G Borghello, L Borriello, D Bortoletto, M Boscolo, L Bottura, G Boudoul, V Boudry, R Boughezal, D Bourilkov, M Boyd, D Boye, G Bozzi, V Braccini, C Bracco, B Bradu, A Braghieri, S Braibant, J Bramante, GC Branco, R Brenner, N Brisa, D Britzger, G Broggi, L Bromiley, E Brost, Q Bruant, R Bruce, E Bründermann, L Brunetti, O Brüning, O Brunner, X Buffat, E Bulyak, A Burdyko, H Burkhardt, PN Burrows, S Busatto, S Buschaert, D Buttazzo, A Butterworth, D Butti, G Cacciapaglia, Y Cai, B Caiffi, V Cairo, O Cakir, P Calafiura, R Calaga, S Calatroni, DG Caldwell, A Çalışkan, C Calpini, M Calviani, E Camacho-Pérez, P Camarri, L Caminada, M Campajola, AC Canbay, K Canderan, S Candido, F Canelli, A Canepa, S Cantarella, KB Cantún-Avila, L Capriotti, A Caram, A Carbone, JM Carceller, G Carini, F Carlier, CM Carloni Calame, F Carra, C Cartannaz, S Casenove, G Catalano, V Cavaliere, C Cazzaniga, C Cecchi, FG Celiberto, M Cepeda, F Cerutti, F Cetorelli, G Chachamis, Y Chae, F Chagnet, I Chaikovska, M Chalhoub, M Chamizo-Llatas, M Champagne, H Chanal, G Chapelier, P Charitos, C Charles, TK Charles, C Charlot, S Chatterjee, A Chaudhuri, R Chehab, SV Chekanov, H Chen, T Chesne, F Chiapponi, G Chiarello, M Chiesa, P Chiggiato, P Chomaz, M Chorowski, JP Chou, M Chrzaszcz, W Chung, S Ciarlantini, A Ciarma, D Cieri, AK Ciftci, R Ciftci, R Cimino, F Cirotto, M Ciuchini, M Cobal, A Coccaro, R Coelho Lopes De Sa, JA Coleman-Smith, F Collamati, C Colldelram, P Collier, P Collins, J Collot, M Colmenero, L Colnot, G Coloretti, D Contardo, E Conte, FA Conventi, A Cook, L Cooley, AS Cornell, C Cornella, G Cornette, I Corredoira, P Costa Pinto, F Couderc, J Coupard, S Coussy, G Crawford, R Crescenzi, I Crespo Garrido, T Critchley, A Crivellin, T Croci, C Cudré, G Cummings, F Cuna, R Cunningham, B Curé, E Curtis, M D’Alfonso, L D’Aloia Schwartzentruber, G D’Amen, B D’Anzi, A D’Avanzo, D d’Enterria, A D’Onofrio, M D’Onofrio, M Da Col, M Da Rocha Rolo, C Dachauer, B Dağli, A Dainese, B Dalena, W Dallapiazza, M Dam, H Damerau, V Dao, A Das, MS Daugaard, S Dauphin, A David, T Davídek, GJ Davies, J Davighi, S Dawson, J de Blas, A de Cosa, S De Curtis, N De Filippis, E De Lucia, R De Maria, E De Matteis, A De Roeck, A De Santis, A De Vita, A Deandrea, CJ Debono, M Deeb, MM Defranchis, J Degens, S Deghaye, V Del Duca, CL Del Pio, A Del Vecchio, D Delikaris, A Dell’Acqua, M Della Pietra, M Delmastro, L Delprat, E Delugas, Z Demiragli, L Deniau, D Denisov, H Denizli, A Denner, A Denot, G Deptuch, A Desai, H Deveci, A Di Canto, A Di Ciaccio, L Di Ciaccio, D Di Croce, C Di Fraia, B Di Micco, R Di Nardo, TB Dingley, F Djama, F Djurabekova, D Dockery, S Doebert, D Domange, M Donegà, U Dosselli, HA Dostmann, JA Dragovich, I Drebot, M Drewes, TA du Pree, Z Duan, C Duarte-Galvan, O Duboc, I Dubovyk, M Duda, P Duda, H Duran Yildiz, H Durand, P Durand, G Durieux, Y Dutheil, I Dutta, JS Dutta, S Dutta, F Duval, F Eder, M Eisterer, Z El Bitar, A El Saied, M Elisei, J Ellis, W Elmetenawee, J Elmsheuser, V Daniel Elvira, SC Eno, Y Enomoto, BA Erdelyi, OE Eruteya, M Escobar, O Etisken, I Eymard, J Eysermans, D Falchieri, C Falkenberg, F Fallavollita, A Afalou, J Faltova, J Fanini, L Fanò, K Fanti, R Farinelli, M Farino, S Farinon, H Fatehi, J Fatterbert, A Faure, A Faus-Golfe, G Favia, L Favilla, WJ Fawcett, A Federowicz, L Feligioni, L Felsberger, Y Feng, A Fernández Téllez, R Ferrari, L Ferreira, F Ferro, M Fiascaris, C Fiorio, SA Fleury, L Florez, M Florio, A Fondacci, B Fontimpe, K Foraz, R Fortunati, M Fouaidy, A Foussat, A Fowler, JD Fox, M Francesconi, B Francois, R Franqueira Ximenes, F Fransesini, A Frasca, A Freitas, JA Frost, K Furukawa, A Gabrielli, A Gaddi, F Gaede, A Gallén, R Galler, E Gallice, E Gallo, H Gamper, G Ganis, S Ganjour, S Gao, A Garand, C Garaus, D Garcia, R García Alía, R García Gil, CM Garcia Jaimes, H Garcia Rodrigues, C Garion, M Garlaschè, D Garnier, MV Garzelli, S Gascon-Shotkin, M Gasior, G Gaudino, G Gaudio, V Gaur, K Gautam, V Gawas, T Gehrmann, A Gehrmann-De Ridder, K Geiger, M Genco, F Gerigk, H Gerwig, A Ghribi, P Giacomelli, S Giagu, E Gianfelice, S Giappichini, D Gibellieri, F Giffoni, G Gil da Silveira, SS Gilardoni, M Giovannetti, T Girardet, S Girod, P Giubellino, P Giubilato, F Giuli, M Giuliani, EL Gkougkousis, S Glukhov, J Gluza, B Goddard, C Goffing, D Goldsworthy, T Golling, R Gonçalo, VP Gonçalves, T Gonçalves Da Silva, J Gonski, R Gonzalez Suarez, S Gorgi Zadeh, S Gori, E Gorini, L Gouskos, M Gouzevitch, E Granados, F Grancagnolo, S Grancagnolo, A Grassellino, A Grau, E Graverini, FG Gravili, HM Gray, M Grazzini, Mario Greco, Michela Greco, A Greljo, J-L Grenard, AV Gritsan, R Gröber, A Grudiev, E Gschwendtner, J Gu, D Guadagnoli, G Guerrieri, A Guiavarch, G Guillermo Canton, M Guinchard, YO Günaydin, K Gurcel, LX Gutierrez Guerrero, D Gutiérrez Rueda, A Gutiérrez-Rodríguez, V Guzey, C Haber, T Hacheney, B Hacışahinoğlu, K Hahn, J Hajer, T Hakulinen, JC Hammersley, M Hance, JB Hansen, B Härer, E Hauzinger, M Haviernik, B Hegner, C Helsens, Ana Henriques, C Hernalsteens, H Hernández-Arellano, RJ Hernández-Pinto, MA Hernández-Ruíz, J Hernández-Sánchez, JW Heron, LM Herrmann, R Hirosky, JF Hirschauer, JD Hobbs, K Hock, S Höche, M Hofer, G Hoffstaetter, W Höfle, M Hohlmann, F Holdener, B Holzer, CG Honorato, H Hoorani, A Houver, E Howling, X Huang, F Hug, B Humann, P Hunchak, Y Husein, A Hussain, G Iadarola, G Iakovidis, G Iaselli, P Iengo, A Ilg, M Iodice, AOM Iorio, V Ippolito, U Iriso, J Isaacson, G Isidori, R Islam, A Istepanyan, S Izquierdo Bermudez, V Izzo, PD Jackson, R Jafari, SS Jagabathuni, S Jana, C Järmyr Eriksson, P Jausserand, M Jensen, JM Jimenez, FR Joaquim, OR Jones, J Joos, E Jourd’huy, E Jourdan, JM Jowett, A Jueid, AW Jung, M Kagan, I Kahraman, V Kain, J Kalinowski, JF Kamenik, A Kanso, T Kar, SO Kara, H Karadeniz, B Karmakar, SR Karmarkar, V Karpati, I Karpov, M Karppinen, P Karst, S Kartal, VV Kashikhin, U Kaya, A Kehagias, J Keintzel, M Kennouche, M Kenzie, M Kerréveur-Lavaud, R Kersevan, V Keus, H Khanpour, VV Khoze, VA Khoze, P Kicsiny, R Kieffer, C Kiel, J Kieseler, A Kilic, B Kilminster, S Kim, Z Kırca, M Klein, A Klimentov, M Klute, V Klyukhin, M Knecht, B Kniehl, P Ko, S Ko, F Kocak, T Koffas, C Kokkinos, K Kołodziej, K Kong, P Kontaxakis, IA Koop, P Kopciewicz, P Koppenburg, M Koratzinos, K Kordas, A Korsun, O Kortner, S Kortner, B Korzh, T Koseki, J Kosse, P Kostka, S Kostoglou, AV Kotwal, G Kozlov, I Kozsar, T Kramer, P Krkotić, H Kroha, K Kröninger, S Kuday, G Kuhlmann, O Kuhlmann, M Kuhn, A Kulesza, M Kumar, F Kurian, A Kurtulus, TH Kwok, S La Mendola, M Lackner, T Ładziński, D Lafarge, P Laïdouni, G Lamanna, N Lamas, G Landsberg, C Lange, DJ Lange, A Langner, AJ Lankford, L Lari, MS Larson, K Lasocha, A Latina, S Lauciani, M Laufenberg, G Lavezzari, L Lavezzi, L Lavezzo, M Le Garrec, A Le Jeune, P Lebrun, Y Léchevin, A Lechner, E Lecointe, JSH Lee, SW Lee, SJ Lee, T Lefevre, C Leggett, T Lehtinen, S Leone, C Leonidopoulos, S Leontsinis, G Leprince-Maillère, G Lerner, O Leroy, T Lesiak, P Levai, A Leveratto, R Levi, A Li, S Li, D Liberati, GL Lichtenstein, M Liepe, Z Ligeti, H Lin, S Linda, E Lipeles, Z Liu, SM Liuzzo, T Loeliger, A Loeschcke Centeno, A Lorenzetti, C Lorin, R Losito, M Louka, ML Loureiro García, I Low, K Lubonis, MT Lucchini, V Lukashenko, G Luminati, AJG Lunt, A Lusiani, M Luzum, H Ma, A Maas, E Macchia, A Macchiolo, GE Machinet, R Madar, T Madlener, C Madrid, A Magalotti, M Maggiora, A-M Magnan, MA Mahmoud, Y Mahmoud, F Mahmoudi, H Mainaud Durand, J Maitre, Y Makhloufi, B Malaescu, A Malagoli, CH Malan, M Malekhosseini, A Maloizel, S Malvezzi, A Malzac, G Manco, LS Mandacarú Guerra, P Manfrinetti, E Manoni, J Mans, L Mantani, S Manzoni, L Marafatto, C Marcel, T Marcel, R Marchevski, G Marchiori, F Mariani, V Mariani, S Marin, C Marinas, V Marinozzi, S Mariotto, C Marquis, J Martelain, G Martelli, A Martens, I Martin-Melero, VI Martinez Outschoorn, F Martinez, CM Jardim, L Marzola, S Masciocchi, A Mashal, A Masi, I Masina, P Mastrapasqua, V Mateu, S Mattiazzo, M Maugis, V Maura, D Mauree, GHI Maury-Cuna, A Mayoux, E Mazzeo, S Mazzoni, M McCullough, M Meena, E Meftah, Andrew Mehta, Ankita Mehta, B Mele, R Mena-Andrade, M Mentink, D Mergelkuhl, V Mertinger, L Mether, S Meylan, T Michel, T Michlmayr, M Migliorati, A Milanese, C Milardi, G Milhano, M Minty, C Mirabelli, T Miralles, L Miralles Verge, D Mirarchi, K Mirbaghestan, N Mirian, VA Mitsou, DS Mitzel, M Mlynarikova, S Möbius, M Mohammadi Najafabadi, GB Mohanty, RN Mohapatra, S Moneta, PF Monni, E Monnier, S Monteil, I León Monzón, F Moortgat, N Morange, M Moretti, S Moretti, T Mori, I Morozov, A Morozzi, M Morrone, A Moscariello, F Moscatelli, I Moulin, N Mounet, A Mueller, A-S Müller, BO Müller, J Mundet, E Musa, V Musat, R Musenich, E Musumeci, M Mylona, VV Mytrochenko, B Nachman, S Nagaitsev, T Nakamoto, M Napsuciale, M Nardecchia, G Nardini, G Narváez-Arango, S Naseem, A Natochii, A Navascues Cornago, B Naydenov, G Nergiz, AV Nesterenko, C Neubüser, HB Newman, F Niccoli, O Nicrosini, U Niedermayer, G Niehues, J Nielsen, G Nigrelli, S Nikitin, IB Nikolaev, A Nisati, N Nitika, JM No, M Nonis, Y Nosochkov, A Novokhatski, JM O’Callaghan, SA Ochoa-Oregon, K Ohmi, K Oide, VA Okorokov, C Oleari, D Oliveira Damazio, Y Onel, A Onofre, P Osland, YM Oviedo-Torres, A Ozansoy, F Ozaydin, K Ozdemir, A Ozturk, MA Pérez de León, S Pacetti, H Pacey, J Paciello, CE Pagliarone, A Paillex, HF Pais da Silva, F Palla, A Pampaloni, C Pancotti, M Pandurović, O Panella, G Panizzo, C Pantouvakis, L Panwar, P Paolucci, Y Papa, A Papaefstathiou, Y Papaphilippou, A Paramonov, A Pareti, B Parker, V Parma, F Parodi, M Parodi, B Paroli, JA Parsons, D Passarelli, D Passeri, B Pattnaik, A Patwa, C Paus, F Pauss, F Peauger, I Pedraza, R Pedro, J Pekkanen, G Peon, A Perez, E Perez, F Pérez, JC Perez, JM Pérez, R Perez-Ramos, G Pérez Segurana, A Perillo Marcone, S Perna, K Peters, S Petracca, AR Petri, F Petriello, A Petrovic, L Pezzotti, G Piacquadio, G Piazza, A Piccini, F Piccinini, A Pich, T Pieloni, J Pierlot, AD Pilkington, M Pillet, M Pinamonti, N Pinto, L Pintucci, F Pinzauti, K Piotrzkowski, C Pira, M Pitt, R Pittau, S Pittet, P Placidi, W Płaczek, S Plätzer, M-A Pleier, E Ploerer, H Podlech, F Poirier, G Polesello, M Poli Lener, J Polinski, Z Polonsky, N Pompeo, M Pont, G Alexandru-Popeneciu, W Porod, L Porta, L Portales, T Portaluri, MAC Potenza, C Prasse, E Premat, M Presilla, S Prestemon, A Price, M Primavera, R Principe, M Prioli, FM Procacci, E Proserpio, A Provino, C Pueyo, T Puig, N Pukhaeva, S Pulawski, G Punzi, A Pyarelal, J Qian, H Quack, FS Queiroz, G Quintas-Neves, H Rafique, J-Y Raguin, J Raidal, M Raidal, P Raimondi, A Rajabi, S Ramírez-Uribe, S Randles, T Rao, CØ Rasmussen, A Ratkus, PN Ratoff, P Razis, P Rebello Teles, MN Rebelo, M Reboud, S Redaelli, C Regazzoni, L Reichenbach, M Reissig, E Renou, A Rentería-Olivo, J Reuter, S Rey, A Ribon, D Ricci, W Riegler, M Rignanese, S Rimjaem, RA Rimmer, R Rinaldesi, L Rinolfi, O Rios, G Ripellino, B Rivas, A Rivetti, T Robens, F Robert, E Robutti, C Roderick, G Rodrigo, M Rodríguez-Cahuantzi, L Röhrig, M Roig, F Rojat, J Rojo, J Roloff, P Roloff, A Romanenko, A Romero Francia, H Romeyer, N Rompotis, N Rongieras, G Rosaz, K Roslon, M Rossetti Conti, A Rossi, E Rossi, L Rossi, AN Rossia, S Rostami, G Roy, B Rubik, I Ruehl, A Ruiz-Jimeno, R Ruprecht, JP Rutherfoord, L Rygaard, MS Ryu, L Sabato, G Sadowski, D Saez de Jauregui, M Sahin, A Sailer, M Saito, P Saiz, GP Salam, R Salerno, T Salmi, B Salvachua, JPT Salvesen, B Salvi, D Sampsonidis, Y Villamizar, C Sandoval, S Sanfilippo, E Santopinto, R Santoro, X Sarasola, L Sarperi, IH Sarpün, S Sasikumar, M Sauvain, A Savoy-Navarro, R Sawada, G Sborlini, J Scamardella, M Schaer, M Schaumann, M Schenk, C Scheuerlein, C Schiavi, A Schloegelhofer, D Schoerling, A Schöning, S Schramm, D Schulte, P Schwaller, A Schwartzman, P Schwemling, R Schwienhorst, A Sciandra, L Scibile, I Scimemi, E Scomparin, C Sebastiani, B Seeber, JT Seeman, F Sefkow, M Seidel, S Seidel, J Seixas, N Selimović, M Selvaggi, C Senatore, A Senol, N Serra, A Seryi, A Sfyrla, Pramond Sharma, Punit Sharma, CJ Sharp, L Shchutska, V Shiltsev, M Siano, R Sierra, E Silva, RC Silva, L Silvestrini, F Simon, G Simonetti, R Simoniello, BK Singh, S Singh, B Singhal, A Siodmok, Y Sirois, E Sirtori, B Sitar, D Sittard, E Sitti, T Sjöstrand, P Skands, L Skinnari, K Skoufaris, K Skovpen, M Skrzypek, P Slavich, V Slokenbergs, V Smaluk, J Smiesko, SS Snyder, E Solano, P Sollander, OV Solovyanov, M Son, F Sonnemann, R Soos, F Sopkova, T Sorais, M Sorbi, S Sorti, R Soualah, M Souayah, L Spallino, S Spanier, P Spiller, M Spira, D Stagnara, M Stallmann, D Standen, JL Stanyard, B Stapf, GH Stark, M Statera, C Staudinger, BA Stefanek, G Streicher, NP Strohmaier, R Stroynowski, S Stucci, G Stupakov, S Su, A Sublet, K Sugita, MK Sullivan, S Sultansoy, D Sutherland, I Syratchev, R Szafron, A Sznajder, W Tachon, ND Tagdulang, NA Tahir, Y Takahashi, J Tamazirt, S Tang, Y Tanimoto, I Tapan, GF Tassielli, AM Teixeira, VI Telnov, HHJ Ten Kate, V Teotia, J ter Hoeve, A Thabuis, GT Telles, A Tishelman-Charny, S Tissandier, S Tizchang, J-P Tock, B Todd, L Toffolin, A Tolosa-Delgado, R Tomás García, T Tomasini, G Tonelli, T Tong, F Toral, T Torims, L Torino, K Torokhtii, R Torre, E Torrence, R Torres, T Mitsuhashi, A Tracogna, O Traver, D Treille, A Tricoli, P Trubacova, E Tsesmelis, G Tsipolitis, V Tsulaia, B Tuchming, CG Tully, I Turk Cakir, C Turrioni, J Tynan, FP Ucci, S Udongwo, CS Ün, A Unnervik, A Upegui, JP Uribe-Ramírez, J Uythoven, R Vaglio, F Valchkova-Georgieva, P Valente, RU Valente, A-M Valente-Feliciano, G Valentino, CA Valerio-Lizarraga, S Valette, JWF Valle, L Valle, N Valle, N Vallis, G Vallone, P van Gemmeren, W Van Goethem, P van Hees, U van Rienen, L van Riesen-Haupt, P Van Trappen, M Vande Voorde, AL Vanel, EW Varnes, J-L Vay, F Veit, I Veliscek, R Veness, A Ventura, S Verdú-Andrés, M Verducci, CB Verhaaren, C Vernieri, AP Verweij, J-F Vian, A Vicini, N Vignaroli, S Vignetti, MC Villeneuve, I Vivarelli, E Voevodina, DM Vogt, B Voirin, S Voiriot, J Voiron, P Vojtyla, V Völkl, L von Freeden, Z Vostrel, N Voumard, E Vryonidou, V Vysotsky, R Wallny, L-T Wang, Y Wang, R Wanzenberg, BFL Ward, N Wardle, Z Wa̧s, L Watrelot, AT Watson, MF Watson, MS Weber, CP Welsch, M Wendt, J Wenninger, B Weyer, G White, S White, B Wicki, M Widorski, UA Wiedemann, AR Wiederhold, A Wiedl, H-U Wienands, A Wieser, C Wiesner, H Wilkens, D Willi, PH Williams, SL Williams, A Winter, RB Wittwer, D Wollmann, Y Wu, Z Wu, J Xiao, K Xie, S Xie, M Yalvac, F Yaman, W-M Yao, M Yeresko, A Yilmaz, HD Yoo, T You, F Yu, SS Yu, T-T Yu, S Yue, A Zaborowska, M Zahnd, C Zamantzas, G Zanderighi, C Zannini, R Zanzottera, P Zaro, R Zennaro, M Zerlauth, H Zhang, J Zhang, Y Zhang, Z Zhang, Y Zhao, Y-M Zhong, B Zhou, D Zhou, J Zhu, G Zick, MA Zielinski, E Zimmermann, A Zingaretti, J Zinn-Justin, AV Zlobin, M Zobov, F Zomer, S Zorzetti, X Zuo, J Zurita, VV Zutshi, M Zykova

Abstract:

Volume 3 of the FCC Feasibility Report presents studies related to civil engineering, the development of a project implementation scenario, and environmental and sustainability aspects. The report details the iterative improvements made to the civil engineering concepts since 2018, taking into account subsurface conditions, accelerator and experiment requirements, and territorial considerations. It outlines a technically feasible and economically viable civil engineering configuration that serves as the baseline for detailed subsurface investigations, construction design, cost estimation, and project implementation planning. Additionally, the report highlights ongoing subsurface investigations in key areas to support the development of an improved 3D subsurface model of the region. The report describes the development of the project scenario based on the ‘avoid-reduce-compensate’ iterative optimisation approach. The reference scenario balances optimal physics performance with territorial compatibility, implementation risks, and costs. Environmental field investigations covering almost 600 hectares of terrain—including numerous urban, economic, social, and technical aspects—confirmed the project’s technical feasibility and contributed to the preparation of essential input documents for the formal project authorisation phase. The summary also highlights the initiation of public dialogue as part of the authorisation process. The results of a comprehensive socio-economic impact assessment, which included significant environmental effects, are presented. Even under the most conservative and stringent conditions, a positive benefit-cost ratio for the FCC-ee is obtained. Finally, the report provides a summary of the studies conducted to document the current state of the environment.

Observation of χcJJ=012→pp¯ηη

Journal of High Energy Physics Springer Nature 2025:10 (2025) 90

Authors:

M Ablikim, MN Achasov, P Adlarson, XC Ai, R Aliberti, A Amoroso, Q An, Y Bai, O Bakina, Y Ban, H-R Bao, V Batozskaya, K Begzsuren, N Berger, M Berlowski, M Bertani, D Bettoni, F Bianchi, E Bianco, A Bortone, I Boyko, RA Briere, A Brueggemann, H Cai, MH Cai, X Cai, A Calcaterra, GF Cao, N Cao, SA Cetin, XY Chai, JF Chang, GR Che, YZ Che, G Chelkov, C Chen, CH Chen, Chao Chen, G Chen, HS Chen, HY Chen, ML Chen, SJ Chen, SL Chen, SM Chen, T Chen, XR Chen, XT Chen, YB Chen, YQ Chen, ZJ Chen, ZK Chen, SK Choi, X Chu, G Cibinetto, F Cossio, JJ Cui, HL Dai, JP Dai, A Dbeyssi, RE de Boer, D Dedovich, CQ Deng, ZY Deng, A Denig, I Denysenko, M Destefanis, F De Mori, B Ding, XX Ding, Y Ding, Y Ding, YX Ding, J Dong, LY Dong, MY Dong, X Dong, MC Du, SX Du, YY Duan, ZH Duan, P Egorov, GF Fan, JJ Fan, YH Fan, J Fang, J Fang, SS Fang, WX Fang, YQ Fang, R Farinelli, L Fava, F Feldbauer, G Felici, CQ Feng, JH Feng, YT Feng, M Fritsch, CD Fu, JL Fu, YW Fu, H Gao, XB Gao, YN Gao, YN Gao, YY Gao, Yang Gao, S Garbolino, I Garzia, PT Ge, ZW Ge, C Geng, EM Gersabeck, A Gilman, K Goetzen, JD Gong, L Gong, WX Gong, W Gradl, S Gramigna, M Greco, MH Gu, YT Gu, CY Guan, AQ Guo, LB Guo, MJ Guo, RP Guo, YP Guo, A Guskov, J Gutierrez, KL Han, TT Han, F Hanisch, KD Hao, XQ Hao, FA Harris, KK He, KL He, FH Heinsius, CH Heinz, YK Heng, C Herold, T Holtmann, PC Hong, GY Hou, XT Hou, YR Hou, ZL Hou, BY Hu, HM Hu, JF Hu, QP Hu, SL Hu, T Hu, Y Hu, ZM Hu, GS Huang, KX Huang, LQ Huang, P Huang, XT Huang, YP Huang, YS Huang, T Hussain, N Hüsken, N in der Wiesche, J Jackson, S Janchiv, Q Ji, QP Ji, W Ji, XB Ji, XL Ji, YY Ji, ZK Jia, D Jiang, HB Jiang, PC Jiang, SJ Jiang, TJ Jiang, XS Jiang, Y Jiang, JB Jiao, JK Jiao, Z Jiao, S Jin, Y Jin, MQ Jing, XM Jing, T Johansson, S Kabana, N Kalantar-Nayestanaki, XL Kang, XS Kang, M Kavatsyuk, BC Ke, V Khachatryan, A Khoukaz, R Kiuchi, OB Kolcu, B Kopf, M Kuessner, X Kui, N Kumar, A Kupsc, W Kühn, Q Lan, WN Lan, TT Lei, ZH Lei, M Lellmann, T Lenz, C Li, C Li, CH Li, CK Li, Cheng Li, DM Li, F Li, G Li, HB Li, HJ Li, HN Li, Hui Li, JR Li, JS Li, K Li, KL Li, KL Li, LJ Li, Lei Li, MH Li, MR Li, PL Li, PR Li, QM Li, QX Li, R Li, T Li, TY Li, WD Li, WG Li, X Li, XH Li, XL Li, XY Li, XZ Li, Y Li, YG Li, YP Li, ZJ Li, ZY Li, C Liang, H Liang, YF Liang, YT Liang, GR Liao, LB Liao, MH Liao, YP Liao, J Libby, A Limphirat, CC Lin, CX Lin, DX Lin, LQ Lin, T Lin, BJ Liu, BX Liu, C Liu, CX Liu, F Liu, FH Liu, Feng Liu, GM Liu, H Liu, HB Liu, HH Liu, HM Liu, Huihui Liu, JB Liu, JJ Liu, K Liu, K Liu, KY Liu, Ke Liu, L Liu, LC Liu, Lu Liu, PL Liu, Q Liu, SB Liu, T Liu, WK Liu, WM Liu, WT Liu, X Liu, X Liu, XY Liu, Y Liu, Y Liu, Yuan Liu, YB Liu, ZA Liu, ZD Liu, ZQ Liu, XC Lou, FX Lu, HJ Lu, JG Lu, Y Lu, YH Lu, YP Lu, ZH Lu, CL Luo, JR Luo, JS Luo, MX Luo, T Luo, XL Luo, ZY Lv, XR Lyu, YF Lyu, YH Lyu, FC Ma, H Ma, HL Ma, JL Ma, LL Ma, LR Ma, QM Ma, RQ Ma, RY Ma, T Ma, XT Ma, XY Ma, YM Ma, FE Maas, I MacKay, M Maggiora, S Malde, YJ Mao, ZP Mao, S Marcello, YH Meng, ZX Meng, JG Messchendorp, G Mezzadri, H Miao, TJ Min, RE Mitchell, XH Mo, B Moses, N Yu Muchnoi, J Muskalla, Y Nefedov, F Nerling, LS Nie, IB Nikolaev, Z Ning, S Nisar, QL Niu, WD Niu, SL Olsen, Q Ouyang, S Pacetti, X Pan, Y Pan, A Pathak, YP Pei, M Pelizaeus, HP Peng, YY Peng, K Peters, JL Ping, RG Ping, S Plura, V Prasad, FZ Qi, HR Qi, M Qi, S Qian, WB Qian, CF Qiao, JH Qiao, JJ Qin, JL Qin, LQ Qin, LY Qin, PB Qin, XP Qin, XS Qin, ZH Qin, JF Qiu, ZH Qu, CF Redmer, A Rivetti, M Rolo, G Rong, SS Rong, Ch Rosner, MQ Ruan, SN Ruan, N Salone, A Sarantsev, Y Schelhaas, K Schoenning, M Scodeggio, KY Shan, W Shan, XY Shan, ZJ Shang, JF Shangguan, LG Shao, M Shao, CP Shen, HF Shen, WH Shen, XY Shen, BA Shi, H Shi, JL Shi, JY Shi, SY Shi, X Shi, HL Song, JJ Song, TZ Song, WM Song, YX Song, S Sosio, S Spataro, F Stieler, SS Su, YJ Su, GB Sun, GX Sun, H Sun, HK Sun, JF Sun, K Sun, L Sun, SS Sun, T Sun, YC Sun, YH Sun, YJ Sun, YZ Sun, ZQ Sun, ZT Sun, CJ Tang, GY Tang, J Tang, LF Tang, M Tang, YA Tang, LY Tao, M Tat, JX Teng, JY Tian, WH Tian, Y Tian, ZF Tian, I Uman, B Wang, B Wang, Bo Wang, C Wang, Cong Wang, DY Wang, HJ Wang, JJ Wang, K Wang, LL Wang, LW Wang, M Wang, M Wang, NY Wang, S Wang, T Wang, TJ Wang, W Wang, Wei Wang, WP Wang, X Wang, XF Wang, XJ Wang, XL Wang, XN Wang, Y Wang, YD Wang, YF Wang, YH Wang, YL Wang, YN Wang, YQ Wang, Yaqian Wang, Yi Wang, Yuan Wang, Z Wang, ZL Wang, ZQ Wang, ZY Wang, DH Wei, HR Wei, F Weidner, SP Wen, YR Wen, U Wiedner, G Wilkinson, M Wolke, C Wu, JF Wu, LH Wu, LJ Wu, Lianjie Wu, SG Wu, SM Wu, X Wu, XH Wu, YJ Wu, Z Wu, L Xia, XM Xian, BH Xiang, T Xiang, D Xiao, GY Xiao, H Xiao, YL Xiao, ZJ Xiao, C Xie, KJ Xie, XH Xie, Y Xie, YG Xie, YH Xie, ZP Xie, TY Xing, CF Xu, CJ Xu, GF Xu, HY Xu, HY Xu, M Xu, QJ Xu, QN Xu, WL Xu, XP Xu, Y Xu, Y Xu, YC Xu, ZS Xu, HY Yan, L Yan, WB Yan, WC Yan, WP Yan, XQ Yan, HJ Yang, HL Yang, HX Yang, JH Yang, RJ Yang, T Yang, Y Yang, YF Yang, YH Yang, YQ Yang, YX Yang, YZ Yang, M Ye, MH Ye, Junhao Yin, ZY You, BX Yu, CX Yu, G Yu, JS Yu, MC Yu, T Yu, XD Yu, YC Yu, CZ Yuan, H Yuan, J Yuan, J Yuan, L Yuan, SC Yuan, Y Yuan, ZY Yuan, CX Yue, Ying Yue, AA Zafar, SH Zeng, X Zeng, Y Zeng, Yujie Zeng, YJ Zeng, XY Zhai, YH Zhan, AQ Zhang, BL Zhang, BX Zhang, DH Zhang, GY Zhang, GY Zhang, H Zhang, H Zhang, HC Zhang, HH Zhang, HQ Zhang, HR Zhang, HY Zhang, Jin Zhang, J Zhang, JJ Zhang, JL Zhang, JQ Zhang, JS Zhang, JW Zhang, JX Zhang, JY Zhang, JZ Zhang, Jianyu Zhang, LM Zhang, Lei Zhang, N Zhang, P Zhang, Q Zhang, QY Zhang, RY Zhang, SH Zhang, Shulei Zhang, XM Zhang, XY Zhang, XY Zhang, Y Zhang, Y Zhang, YT Zhang, YH Zhang, YM Zhang, ZD Zhang, ZH Zhang, ZL Zhang, ZL Zhang, ZX Zhang, ZY Zhang, ZY Zhang, ZZ Zhang, Zh Zh Zhang, G Zhao, JY Zhao, JZ Zhao, L Zhao, Lei Zhao, MG Zhao, N Zhao, RP Zhao, SJ Zhao, YB Zhao, YL Zhao, YX Zhao, ZG Zhao, A Zhemchugov, B Zheng, BM Zheng, JP Zheng, WJ Zheng, XR Zheng, YH Zheng, B Zhong, X Zhong, H Zhou, JQ Zhou, JY Zhou, S Zhou, X Zhou, XK Zhou, XR Zhou, XY Zhou, YZ Zhou, ZC Zhou, AN Zhu, J Zhu, K Zhu, KJ Zhu, KS Zhu, L Zhu, LX Zhu, SH Zhu, TJ Zhu, WD Zhu, WD Zhu, WJ Zhu, WZ Zhu, YC Zhu, ZA Zhu, XY Zhuang, JH Zou, J Zu

Abstract:

Using (2712.4 ± 14.3) × 106ψ(3686) candidates collected by the BESIII detector operating at the BEPCII storage ring, the decays χcJJ=012→pp¯ηη$$ {\chi}_{cJ}\left(J=0,1,2\right)\to p\overline{p}\eta \eta $$ are observed for the first time through the radiative transition ψ(3686) → γχcJ. The statistical significances for χcJ signals are all larger than 5σ. The branching fractions of χc0,1,2→pp¯ηη$$ {\chi}_{c0,1,2}\to p\overline{p}\eta \eta $$ are determined to be (5.75 ± 0.59 ± 0.42) × 10−5, (1.40 ± 0.33 ± 0.17) × 10−5, and (2.64 ± 0.40 ± 0.27) × 10−5, respectively, where the first uncertainties are statistical and the second systematic. No evident resonant structures are found in the pp¯$$ p\overline{p} $$ and pη/p¯η$$ p\eta /\overline{p}\eta $$ systems.

Amplitude analysis of ψ3686→γKS0KS0

Journal of High Energy Physics Springer Nature 2025:10 (2025) 81

Authors:

M Ablikim, MN Achasov, P Adlarson, XC Ai, R Aliberti, A Amoroso, Q An, Y Bai, O Bakina, Y Ban, H-R Bao, V Batozskaya, K Begzsuren, N Berger, M Berlowski, M Bertani, D Bettoni, F Bianchi, E Bianco, A Bortone, I Boyko, RA Briere, A Brueggemann, H Cai, MH Cai, X Cai, A Calcaterra, GF Cao, N Cao, SA Cetin, XY Chai, JF Chang, GR Che, YZ Che, G Chelkov, CH Chen, Chao Chen, G Chen, HS Chen, HY Chen, ML Chen, SJ Chen, SL Chen, SM Chen, T Chen, XR Chen, XT Chen, XY Chen, YB Chen, YQ Chen, YQ Chen, ZJ Chen, ZK Chen, SK Choi, X Chu, G Cibinetto, F Cossio, J Cottee-Meldrum, JJ Cui, HL Dai, JP Dai, A Dbeyssi, RE de Boer, D Dedovich, CQ Deng, ZY Deng, A Denig, I Denysenko, M Destefanis, F De Mori, B Ding, XX Ding, Y Ding, Y Ding, YX Ding, J Dong, LY Dong, MY Dong, X Dong, MC Du, SX Du, SX Du, YY Duan, ZH Duan, P Egorov, GF Fan, JJ Fan, YH Fan, J Fang, J Fang, SS Fang, WX Fang, YQ Fang, R Farinelli, L Fava, F Feldbauer, G Felici, CQ Feng, JH Feng, L Feng, QX Feng, YT Feng, M Fritsch, CD Fu, JL Fu, YW Fu, H Gao, XB Gao, Y Gao, YN Gao, YN Gao, YY Gao, S Garbolino, I Garzia, PT Ge, ZW Ge, C Geng, EM Gersabeck, A Gilman, K Goetzen, JD Gong, L Gong, WX Gong, W Gradl, S Gramigna, M Greco, MH Gu, YT Gu, CY Guan, AQ Guo, LB Guo, MJ Guo, RP Guo, YP Guo, A Guskov, J Gutierrez, KL Han, TT Han, F Hanisch, KD Hao, XQ Hao, FA Harris, KK He, KL He, FH Heinsius, CH Heinz, YK Heng, C Herold, T Holtmann, PC Hong, GY Hou, XT Hou, YR Hou, ZL Hou, HM Hu, JF Hu, QP Hu, SL Hu, T Hu, Y Hu, ZM Hu, GS Huang, KX Huang, LQ Huang, P Huang, XT Huang, YP Huang, YS Huang, T Hussain, N Hüsken, N in der Wiesche, J Jackson, Q Ji, QP Ji, W Ji, XB Ji, XL Ji, YY Ji, ZK Jia, D Jiang, HB Jiang, PC Jiang, SJ Jiang, TJ Jiang, XS Jiang, Y Jiang, JB Jiao, JK Jiao, Z Jiao, S Jin, Y Jin, MQ Jing, XM Jing, T Johansson, S Kabana, N Kalantar-Nayestanaki, XL Kang, XS Kang, M Kavatsyuk, BC Ke, V Khachatryan, A Khoukaz, R Kiuchi, OB Kolcu, B Kopf, M Kuessner, X Kui, N Kumar, A Kupsc, W Kühn, Q Lan, WN Lan, TT Lei, M Lellmann, T Lenz, C Li, C Li, C Li, CH Li, CK Li, DM Li, F Li, G Li, HB Li, HJ Li, HN Li, Hui Li, JR Li, JS Li, K Li, KL Li, KL Li, LJ Li, Lei Li, MH Li, MR Li, PL Li, PR Li, QM Li, QX Li, R Li, SX Li, T Li, TY Li, WD Li, WG Li, X Li, XH Li, XL Li, XY Li, XZ Li, Y Li, YG Li, YP Li, ZJ Li, ZY Li, C Liang, H Liang, YF Liang, YT Liang, GR Liao, LB Liao, MH Liao, YP Liao, J Libby, A Limphirat, CC Lin, CX Lin, DX Lin, LQ Lin, T Lin, BJ Liu, BX Liu, C Liu, CX Liu, F Liu, FH Liu, Feng Liu, GM Liu, H Liu, HB Liu, HH Liu, HM Liu, Huihui Liu, JB Liu, JJ Liu, K Liu, K Liu, KY Liu, Ke Liu, L Liu, LC Liu, Lu Liu, MH Liu, PL Liu, Q Liu, SB Liu, T Liu, WK Liu, WM Liu, WT Liu, X Liu, X Liu, XK Liu, XY Liu, Y Liu, Y Liu, Yuan Liu, YB Liu, ZA Liu, ZD Liu, ZQ Liu, XC Lou, FX Lu, HJ Lu, JG Lu, XL Lu, Y Lu, YH Lu, YP Lu, ZH Lu, CL Luo, JR Luo, JS Luo, MX Luo, T Luo, XL Luo, ZY Lv, XR Lyu, YF Lyu, YH Lyu, FC Ma, H Ma, HL Ma, JL Ma, LL Ma, LR Ma, QM Ma, RQ Ma, RY Ma, T Ma, XT Ma, XY Ma, YM Ma, FE Maas, I MacKay, M Maggiora, S Malde, QA Malik, HX Mao, YJ Mao, ZP Mao, S Marcello, A Marshall, FM Melendi, YH Meng, ZX Meng, JG Messchendorp, G Mezzadri, H Miao, TJ Min, RE Mitchell, XH Mo, B Moses, N Yu Muchnoi, J Muskalla, Y Nefedov, F Nerling, LS Nie, IB Nikolaev, Z Ning, S Nisar, QL Niu, WD Niu, C Normand, SL Olsen, Q Ouyang, S Pacetti, X Pan, Y Pan, A Pathak, YP Pei, M Pelizaeus, HP Peng, XJ Peng, YY Peng, K Peters, K Petridis, JL Ping, RG Ping, S Plura, V Prasad, FZ Qi, HR Qi, M Qi, S Qian, WB Qian, CF Qiao, JH Qiao, JJ Qin, JL Qin, LQ Qin, LY Qin, PB Qin, XP Qin, XS Qin, ZH Qin, JF Qiu, ZH Qu, J Rademacker, CF Redmer, A Rivetti, M Rolo, G Rong, SS Rong, F Rosini, Ch Rosner, MQ Ruan, N Salone, A Sarantsev, Y Schelhaas, K Schoenning, M Scodeggio, KY Shan, W Shan, XY Shan, ZJ Shang, JF Shangguan, LG Shao, M Shao, CP Shen, HF Shen, WH Shen, XY Shen, BA Shi, H Shi, JL Shi, JY Shi, SY Shi, X Shi, HL Song, JJ Song, TZ Song, WM Song, YJ Song, YX Song, S Sosio, S Spataro, F Stieler, SS Su, YJ Su, GB Sun, GX Sun, H Sun, HK Sun, JF Sun, K Sun, L Sun, SS Sun, T Sun, YC Sun, YH Sun, YJ Sun, YZ Sun, ZQ Sun, ZT Sun, CJ Tang, GY Tang, J Tang, JJ Tang, LF Tang, YA Tang, LY Tao, M Tat, JX Teng, JY Tian, WH Tian, Y Tian, ZF Tian, I Uman, B Wang, B Wang, Bo Wang, C Wang, C Wang, Cong Wang, DY Wang, HJ Wang, JJ Wang, K Wang, LL Wang, LW Wang, M Wang, M Wang, NY Wang, S Wang, T Wang, TJ Wang, W Wang, Wei Wang, WP Wang, X Wang, XF Wang, XJ Wang, XL Wang, XN Wang, Y Wang, YD Wang, YF Wang, YH Wang, YJ Wang, YL Wang, YN Wang, YQ Wang, Yaqian Wang, Yi Wang, Yuan Wang, Z Wang, ZL Wang, ZL Wang, ZQ Wang, ZY Wang, DH Wei, HR Wei, F Weidner, SP Wen, YR Wen, U Wiedner, G Wilkinson, M Wolke, C Wu, JF Wu, LH Wu, LJ Wu, LJ Wu, Lianjie Wu, SG Wu, SM Wu, X Wu, XH Wu, YJ Wu, Z Wu, L Xia, XM Xian, BH Xiang, D Xiao, GY Xiao, H Xiao, YL Xiao, ZJ Xiao, C Xie, KJ Xie, XH Xie, Y Xie, YG Xie, YH Xie, ZP Xie, TY Xing, CF Xu, CJ Xu, GF Xu, HY Xu, HY Xu, M Xu, QJ Xu, QN Xu, TD Xu, W Xu, WL Xu, XP Xu, Y Xu, Y Xu, YC Xu, ZS Xu, F Yan, HY Yan, L Yan, WB Yan, WC Yan, WH Yan, WP Yan, XQ Yan, HJ Yang, HL Yang, HX Yang, JH Yang, RJ Yang, T Yang, Y Yang, YF Yang, YH Yang, YQ Yang, YX Yang, YZ Yang, M Ye, MH Ye, ZJ Ye, Junhao Yin, ZY You, BX Yu, CX Yu, G Yu, JS Yu, LQ Yu, MC Yu, T Yu, XD Yu, YC Yu, CZ Yuan, H Yuan, J Yuan, J Yuan, L Yuan, SC Yuan, XQ Yuan, Y Yuan, ZY Yuan, CX Yue, Ying Yue, AA Zafar, SH Zeng, X Zeng, Y Zeng, Yujie Zeng, YJ Zeng, XY Zhai, YH Zhan, AQ Zhang, BL Zhang, BX Zhang, DH Zhang, GY Zhang, GY Zhang, H Zhang, H Zhang, HC Zhang, HH Zhang, HQ Zhang, HR Zhang, HY Zhang, Jin Zhang, J Zhang, JJ Zhang, JL Zhang, JQ Zhang, JS Zhang, JW Zhang, JX Zhang, JY Zhang, JZ Zhang, Jianyu Zhang, LM Zhang, Lei Zhang, N Zhang, P Zhang, Q Zhang, QY Zhang, RY Zhang, SH Zhang, Shulei Zhang, XM Zhang, XY Zhang, XY Zhang, Y Zhang, Y Zhang, YT Zhang, YH Zhang, YM Zhang, YP Zhang, ZD Zhang, ZH Zhang, ZL Zhang, ZL Zhang, ZX Zhang, ZY Zhang, ZY Zhang, ZZ Zhang, Zh Zh Zhang, G Zhao, JY Zhao, JZ Zhao, L Zhao, L Zhao, MG Zhao, N Zhao, RP Zhao, SJ Zhao, YB Zhao, YL Zhao, YX Zhao, ZG Zhao, A Zhemchugov, B Zheng, BM Zheng, JP Zheng, WJ Zheng, XR Zheng, YH Zheng, B Zhong, C Zhong, H Zhou, JQ Zhou, JY Zhou, S Zhou, X Zhou, XK Zhou, XR Zhou, XY Zhou, YX Zhou, YZ Zhou, AN Zhu, J Zhu, K Zhu, KJ Zhu, KS Zhu, L Zhu, LX Zhu, SH Zhu, TJ Zhu, WD Zhu, WD Zhu, WJ Zhu, WZ Zhu, YC Zhu, ZA Zhu, XY Zhuang, JH Zou, J Zu

Abstract:

Using (2712 ± 14) × 106ψ(3686) events collected with the BESIII detector, we perform the first amplitude analysis of the radiative decay ψ3686→γKS0KS0$$ \psi (3686)\to \gamma {K}_S^0{K}_S^0 $$ within the mass region MKS0KS0<2.8$$ {M}_{K_S^0{K}_S^0}<2.8 $$ GeV/c2. Employing a one-channel K-matrix approach for the description of the dynamics of the KS0KS0$$ {K}_S^0{K}_S^0 $$ system, the data sample is well described with four poles for the f0-wave and three poles for the f2-wave. The determined pole positions are consistent with those of well-established resonance states. The observed f0 and f2 states are found to be in agreement with those produced in radiative J/ψ decays. The production behaviors of f0 and f2 poles in ψ3686→γKS0KS0$$ \psi (3686)\to \gamma {K}_S^0{K}_S^0 $$ are qualified with their residues and the converted branching fractions. By comparing with J/ψ→γKS0KS0$$ J/\psi \to \gamma {K}_S^0{K}_S^0 $$ decay, the ratios Bψ3686→γf0,2BJ/ψ→γf0,2$$ \frac{\mathcal{B}\left(\psi (3686)\to \gamma {f}_{0,2}\right)}{\mathcal{B}\left(J/\psi \to \gamma {f}_{0,2}\right)} $$ are determined, which provides crucial experimental inputs on the internal structure of the f0,2 states, especially their potential mixing with glueball components.