Isospin Amplitudes in Λ_{b}^{0}→J/ψΛ(Σ^{0}) and Ξ_{b}^{0}→J/ψΞ^{0}(Λ) Decays.
Physical review letters 124:11 (2020) 111802
Authors:
R Aaij, C Abellán Beteta, T Ackernley, B Adeva, M Adinolfi, H Afsharnia, CA Aidala, S Aiola, Z Ajaltouni, S Akar, P Albicocco, J Albrecht, F Alessio, M Alexander, A Alfonso Albero, G Alkhazov, P Alvarez Cartelle, AA Alves, S Amato, Y Amhis, L An, L Anderlini, G Andreassi, M Andreotti, F Archilli, J Arnau Romeu, A Artamonov, M Artuso, K Arzymatov, E Aslanides, M Atzeni, B Audurier, S Bachmann, JJ Back, S Baker, V Balagura, W Baldini, A Baranov, RJ Barlow, S Barsuk, W Barter, M Bartolini, F Baryshnikov, G Bassi, V Batozskaya, B Batsukh, A Battig, A Bay, M Becker, F Bedeschi, I Bediaga, A Beiter, LJ Bel, V Belavin, S Belin, N Beliy, V Bellee, K Belous, I Belyaev, G Bencivenni, E Ben-Haim, S Benson, S Beranek, A Berezhnoy, R Bernet, D Berninghoff, HC Bernstein, C Bertella, E Bertholet, A Bertolin, C Betancourt, F Betti, MO Bettler, Ia Bezshyiko, S Bhasin, J Bhom, MS Bieker, S Bifani, P Billoir, A Bizzeti, M Bjørn, MP Blago, T Blake, F Blanc, S Blusk, D Bobulska, V Bocci, O Boente Garcia, T Boettcher, A Boldyrev, A Bondar, N Bondar, S Borghi, M Borisyak, M Borsato, JT Borsuk, TJV Bowcock, C Bozzi, MJ Bradley, S Braun, A Brea Rodriguez, M Brodski, J Brodzicka, A Brossa Gonzalo, D Brundu, E Buchanan, A Buonaura, C Burr, A Bursche, JS Butter, J Buytaert, W Byczynski, S Cadeddu, H Cai, R Calabrese, L Calero Diaz, S Cali, R Calladine, M Calvi, M Calvo Gomez, P Camargo Magalhaes, A Camboni, P Campana, DH Campora Perez, L Capriotti, A Carbone, G Carboni, R Cardinale, A Cardini, P Carniti, K Carvalho Akiba, A Casais Vidal, G Casse, M Cattaneo, G Cavallero, S Celani, R Cenci, J Cerasoli, MG Chapman, M Charles, Ph Charpentier, G Chatzikonstantinidis, M Chefdeville, V Chekalina, C Chen, S Chen, A Chernov, S-G Chitic, V Chobanova, M Chrzaszcz, A Chubykin, P Ciambrone, MF Cicala, X Cid Vidal, G Ciezarek, F Cindolo, PEL Clarke, M Clemencic, HV Cliff, J Closier, JL Cobbledick, V Coco, JAB Coelho, J Cogan, E Cogneras, L Cojocariu, P Collins, T Colombo, A Comerma-Montells, A Contu, N Cooke, G Coombs, S Coquereau, G Corti, CM Costa Sobral, B Couturier, DC Craik, J Crkovska, A Crocombe, M Cruz Torres, R Currie, CL Da Silva, E Dall'Occo, J Dalseno, C D'Ambrosio, A Danilina, P d'Argent, A Davis, O De Aguiar Francisco, K De Bruyn, S De Capua, M De Cian, JM De Miranda, L De Paula, M De Serio, P De Simone, JA de Vries, CT Dean, W Dean, D Decamp, L Del Buono, B Delaney, H-P Dembinski, M Demmer, A Dendek, V Denysenko, D Derkach, O Deschamps, F Desse, F Dettori, B Dey, A Di Canto, P Di Nezza, S Didenko, H Dijkstra, V Dobishuk, F Dordei, M Dorigo, AC Dos Reis, L Douglas, A Dovbnya, K Dreimanis, MW Dudek, L Dufour, G Dujany, P Durante, JM Durham, D Dutta, M Dziewiecki, A Dziurda, A Dzyuba, S Easo, U Egede, V Egorychev, S Eidelman, S Eisenhardt, R Ekelhof, S Ek-In, L Eklund, S Ely, A Ene, E Epple, S Escher, S Esen, T Evans, A Falabella, J Fan, N Farley, S Farry, D Fazzini, P Fedin, M Féo, P Fernandez Declara, A Fernandez Prieto, F Ferrari, L Ferreira Lopes, F Ferreira Rodrigues, S Ferreres Sole, M Ferrillo, M Ferro-Luzzi, S Filippov, RA Fini, M Fiorini, M Firlej, KM Fischer, C Fitzpatrick, T Fiutowski, F Fleuret, M Fontana, F Fontanelli, R Forty, V Franco Lima, M Franco Sevilla, M Frank, C Frei, DA Friday, J Fu, M Fuehring, W Funk, E Gabriel, A Gallas Torreira, D Galli, S Gallorini, S Gambetta, Y Gan, M Gandelman, P Gandini, Y Gao, LM Garcia Martin, J García Pardiñas, B Garcia Plana, FA Garcia Rosales, J Garra Tico, L Garrido, D Gascon, C Gaspar, D Gerick, E Gersabeck, M Gersabeck, T Gershon, D Gerstel, Ph Ghez, V Gibson, A Gioventù, OG Girard, P Gironella Gironell, L Giubega, C Giugliano, K Gizdov, VV Gligorov, C Göbel, D Golubkov, A Golutvin, A Gomes, P Gorbounov, IV Gorelov, C Gotti, E Govorkova, JP Grabowski, R Graciani Diaz, T Grammatico, LA Granado Cardoso, E Graugés, E Graverini, G Graziani, A Grecu, R Greim, P Griffith, L Grillo, L Gruber, BR Gruberg Cazon, C Gu, E Gushchin, A Guth, Yu Guz, T Gys, P Günther, T Hadavizadeh, G Haefeli, C Haen, SC Haines, PM Hamilton, Q Han, X Han, TH Hancock, S Hansmann-Menzemer, N Harnew, T Harrison, R Hart, C Hasse, M Hatch, J He, M Hecker, K Heijhoff, K Heinicke, A Heister, AM Hennequin, K Hennessy, L Henry, J Heuel, A Hicheur, D Hill, M Hilton, PH Hopchev, J Hu, W Hu, W Huang, W Hulsbergen, T Humair, RJ Hunter, M Hushchyn, D Hutchcroft, D Hynds, P Ibis, M Idzik, P Ilten, A Inglessi, A Inyakin, K Ivshin, R Jacobsson, S Jakobsen, E Jans, BK Jashal, A Jawahery, V Jevtic, F Jiang, M John, D Johnson, CR Jones, B Jost, N Jurik, S Kandybei, M Karacson, JM Kariuki, N Kazeev, M Kecke, F Keizer, M Kelsey, M Kenzie, T Ketel, B Khanji, A Kharisova, KE Kim, T Kirn, VS Kirsebom, S Klaver, K Klimaszewski, S Koliiev, A Kondybayeva, A Konoplyannikov, P Kopciewicz, R Kopecna, P Koppenburg, I Kostiuk, O Kot, S Kotriakhova, L Kravchuk, RD Krawczyk, M Kreps, F Kress, S Kretzschmar, P Krokovny, W Krupa, W Krzemien, W Kucewicz, M Kucharczyk, V Kudryavtsev, HS Kuindersma, GJ Kunde, T Kvaratskheliya, D Lacarrere, G Lafferty, A Lai, D Lancierini, JJ Lane, G Lanfranchi, C Langenbruch, O Lantwin, T Latham, F Lazzari, C Lazzeroni, R Le Gac, R Lefèvre, A Leflat, O Leroy, T Lesiak, B Leverington, H Li, X Li, Y Li, Z Li, X Liang, R Lindner, V Lisovskyi, G Liu, X Liu, D Loh, A Loi, J Lomba Castro, I Longstaff, JH Lopes, G Loustau, GH Lovell, Y Lu, D Lucchesi, M Lucio Martinez, Y Luo, A Lupato, E Luppi, O Lupton, A Lusiani, X Lyu, S Maccolini, F Machefert, F Maciuc, V Macko, P Mackowiak, S Maddrell-Mander, LR Madhan Mohan, O Maev, A Maevskiy, D Maisuzenko, MW Majewski, S Malde, B Malecki, A Malinin, T Maltsev, H Malygina, G Manca, G Mancinelli, R Manera Escalero, D Manuzzi, D Marangotto, J Maratas, JF Marchand, U Marconi, S Mariani, C Marin Benito, M Marinangeli, P Marino, J Marks, PJ Marshall, G Martellotti, L Martinazzoli, M Martinelli, D Martinez Santos, F Martinez Vidal, A Massafferri, M Materok, R Matev, A Mathad, Z Mathe, V Matiunin, C Matteuzzi, KR Mattioli, A Mauri, E Maurice, M McCann, L Mcconnell, A McNab, R McNulty, JV Mead, B Meadows, C Meaux, G Meier, N Meinert, D Melnychuk, S Meloni, M Merk, A Merli, M Mikhasenko, DA Milanes, E Millard, M-N Minard, O Mineev, L Minzoni, SE Mitchell, B Mitreska, DS Mitzel, A Mödden, A Mogini, RD Moise, T Mombächer, IA Monroy, S Monteil, M Morandin, G Morello, MJ Morello, J Moron, AB Morris, AG Morris, R Mountain, H Mu, F Muheim, M Mukherjee, M Mulder, D Müller, K Müller, V Müller, CH Murphy, D Murray, P Muzzetto, P Naik, T Nakada, R Nandakumar, A Nandi, T Nanut, I Nasteva, M Needham, N Neri, S Neubert, N Neufeld, R Newcombe, TD Nguyen, C Nguyen-Mau, EM Niel, S Nieswand, N Nikitin, NS Nolte, C Nunez, A Oblakowska-Mucha, V Obraztsov, S Ogilvy, DP O'Hanlon, R Oldeman, CJG Onderwater, JD Osborn, A Ossowska, JM Otalora Goicochea, T Ovsiannikova, P Owen, A Oyanguren, PR Pais, T Pajero, A Palano, M Palutan, G Panshin, A Papanestis, M Pappagallo, LL Pappalardo, C Pappenheimer, W Parker, C Parkes, G Passaleva, A Pastore, M Patel, C Patrignani, A Pearce, A Pellegrino, M Pepe Altarelli, S Perazzini, D Pereima, P Perret, L Pescatore, K Petridis, A Petrolini, A Petrov, S Petrucci, M Petruzzo, B Pietrzyk, G Pietrzyk, M Pili, D Pinci, J Pinzino, F Pisani, A Piucci, V Placinta, S Playfer, J Plews, M Plo Casasus, F Polci, M Poli Lener, M Poliakova, A Poluektov, N Polukhina, I Polyakov, E Polycarpo, GJ Pomery, S Ponce, A Popov, D Popov, S Poslavskii, K Prasanth, L Promberger, C Prouve, V Pugatch, A Puig Navarro, H Pullen, G Punzi, W Qian, J Qin, R Quagliani, B Quintana, NV Raab, RI Rabadan Trejo, B Rachwal, JH Rademacker, M Rama, M Ramos Pernas, MS Rangel, F Ratnikov, G Raven, M Reboud, F Redi, F Reiss, C Remon Alepuz, Z Ren, V Renaudin, S Ricciardi, S Richards, K Rinnert, P Robbe, A Robert, AB Rodrigues, E Rodrigues, JA Rodriguez Lopez, M Roehrken, S Roiser, A Rollings, V Romanovskiy, M Romero Lamas, A Romero Vidal, JD Roth, M Rotondo, MS Rudolph, T Ruf, J Ruiz Vidal, J Ryzka, JJ Saborido Silva, N Sagidova, B Saitta, C Sanchez Gras, C Sanchez Mayordomo, R Santacesaria, C Santamarina Rios, M Santimaria, E Santovetti, G Sarpis, A Sarti, C Satriano, A Satta, M Saur, D Savrina, LG Scantlebury Smead, S Schael, M Schellenberg, M Schiller, H Schindler, M Schmelling, T Schmelzer, B Schmidt, O Schneider, A Schopper, HF Schreiner, M Schubiger, S Schulte, MH Schune, R Schwemmer, B Sciascia, A Sciubba, S Sellam, A Semennikov, A Sergi, N Serra, J Serrano, L Sestini, A Seuthe, P Seyfert, DM Shangase, M Shapkin, L Shchutska, T Shears, L Shekhtman, V Shevchenko, E Shmanin, JD Shupperd, BG Siddi, R Silva Coutinho, L Silva de Oliveira, G Simi, S Simone, I Skiba, N Skidmore, T Skwarnicki, MW Slater, JG Smeaton, A Smetkina, E Smith, IT Smith, M Smith, A Snoch, M Soares, L Soares Lavra, MD Sokoloff, FJP Soler, B Souza De Paula, B Spaan, E Spadaro Norella, P Spradlin, F Stagni, M Stahl, S Stahl, P Stefko, O Steinkamp, S Stemmle, O Stenyakin, M Stepanova, H Stevens, S Stone, S Stracka, ME Stramaglia, M Straticiuc, S Strokov, J Sun, L Sun, Y Sun, P Svihra, K Swientek, A Szabelski, T Szumlak, M Szymanski, S Taneja, Z Tang, T Tekampe, G Tellarini, F Teubert, E Thomas, KA Thomson, MJ Tilley, V Tisserand, S T'Jampens, M Tobin, S Tolk, L Tomassetti, D Tonelli, D Torres Machado, DY Tou, E Tournefier, M Traill, MT Tran, C Trippl, A Trisovic, A Tsaregorodtsev, G Tuci, A Tully, N Tuning, A Ukleja, A Usachov, A Ustyuzhanin, U Uwer, A Vagner, V Vagnoni, A Valassi, G Valenti, M van Beuzekom, H Van Hecke, E van Herwijnen, CB Van Hulse, M van Veghel, R Vazquez Gomez, P Vazquez Regueiro, C Vázquez Sierra, S Vecchi, JJ Velthuis, M Veltri, A Venkateswaran, M Vernet, M Veronesi, M Vesterinen, JV Viana Barbosa, D Vieira, M Vieites Diaz, H Viemann, X Vilasis-Cardona, A Vitkovskiy, V Volkov, A Vollhardt, D Vom Bruch, A Vorobyev, V Vorobyev, N Voropaev, R Waldi, J Walsh, J Wang, J Wang, J Wang, M Wang, Y Wang, Z Wang, DR Ward, HM Wark, NK Watson, D Websdale, A Weiden, C Weisser, BDC Westhenry, DJ White, M Whitehead, D Wiedner, G Wilkinson, M Wilkinson, I Williams, M Williams, MRJ Williams, T Williams, FF Wilson, W Wislicki, M Witek, L Witola, G Wormser, SA Wotton, H Wu, K Wyllie, Z Xiang, D Xiao, Y Xie, H Xing, A Xu, L Xu, M Xu, Q Xu, Z Xu, Z Xu, Z Yang, Z Yang, Y Yao, LE Yeomans, H Yin, J Yu, X Yuan, O Yushchenko, KA Zarebski, M Zavertyaev, M Zdybal, M Zeng, D Zhang, L Zhang, S Zhang, WC Zhang, Y Zhang, A Zhelezov, Y Zheng, X Zhou, Y Zhou, X Zhu, V Zhukov, JB Zonneveld, S Zucchelli, LHCb CollaborationAbstract:
Ratios of isospin amplitudes in hadron decays are a useful probe of the interplay between weak and strong interactions and allow searches for physics beyond the standard model. We present the first results on isospin amplitudes in b-baryon decays, using data corresponding to an integrated luminosity of 8.5 fb^{-1}, collected with the LHCb detector in pp collisions at center of mass energies of 7, 8, and 13 TeV. The isospin amplitude ratio |A_{1}(Λ_{b}^{0}→J/ψΣ^{0})/A_{0}(Λ_{b}^{0}→J/ψΛ)|, where the subscript on A indicates the final-state isospin, is measured to be less than 1/21.8 at 95% confidence level. The Cabibbo suppressed Ξ_{b}^{0}→J/ψΛ decay is observed for the first time, allowing for the measurement |A_{0}(Ξ_{b}^{0}→J/ψΛ)/A_{1/2}(Ξ_{b}^{0}→J/ψΞ^{0})|=0.37±0.06±0.02, where the uncertainties are statistical and systematic, respectively.Measurement of f_{s}/f_{u} Variation with Proton-Proton Collision Energy and B-Meson Kinematics.
Physical review letters 124:12 (2020) 122002
Authors:
R Aaij, C Abellán Beteta, B Adeva, M Adinolfi, CA Aidala, Z Ajaltouni, S Akar, P Albicocco, J Albrecht, F Alessio, M Alexander, A Alfonso Albero, G Alkhazov, P Alvarez Cartelle, AA Alves, S Amato, Y Amhis, L An, L Anderlini, G Andreassi, M Andreotti, JE Andrews, F Archilli, J Arnau Romeu, A Artamonov, M Artuso, K Arzymatov, E Aslanides, M Atzeni, B Audurier, S Bachmann, JJ Back, S Baker, V Balagura, W Baldini, A Baranov, RJ Barlow, S Barsuk, W Barter, M Bartolini, F Baryshnikov, V Batozskaya, B Batsukh, A Battig, V Battista, A Bay, F Bedeschi, I Bediaga, A Beiter, LJ Bel, V Belavin, S Belin, N Beliy, V Bellee, K Belous, I Belyaev, G Bencivenni, E Ben-Haim, S Benson, S Beranek, A Berezhnoy, R Bernet, D Berninghoff, HC Bernstein, E Bertholet, A Bertolin, C Betancourt, F Betti, MO Bettler, Ia Bezshyiko, S Bhasin, J Bhom, MS Bieker, S Bifani, P Billoir, A Birnkraut, A Bizzeti, M Bjørn, MP Blago, T Blake, F Blanc, S Blusk, D Bobulska, V Bocci, O Boente Garcia, T Boettcher, A Boldyrev, A Bondar, N Bondar, S Borghi, M Borisyak, M Borsato, M Boubdir, TJV Bowcock, C Bozzi, S Braun, A Brea Rodriguez, M Brodski, J Brodzicka, A Brossa Gonzalo, D Brundu, E Buchanan, A Buonaura, C Burr, A Bursche, JS Butter, J Buytaert, W Byczynski, S Cadeddu, H Cai, R Calabrese, S Cali, R Calladine, M Calvi, M Calvo Gomez, A Camboni, P Campana, DH Campora Perez, L Capriotti, A Carbone, G Carboni, R Cardinale, A Cardini, P Carniti, K Carvalho Akiba, A Casais Vidal, G Casse, M Cattaneo, G Cavallero, R Cenci, MG Chapman, M Charles, Ph Charpentier, G Chatzikonstantinidis, M Chefdeville, V Chekalina, C Chen, S Chen, S-G Chitic, V Chobanova, M Chrzaszcz, A Chubykin, P Ciambrone, X Cid Vidal, G Ciezarek, F Cindolo, PEL Clarke, M Clemencic, HV Cliff, J Closier, JL Cobbledick, V Coco, JAB Coelho, J Cogan, E Cogneras, L Cojocariu, P Collins, T Colombo, A Comerma-Montells, A Contu, N Cooke, G Coombs, S Coquereau, G Corti, CM Costa Sobral, B Couturier, GA Cowan, DC Craik, A Crocombe, M Cruz Torres, R Currie, CL Da Silva, E Dall'Occo, J Dalseno, C D'Ambrosio, A Danilina, P d'Argent, A Davis, O De Aguiar Francisco, K De Bruyn, S De Capua, M De Cian, JM De Miranda, L De Paula, M De Serio, P De Simone, JA de Vries, CT Dean, W Dean, D Decamp, L Del Buono, B Delaney, H-P Dembinski, M Demmer, A Dendek, V Denysenko, D Derkach, O Deschamps, F Desse, F Dettori, B Dey, A Di Canto, P Di Nezza, S Didenko, H Dijkstra, F Dordei, M Dorigo, AC Dos Reis, A Dosil Suárez, L Douglas, A Dovbnya, K Dreimanis, L Dufour, G Dujany, P Durante, JM Durham, D Dutta, R Dzhelyadin, M Dziewiecki, A Dziurda, A Dzyuba, S Easo, U Egede, V Egorychev, S Eidelman, S Eisenhardt, U Eitschberger, R Ekelhof, S Ek-In, L Eklund, S Ely, A Ene, S Escher, S Esen, T Evans, A Falabella, C Färber, N Farley, S Farry, D Fazzini, M Féo, P Fernandez Declara, A Fernandez Prieto, F Ferrari, L Ferreira Lopes, F Ferreira Rodrigues, S Ferreres Sole, M Ferro-Luzzi, S Filippov, RA Fini, M Fiorini, M Firlej, C Fitzpatrick, T Fiutowski, F Fleuret, M Fontana, F Fontanelli, R Forty, V Franco Lima, M Franco Sevilla, M Frank, C Frei, J Fu, W Funk, E Gabriel, A Gallas Torreira, D Galli, S Gallorini, S Gambetta, Y Gan, M Gandelman, P Gandini, Y Gao, LM Garcia Martin, J García Pardiñas, B Garcia Plana, J Garra Tico, L Garrido, D Gascon, C Gaspar, G Gazzoni, D Gerick, E Gersabeck, M Gersabeck, T Gershon, D Gerstel, Ph Ghez, V Gibson, A Gioventù, OG Girard, P Gironella Gironell, L Giubega, K Gizdov, VV Gligorov, C Göbel, D Golubkov, A Golutvin, A Gomes, IV Gorelov, C Gotti, E Govorkova, JP Grabowski, R Graciani Diaz, LA Granado Cardoso, E Graugés, E Graverini, G Graziani, A Grecu, R Greim, P Griffith, L Grillo, L Gruber, BR Gruberg Cazon, C Gu, E Gushchin, A Guth, Yu Guz, T Gys, T Hadavizadeh, C Hadjivasiliou, G Haefeli, C Haen, SC Haines, PM Hamilton, Q Han, X Han, TH Hancock, S Hansmann-Menzemer, N Harnew, T Harrison, C Hasse, M Hatch, J He, M Hecker, K Heijhoff, K Heinicke, A Heister, K Hennessy, L Henry, M Heß, J Heuel, A Hicheur, R Hidalgo Charman, D Hill, M Hilton, PH Hopchev, J Hu, W Hu, W Huang, ZC Huard, W Hulsbergen, T Humair, M Hushchyn, D Hutchcroft, D Hynds, P Ibis, M Idzik, P Ilten, A Inglessi, A Inyakin, K Ivshin, R Jacobsson, S Jakobsen, J Jalocha, E Jans, BK Jashal, A Jawahery, F Jiang, M John, D Johnson, CR Jones, C Joram, B Jost, N Jurik, S Kandybei, M Karacson, JM Kariuki, S Karodia, N Kazeev, M Kecke, F Keizer, M Kelsey, M Kenzie, T Ketel, B Khanji, A Kharisova, C Khurewathanakul, KE Kim, T Kirn, VS Kirsebom, S Klaver, K Klimaszewski, S Koliiev, M Kolpin, A Kondybayeva, A Konoplyannikov, P Kopciewicz, R Kopecna, P Koppenburg, I Kostiuk, O Kot, S Kotriakhova, M Kozeiha, L Kravchuk, M Kreps, F Kress, S Kretzschmar, P Krokovny, W Krupa, W Krzemien, W Kucewicz, M Kucharczyk, V Kudryavtsev, GJ Kunde, AK Kuonen, T Kvaratskheliya, D Lacarrere, G Lafferty, A Lai, D Lancierini, JJ Lane, G Lanfranchi, C Langenbruch, T Latham, C Lazzeroni, R Le Gac, R Lefèvre, A Leflat, F Lemaitre, O Leroy, T Lesiak, B Leverington, H Li, P-R Li, X Li, Y Li, Z Li, X Liang, T Likhomanenko, R Lindner, F Lionetto, V Lisovskyi, G Liu, X Liu, D Loh, A Loi, J Lomba Castro, I Longstaff, JH Lopes, G Loustau, GH Lovell, D Lucchesi, M Lucio Martinez, Y Luo, A Lupato, E Luppi, O Lupton, A Lusiani, X Lyu, F Machefert, F Maciuc, V Macko, P Mackowiak, S Maddrell-Mander, O Maev, A Maevskiy, K Maguire, D Maisuzenko, MW Majewski, S Malde, B Malecki, A Malinin, T Maltsev, H Malygina, G Manca, G Mancinelli, D Marangotto, J Maratas, JF Marchand, U Marconi, C Marin Benito, M Marinangeli, P Marino, J Marks, PJ Marshall, G Martellotti, L Martinazzoli, M Martinelli, D Martinez Santos, F Martinez Vidal, A Massafferri, M Materok, R Matev, A Mathad, Z Mathe, V Matiunin, C Matteuzzi, KR Mattioli, A Mauri, E Maurice, B Maurin, M McCann, L Mcconnell, A McNab, R McNulty, JV Mead, B Meadows, C Meaux, N Meinert, D Melnychuk, M Merk, A Merli, E Michielin, DA Milanes, E Millard, M-N Minard, O Mineev, L Minzoni, DS Mitzel, A Mödden, A Mogini, RD Moise, T Mombächer, IA Monroy, S Monteil, M Morandin, G Morello, MJ Morello, J Moron, AB Morris, R Mountain, H Mu, F Muheim, M Mukherjee, M Mulder, D Müller, J Müller, K Müller, V Müller, CH Murphy, D Murray, P Naik, T Nakada, R Nandakumar, A Nandi, T Nanut, I Nasteva, M Needham, N Neri, S Neubert, N Neufeld, R Newcombe, TD Nguyen, C Nguyen-Mau, S Nieswand, R Niet, N Nikitin, NS Nolte, A Oblakowska-Mucha, V Obraztsov, S Ogilvy, DP O'Hanlon, R Oldeman, CJG Onderwater, JD Osborn, A Ossowska, JM Otalora Goicochea, T Ovsiannikova, P Owen, A Oyanguren, PR Pais, T Pajero, A Palano, M Palutan, G Panshin, A Papanestis, M Pappagallo, LL Pappalardo, W Parker, C Parkes, G Passaleva, A Pastore, M Patel, C Patrignani, A Pearce, A Pellegrino, G Penso, M Pepe Altarelli, S Perazzini, D Pereima, P Perret, L Pescatore, K Petridis, A Petrolini, A Petrov, S Petrucci, M Petruzzo, B Pietrzyk, G Pietrzyk, M Pikies, M Pili, D Pinci, J Pinzino, F Pisani, A Piucci, V Placinta, S Playfer, J Plews, M Plo Casasus, F Polci, M Poli Lener, M Poliakova, A Poluektov, N Polukhina, I Polyakov, E Polycarpo, GJ Pomery, S Ponce, A Popov, D Popov, S Poslavskii, K Prasanth, E Price, C Prouve, V Pugatch, A Puig Navarro, H Pullen, G Punzi, W Qian, J Qin, R Quagliani, B Quintana, NV Raab, B Rachwal, JH Rademacker, M Rama, M Ramos Pernas, MS Rangel, F Ratnikov, G Raven, M Ravonel Salzgeber, M Reboud, F Redi, S Reichert, F Reiss, C Remon Alepuz, Z Ren, V Renaudin, S Ricciardi, S Richards, K Rinnert, P Robbe, A Robert, AB Rodrigues, E Rodrigues, JA Rodriguez Lopez, M Roehrken, S Roiser, A Rollings, V Romanovskiy, A Romero Vidal, JD Roth, M Rotondo, MS Rudolph, T Ruf, J Ruiz Vidal, JJ Saborido Silva, N Sagidova, B Saitta, V Salustino Guimaraes, C Sanchez Gras, C Sanchez Mayordomo, B Sanmartin Sedes, R Santacesaria, C Santamarina Rios, M Santimaria, E Santovetti, G Sarpis, A Sarti, C Satriano, A Satta, M Saur, D Savrina, S Schael, M Schellenberg, M Schiller, H Schindler, M Schmelling, T Schmelzer, B Schmidt, O Schneider, A Schopper, HF Schreiner, M Schubiger, S Schulte, MH Schune, R Schwemmer, B Sciascia, A Sciubba, A Semennikov, ES Sepulveda, A Sergi, N Serra, J Serrano, L Sestini, A Seuthe, P Seyfert, M Shapkin, T Shears, L Shekhtman, V Shevchenko, E Shmanin, BG Siddi, R Silva Coutinho, L Silva de Oliveira, G Simi, S Simone, I Skiba, N Skidmore, T Skwarnicki, MW Slater, JG Smeaton, E Smith, IT Smith, M Smith, M Soares, L Soares Lavra, MD Sokoloff, FJP Soler, B Souza De Paula, B Spaan, E Spadaro Norella, P Spradlin, F Stagni, M Stahl, S Stahl, P Stefko, S Stefkova, O Steinkamp, S Stemmle, O Stenyakin, M Stepanova, H Stevens, S Stone, S Stracka, ME Stramaglia, M Straticiuc, U Straumann, S Strokov, J Sun, L Sun, Y Sun, K Swientek, A Szabelski, T Szumlak, M Szymanski, Z Tang, T Tekampe, G Tellarini, F Teubert, E Thomas, MJ Tilley, V Tisserand, S T'Jampens, M Tobin, S Tolk, L Tomassetti, D Tonelli, DY Tou, E Tournefier, M Traill, MT Tran, A Trisovic, A Tsaregorodtsev, G Tuci, A Tully, N Tuning, A Ukleja, A Usachov, A Ustyuzhanin, U Uwer, A Vagner, V Vagnoni, A Valassi, S Valat, G Valenti, M van Beuzekom, H Van Hecke, E van Herwijnen, CB Van Hulse, J van Tilburg, M van Veghel, R Vazquez Gomez, P Vazquez Regueiro, C Vázquez Sierra, S Vecchi, JJ Velthuis, M Veltri, A Venkateswaran, M Vernet, M Veronesi, M Vesterinen, JV Viana Barbosa, D Vieira, M Vieites Diaz, H Viemann, X Vilasis-Cardona, A Vitkovskiy, M Vitti, V Volkov, A Vollhardt, D Vom Bruch, B Voneki, A Vorobyev, V Vorobyev, N Voropaev, R Waldi, J Walsh, J Wang, J Wang, M Wang, Y Wang, Z Wang, DR Ward, HM Wark, NK Watson, D Websdale, A Weiden, C Weisser, DJ White, M Whitehead, G Wilkinson, M Wilkinson, I Williams, M Williams, MRJ Williams, T Williams, FF Wilson, M Winn, W Wislicki, M Witek, G Wormser, SA Wotton, K Wyllie, Z Xiang, D Xiao, Y Xie, H Xing, A Xu, L Xu, M Xu, Q Xu, Z Xu, Z Xu, Z Yang, Z Yang, Y Yao, LE Yeomans, H Yin, J Yu, X Yuan, O Yushchenko, KA Zarebski, M Zavertyaev, M Zeng, D Zhang, L Zhang, S Zhang, WC Zhang, Y Zhang, A Zhelezov, Y Zheng, X Zhou, Y Zhou, X Zhu, V Zhukov, JB Zonneveld, S Zucchelli, LHCb CollaborationAbstract:
The ratio of the B_{s}^{0} and B^{+} fragmentation fractions f_{s} and f_{u} is studied with B_{s}^{0}→J/ψϕ and B^{+}→J/ψK^{+} decays using data collected by the LHCb experiment in proton-proton collisions at 7, 8, and 13 TeV center-of-mass energies. The analysis is performed in bins of B-meson momentum, longitudinal momentum, transverse momentum, pseudorapidity, and rapidity. The fragmentation-fraction ratio f_{s}/f_{u} is observed to depend on the B-meson transverse momentum with a significance of 6.0σ. This dependency is driven by the 13 TeV sample (8.7σ), while the results for the other collision energies are not significant when considered separately. Furthermore, the results show a 4.8σ evidence for an increase of f_{s}/f_{u} as a function of collision energy.Determination of strong-phase parameters in $D\rightarrow K^0_{S,L}\pi^+\pi^-$
(2020)
Authors:
M Ablikim, MN Achasov, P Adlarson, S Ahmed, M Albrecht, M Alekseev, D Ambrose, A Amoroso, FF An, Q An, Anita, Y Bai, O Bakina, R Baldini Ferroli, I Balossino, Y Ban, K Begzsuren, JV Bennett, N Berger, M Bertani, D Bettoni, F Bianchi, J Biernat, J Bloms, I Boyko, RA Briere, H Cai, X Cai, A Calcaterra, GF Cao, N Cao, SA Cetin, J Chai, JF Chang, WL Chang, G Chelkov, DY Chen, G Chen, HS Chen, J Chen, JC Chen, ML Chen, SJ Chen, YB Chen, W Cheng, G Cibinetto, F Cossio, XF Cui, HL Dai, JP Dai, XC Dai, A Dbeyssi, D Dedovich, ZY Deng, A Denig, I Denysenko, M Destefanis, F De Mori, Y Ding, C Dong, J Dong, LY Dong, MY Dong, ZL Dou, SX Du, JZ Fan, J Fang, SS Fang, Y Fang, R Farinelli, L Fava, F Feldbauer, G Felici, CQ Feng, M Fritsch, CD Fu, Y Fu, Q Gao, XL Gao, Y Gao, Y Gao, YG Gao, Z Gao, B Garillon, I Garzia, EM Gersabeck, A Gilman, K Goetzen, L Gong, WX Gong, W Gradl, M Greco, LM Gu, MH Gu, S Gu, YT Gu, AQ Guo, LB Guo, RP Guo, YP Guo, A Guskov, S Han, XQ Hao, FA Harris, KL He, FH Heinsius, T Held, YK Heng, M Himmelreich, YR Hou, ZL Hou, HM Hu, JF Hu, T Hu, Y Hu, GS Huang, JS Huang, XT Huang, XZ Huang, N Huesken, T Hussain, W Ikegami Andersson, W Imoehl, M Irshad, Q Ji, QP Ji, XB Ji, XL Ji, HL Jiang, XS Jiang, XY Jiang, JB Jiao, Z Jiao, DP Jin, S Jin, Y Jin, T Johansson, N Kalantar-Nayestanaki, XS Kang, R Kappert, M Kavatsyuk, BC Ke, IK Keshk, A Khoukaz, P Kiese, R Kiuchi, R Kliemt, L Koch, OB Kolcu, B Kopf, M Kuemmel, M Kuessner, A Kupsc, M Kurth, MG Kurth, W Kühn, JS Lange, P Larin, L Lavezzi, H Leithoff, T Lenz, C Li, Cheng Li, DM Li, F Li, FY Li, G Li, HB Li, HJ Li, JC Li, JW Li, Ke Li, LK Li, Lei Li, PL Li, PR Li, QY Li, WD Li, WG Li, XH Li, XL Li, XN Li, ZB Li, ZY Li, H Liang, H Liang, YF Liang, YT Liang, GR Liao, LZ Liao, J Libby, CX Lin, DX Lin, YJ Lin, B Liu, BJ Liu, CX Liu, D Liu, DY Liu, FH Liu, Fang Liu, Feng Liu, HB Liu, HM Liu, Huanhuan Liu, Huihui Liu, JB Liu, JY Liu, K Liu, KY Liu, Ke Liu, LY Liu, Q Liu, SB Liu, T Liu, X Liu, XY Liu, YB Liu, ZA Liu, Zhiqing Liu, YF Long, XC Lou, HJ Lu, JD Lu, JG Lu, Y Lu, YP Lu, CL Luo, MX Luo, PW Luo, T Luo, XL Luo, S Lusso, XR Lyu, FC Ma, HL Ma, LL Ma, MM Ma, QM Ma, XN Ma, XX Ma, XY Ma, YM Ma, FE Maas, M Maggiora, S Maldaner, S Malde, QA Malik, A Mangoni, YJ Mao, ZP Mao, S Marcello, ZX Meng, JG Messchendorp, G Mezzadri, J Min, TJ Min, RE Mitchell, XH Mo, YJ Mo, C Morales Morales, N Yu Muchnoi, H Muramatsu, A Mustafa, S Nakhoul, Y Nefedov, F Nerling, IB Nikolaev, Z Ning, S Nisar, SL Niu, SL Olsen, Q Ouyang, S Pacetti, Y Pan, M Papenbrock, P Patteri, M Pelizaeus, HP Peng, K Peters, J Pettersson, JL Ping, RG Ping, A Pitka, R Poling, V Prasad, HR Qi, M Qi, TY Qi, S Qian, CF Qiao, N Qin, XP Qin, XS Qin, ZH Qin, JF Qiu, SQ Qu, KH Rashid, K Ravindran, CF Redmer, M Richter, A Rivetti, V Rodin, M Rolo, G Rong, Ch Rosner, M Rump, A Sarantsev, M Savrié, Y Schelhaas, K Schoenning, W Shan, XY Shan, M Shao, CP Shen, PX Shen, XY Shen, HY Sheng, X Shi, XD Shi, JJ Song, QQ Song, XY Song, S Sosio, C Sowa, S Spataro, FF Sui, GX Sun, JF Sun, L Sun, SS Sun, XH Sun, YJ Sun, YK Sun, YZ Sun, ZJ Sun, ZT Sun, YT Tan, CJ Tang, GY Tang, X Tang, V Thoren, B Tsednee, I Uman, B Wang, BL Wang, CW Wang, DY Wang, K Wang, LL Wang, LS Wang, M Wang, MZ Wang, Meng Wang, PL Wang, RM Wang, WP Wang, X Wang, XF Wang, XL Wang, Y Wang, Y Wang, YF Wang, YQ Wang, Z Wang, ZG Wang, ZY Wang, Zongyuan Wang, T Weber, DH Wei, P Weidenkaff, HW Wen, SP Wen, U Wiedner, G Wilkinson, M Wolke, LH Wu, LJ Wu, Z Wu, L Xia, Y Xia, SY Xiao, YJ Xiao, ZJ Xiao, YG Xie, YH Xie, TY Xing, XA Xiong, QL Xiu, GF Xu, JJ Xu, L Xu, QJ Xu, W Xu, XP Xu, F Yan, L Yan, WB Yan, WC Yan, YH Yan, HJ Yang, HX Yang, L Yang, RX Yang, SL Yang, YH Yang, YX Yang, Yifan Yang, ZQ Yang, M Ye, MH Ye, JH Yin, ZY You, BX Yu, CX Yu, JS Yu, T Yu, CZ Yuan, XQ Yuan, Y Yuan, A Yuncu, AA Zafar, Y Zeng, BX Zhang, BY Zhang, CC Zhang, DH Zhang, HH Zhang, HY Zhang, J Zhang, JL Zhang, JQ Zhang, JW Zhang, JY Zhang, JZ Zhang, K Zhang, L Zhang, L Zhang, SF Zhang, TJ Zhang, XY Zhang, Y Zhang, YH Zhang, YT Zhang, Yang Zhang, Yao Zhang, Yi Zhang, Yu Zhang, ZH Zhang, ZP Zhang, ZY Zhang, G Zhao, JW Zhao, JY Zhao, JZ Zhao, Lei Zhao, Ling Zhao, MG Zhao, Q Zhao, SJ Zhao, TC Zhao, YB Zhao, ZG Zhao, A Zhemchugov, B Zheng, JP Zheng, Y Zheng, YH Zheng, B Zhong, L Zhou, LP Zhou, Q Zhou, X Zhou, XK Zhou, XR Zhou, Xiaoyu Zhou, Xu Zhou, AN Zhu, J Zhu, J Zhu, K Zhu, KJ Zhu, SH Zhu, WJ Zhu, XL Zhu, YC Zhu, YS Zhu, ZA Zhu, J Zhuang, BS Zou, JH ZouMeasurement of psi (2S) production cross-sections in proton-proton collisions at v s=7 and 13 TeV
EUROPEAN PHYSICAL JOURNAL C 80:3 (2020) ARTN 185
Authors:
R Aaij, C Abellan Beteta, B Adeva, M Adinolfi, Ca Aidala, Z Ajaltouni, S Akar, P Albicocco, J Albrecht, F Alessio, M Alexander, A Alfonso Albero, G Alkhazov, P Alvarez Cartelle, Alves AA Jr, S Amato, S Amerio, Y Amhis, L An, L Anderlini, G Andreassi, M Andreotti, Je Andrews, F Archilli, J Arnau Romeu, A Artamonov, M Artuso, K Arzymatov, E Aslanides, M Atzeni, B Audurier, S Bachmann, Jj Back, S Baker, V Balagura, W Baldini, A Baranov, Rj Barlow, S Barsuk, W Barter, M Bartolini, F Baryshnikov, V Batozskaya, B Batsukh, A Battig, V Battista, A Bay, J Beddow, F Bedeschi, I BediagaAbstract:
© 2020, CERN for the benefit of the LHCb Collaboration. The cross-sections of ψ(2 S) meson production in proton-proton collisions at s=13TeV are measured with a data sample collected by the LHCb detector corresponding to an integrated luminosity of 275pb-1. The production cross-sections for prompt ψ(2 S) mesons and those for ψ(2 S) mesons from b-hadron decays (ψ(2S)-from-b) are determined as functions of the transverse momentum, pT, and the rapidity, y, of the ψ(2 S) meson in the kinematic range 2<pT<20GeV/c and 2.0 < y< 4.5. The production cross-sections integrated over this kinematic region are σ(promptψ(2S),13TeV)=1.430±0.005(stat)±0.099(syst)μb,σ(ψ(2S)-from-b,13TeV)=0.426±0.002(stat)±0.030(syst)μb.A new measurement of ψ(2 S) production cross-sections in pp collisions at s=7TeV is also performed using data collected in 2011, corresponding to an integrated luminosity of 614pb-1. The integrated production cross-sections in the kinematic range 3.5<pT<14GeV/c and 2.0 < y< 4.5 are σ(promptψ(2S),7TeV)=0.471±0.001(stat)±0.025(syst)μb,σ(ψ(2S)-from-b,7TeV)=0.126±0.001(stat)±0.008(syst)μb.All results show reasonable agreement with theoretical calculations.Model-independent determination of the relative strong-phase difference between $D^0$ and $\bar{D}^0\rightarrow K^0_{S,L}\pi^+\pi^-$ and its impact on the measurement of the CKM angle $\gamma/\phi_3$
(2020)