Observation of a Narrow Pentaquark State, P_{c}(4312)^{+}, and of the Two-Peak Structure of the P_{c}(4450)^{+}.
Physical review letters 122:22 (2019) 222001
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, P d'Argent, 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, N Belloli, K Belous, I Belyaev, E Ben-Haim, G Bencivenni, S Benson, S Beranek, A Berezhnoy, R Bernet, D Berninghoff, E Bertholet, A Bertolin, C Betancourt, F Betti, MO Bettler, M van Beuzekom, 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 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, V Coco, JAB Coelho, J Cogan, E Cogneras, L Cojocariu, P Collins, T Colombo, A Comerma-Montells, A Contu, G Coombs, S Coquereau, G Corti, CM Costa Sobral, B Couturier, GA Cowan, DC Craik, A Crocombe, M Cruz Torres, R Currie, C D'Ambrosio, CL Da Silva, E Dall'Occo, J Dalseno, A Danilina, 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, CT Dean, W Dean, D Decamp, L Del Buono, B Delaney, H-P Dembinski, M Demmer, A Dendek, D Derkach, O Deschamps, F Desse, F Dettori, B Dey, A Di Canto, P Di Nezza, S Didenko, H Dijkstra, F Dordei, M Dorigo, 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, S Ek-In, R Ekelhof, L Eklund, S Ely, A Ene, S Escher, S Esen, T Evans, A Falabella, N Farley, S Farry, D Fazzini, P Fernandez Declara, A Fernandez Prieto, C Fernández-Ramírez, 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, C Färber, M Féo, E Gabriel, A Gallas Torreira, D Galli, S Gallorini, S Gambetta, Y Gan, M Gandelman, P Gandini, Y Gao, LM Garcia Martin, B Garcia Plana, J García Pardiñas, 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, OG Girard, P Gironella Gironell, L Giubega, K Gizdov, VV Gligorov, 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, X Guo, E Gushchin, A Guth, Yu Guz, T Gys, C Göbel, T Hadavizadeh, C Hadjivasiliou, G Haefeli, C Haen, SC Haines, B Hamilton, Q Han, X Han, TH Hancock, S Hansmann-Menzemer, N Harnew, T Harrison, C Hasse, M Hatch, J He, M Hecker, K Heinicke, A Heister, K Hennessy, L Henry, E van Herwijnen, J Heuel, M Heß, 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, 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, G Lanfranchi, C Langenbruch, T Latham, C Lazzeroni, R Le Gac, A Leflat, R Lefèvre, 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, P Ling, 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, R Ma, F Machefert, F Maciuc, V Macko, P Mackowiak, S Maddrell-Mander, O Maev, 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, A McNab, R McNulty, JV Mead, B Meadows, C Meaux, N Meinert, D Melnychuk, M Merk, A Merli, E Michielin, M Mikhasenko, DA Milanes, E Millard, M-N Minard, L Minzoni, DS Mitzel, 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, CH Murphy, D Murray, A Mödden, D Müller, J Müller, K Müller, V Müller, 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, DP O'Hanlon, A Oblakowska-Mucha, V Obraztsov, S Ogilvy, 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, A Pilloni, 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, 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, AC Dos Reis, 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, A Stocchi, S Stone, S Stracka, ME Stramaglia, M Straticiuc, U Straumann, S Strokov, J Sun, L Sun, Y Sun, K Swientek, A Szabelski, A Szczepaniak, T Szumlak, M Szymanski, S T'Jampens, Z Tang, T Tekampe, G Tellarini, F Teubert, E Thomas, J van Tilburg, MJ Tilley, V Tisserand, 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, H Van Hecke, CB Van Hulse, A Vasiliev, R Vazquez Gomez, P Vazquez Regueiro, S Vecchi, M van Veghel, 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, JA de Vries, C Vázquez Sierra, 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, M Whitehead, G Wilkinson, M Wilkinson, I Williams, MRJ Williams, M Williams, T Williams, FF Wilson, M Winn, W Wislicki, M Witek, G Wormser, SA Wotton, K Wyllie, 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 Zhu, V Zhukov, JB Zonneveld, S Zucchelli, LHCb Collaboration
Abstract:
A narrow pentaquark state, P_{c}(4312)^{+}, decaying to J/ψp, is discovered with a statistical significance of 7.3σ in a data sample of Λ_{b}^{0}→J/ψpK^{-} decays, which is an order of magnitude larger than that previously analyzed by the LHCb Collaboration. The P_{c}(4450)^{+} pentaquark structure formerly reported by LHCb is confirmed and observed to consist of two narrow overlapping peaks, P_{c}(4440)^{+} and P_{c}(4457)^{+}, where the statistical significance of this two-peak interpretation is 5.4σ. The proximity of the Σ_{c}^{+}D[over ¯]^{0} and Σ_{c}^{+}D[over ¯]^{*0} thresholds to the observed narrow peaks suggests that they play an important role in the dynamics of these states.
