1. Evidence for exotic hadron contributions to $\Lambda_b^0 \to J/\psi p \pi^-$ decays
- Author
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LHCb collaboration, Aaij, R., Beteta, C. Abellán, Adeva, B., Adinolfi, M., Ajaltouni, Z., Akar, S., Albrecht, J., Alessio, F., Alexander, M., Ali, S., Alkhazov, G., Cartelle, P. Alvarez, Alves Jr, A. A., Amato, S., Amerio, S., Amhis, Y., An, L., Anderlini, L., Andreassi, G., Andreotti, M., Andrews, J. E., Appleby, R. B., Gutierrez, O. Aquines, Archilli, F., d'Argent, P., Romeu, J. Arnau, Artamonov, A., Artuso, M., Aslanides, E., Auriemma, G., Baalouch, M., Bachmann, S., Back, J. J., Badalov, A., Baesso, C., Baldini, W., Barlow, R. J., Barschel, C., Barsuk, S., Barter, W., Batozskaya, V., Battista, V., Bay, A., Beaucourt, L., Beddow, J., Bedeschi, F., Bediaga, I., Bel, L. J., Bellee, V., Belloli, N., Belous, K., Belyaev, I., Ben-Haim, E., Bencivenni, G., Benson, S., Benton, J., Berezhnoy, A., Bernet, R., Bertolin, A., Bettler, M. -O., van Beuzekom, M., Bifani, S., Billoir, P., Bird, T., Birnkraut, A., Bitadze, A., Bizzeti, A., Blake, T., Blanc, F., Blouw, J., Blusk, S., Bocci, V., Boettcher, T., Bondar, A., Bondar, N., Bonivento, W., Borghi, S., Borisyak, M., Borsato, M., Bossu, F., Boubdir, M., Bowcock, T. J. V., Bowen, E., Bozzi, C., Braun, S., Britsch, M., Britton, T., Brodzicka, J., Buchanan, E., Burr, C., Bursche, A., Buytaert, J., Cadeddu, S., Calabrese, R., Calvi, M., Gomez, M. Calvo, Campana, P., Perez, D. Campora, Capriotti, L., Carbone, A., Carboni, G., Cardinale, R., Cardini, A., Carniti, P., Carson, L., Akiba, K. Carvalho, Casse, G., Cassina, L., Garcia, L. Castillo, Cattaneo, M., Cauet, Ch., Cavallero, G., Cenci, R., Charles, M., Charpentier, Ph., Chatzikonstantinidis, G., Chefdeville, M., Chen, S., Cheung, S. -F., Chobanova, V., Chrzaszcz, M., Vidal, X. Cid, Ciezarek, G., Clarke, P. E. L., Clemencic, M., Cliff, H. V., Closier, J., Coco, V., Cogan, J., Cogneras, E., Cogoni, V., Cojocariu, L., Collazuol, G., Collins, P., Comerma-Montells, A., Contu, A., Cook, A., Coquereau, S., Corti, G., Corvo, M., Sobral, C. M. Costa, Couturier, B., Cowan, G. A., Craik, D. C., Crocombe, A., Torres, M. Cruz, Cunliffe, S., Currie, R., D'Ambrosio, C., Dall'Occo, E., Dalseno, J., David, P. N. Y., Davis, A., Francisco, O. De Aguiar, De Bruyn, K., De Capua, S., De Cian, M., De Miranda, J. M., De Paula, L., De Simone, P., Dean, C. -T., Decamp, D., Deckenhoff, M., Del Buono, L., Demmer, M., Derkach, D., Deschamps, O., Dettori, F., Dey, B., Di Canto, A., Dijkstra, H., Dordei, F., Dorigo, M., Suárez, A. Dosil, Dovbnya, A., Dreimanis, K., Dufour, L., Dujany, G., Dungs, K., Durante, P., Dzhelyadin, R., Dziurda, A., Dzyuba, A., Déléage, N., Easo, S., Egede, U., Egorychev, V., Eidelman, S., Eisenhardt, S., Eitschberger, U., Ekelhof, R., Eklund, L., Elsasser, Ch., Ely, S., Esen, S., Evans, H. M., Evans, T., Falabella, A., Farley, N., Farry, S., Fay, R., Ferguson, D., Albor, V. Fernandez, Ferrari, F., Rodrigues, F. Ferreira, Ferro-Luzzi, M., Filippov, S., Fiore, M., Fiorini, M., Firlej, M., Fitzpatrick, C., Fiutowski, T., Fleuret, F., Fohl, K., Fontana, M., Fontanelli, F., Forshaw, D. C., Forty, R., Frank, M., Frei, C., Frosini, M., Fu, J., Furfaro, E., Färber, C., Torreira, A. Gallas, Galli, D., Gallorini, S., Gambetta, S., Gandelman, M., Gandini, P., Gao, Y., Pardiñas, J. García, Tico, J. Garra, Garrido, L., Garsed, P. J., Gascon, D., Gaspar, C., Gavardi, L., Gazzoni, G., Gerick, D., Gersabeck, E., Gersabeck, M., Gershon, T., Ghez, Ph., Gianì, S., Gibson, V., Girard, O. G., Giubega, L., Gizdov, K., Gligorov, V. V., Golubkov, D., Golutvin, A., Gomes, A., Gorelov, I. V., Gotti, C., Gándara, M. Grabalosa, Diaz, R. Graciani, Cardoso, L. A. Granado, Graugés, E., Graverini, E., Graziani, G., Grecu, A., Griffith, P., Grillo, L., Cazon, B. R. Gruberg, Grünberg, O., Gushchin, E., Guz, Yu., Gys, T., Göbel, C., Hadavizadeh, T., Hadjivasiliou, C., Haefeli, G., Haen, C., Haines, S. C., Hall, S., Hamilton, B., Han, X., Hansmann-Menzemer, S., Harnew, N., Harnew, S. T., Harrison, J., He, J., Head, T., Heister, A., Hennessy, K., Henrard, P., Henry, L., Morata, J. A. Hernando, van Herwijnen, E., Heß, M., Hicheur, A., Hill, D., Hombach, C., Hulsbergen, W., Humair, T., Hushchyn, M., Hussain, N., Hutchcroft, D., Idzik, M., Ilten, P., Jacobsson, R., Jaeger, A., Jalocha, J., Jans, E., Jawahery, A., John, M., Johnson, D., Jones, C. R., Joram, C., Jost, B., Jurik, N., Kandybei, S., Kanso, W., Karacson, M., Kariuki, J. M., Karodia, S., Kecke, M., Kelsey, M., Kenyon, I. R., Kenzie, M., Ketel, T., Khairullin, E., Khanji, B., Khurewathanakul, C., Kirn, T., Klaver, S., Klimaszewski, K., Koliiev, S., Kolpin, M., Komarov, I., Koopman, R. F., Koppenburg, P., Kozachuk, A., Kozeiha, M., Kravchuk, L., Kreplin, K., Kreps, M., Krokovny, P., Kruse, F., Krzemien, W., Kucewicz, W., Kucharczyk, M., Kudryavtsev, V., Kuonen, A. K., Kurek, K., Kvaratskheliya, T., Lacarrere, D., Lafferty, G., Lai, A., Lambert, D., Lanfranchi, G., Langenbruch, C., Langhans, B., Latham, T., Lazzeroni, C., Gac, R. Le, van Leerdam, J., Lees, J. -P., Leflat, A., Lefrançois, J., Lefèvre, R., Lemaitre, F., Cid, E. Lemos, Leroy, O., Lesiak, T., Leverington, B., Li, Y., Likhomanenko, T., Lindner, R., Linn, C., Lionetto, F., Liu, B., Liu, X., Loh, D., Longstaff, I., Lopes, J. H., Lucchesi, D., Martinez, M. Lucio, Luo, H., Lupato, A., Luppi, E., Lupton, O., Lusiani, A., Lyu, X., Machefert, F., Maciuc, F., Maev, O., Maguire, K., Malde, S., Malinin, A., Maltsev, T., Manca, G., Mancinelli, G., Manning, P., Maratas, J., Marchand, J. F., Marconi, U., Benito, C. Marin, Marino, P., Marks, J., Martellotti, G., Martin, M., Martinelli, M., Santos, D. Martinez, Vidal, F. Martinez, Tostes, D. Martins, Massacrier, L. M., Massafferri, A., Matev, R., Mathad, A., Mathe, Z., Matteuzzi, C., Mauri, A., Maurin, B., Mazurov, A., McCann, M., McCarthy, J., McNab, A., McNulty, R., Meadows, B., Meier, F., Meissner, M., Melnychuk, D., Merk, M., Michielin, E, Milanes, D. A., Minard, M. -N., Mitzel, D. S., Rodriguez, J. Molina, Monroy, I. A., Monteil, S., Morandin, M., Morawski, P., Mordà, A., Morello, M. J., Moron, J., Morris, A. B., Mountain, R., Muheim, F., Mulder, M, Mussini, M., Müller, D., Müller, J., Müller, K., Müller, V., Naik, P., Nakada, T., Nandakumar, R., Nandi, A., Nasteva, I., Needham, M., Neri, N., Neubert, S., Neufeld, N., Neuner, M., Nguyen, A. D., Nguyen-Mau, C., Niess, V., Nieswand, S., Niet, R., Nikitin, N., Nikodem, T., Novoselov, A., O'Hanlon, D. P., Oblakowska-Mucha, A., Obraztsov, V., Ogilvy, S., Okhrimenko, O., Oldeman, R., Onderwater, C. J. G., Goicochea, J. M. Otalora, Otto, A., Owen, P., Oyanguren, A., Pais, P. R., Palano, A., Palombo, F., Palutan, M., Panman, J., Papanestis, A., Pappagallo, M., Pappalardo, L. L., Pappenheimer, C., Parker, W., Parkes, C., Passaleva, G., Patel, G. D., Patel, M., Patrignani, C., Pearce, A., Pellegrino, A., Penso, G., Altarelli, M. Pepe, Perazzini, S., Perret, P., Pescatore, L., Petridis, K., Petrolini, A., Petrov, A., Petruzzo, M., Olloqui, E. Picatoste, Pietrzyk, B., Pikies, M., Pinci, D., Pistone, A., Piucci, A., Playfer, S., Casasus, M. Plo, Poikela, T., Polci, F., Poluektov, A., Polyakov, I., Polycarpo, E., Pomery, G. J., Popov, A., Popov, D., Popovici, B., Potterat, C., Price, E., Price, J. D., Prisciandaro, J., Pritchard, A., Prouve, C., Pugatch, V., Navarro, A. Puig, Punzi, G., Qian, W., Quagliani, R., Rachwal, B., Rademacker, J. H., Rama, M., Pernas, M. Ramos, Rangel, M. S., Raniuk, I., Raven, G., Redi, F., Reichert, S., Reis, A. C. dos, Alepuz, C. Remon, Renaudin, V., Ricciardi, S., Richards, S., Rihl, M., Rinnert, K., Molina, V. Rives, Robbe, P., Rodrigues, A. B., Rodrigues, E., Lopez, J. A. Rodriguez, Perez, P. Rodriguez, Rogozhnikov, A., Roiser, S., Romanovskiy, V., Vidal, A. Romero, Ronayne, J. W., Rotondo, M., Ruf, T., Valls, P. Ruiz, Silva, J. J. Saborido, Sadykhov, E., Sagidova, N., Saitta, B., Guimaraes, V. Salustino, Mayordomo, C. Sanchez, Sedes, B. Sanmartin, Santacesaria, R., Rios, C. Santamarina, Santimaria, M., Santovetti, E., Sarti, A., Satriano, C., Satta, A., Saunders, D. M., Savrina, D., Schael, S., Schiller, M., Schindler, H., Schlupp, M., Schmelling, M., Schmelzer, T., Schmidt, B., Schneider, O., Schopper, A., Schubiger, M., Schune, M. -H., Schwemmer, R., Sciascia, B., Sciubba, A., Semennikov, A., Sergi, A., Serra, N., Serrano, J., Sestini, L., Seyfert, P., Shapkin, M., Shapoval, I., Shcheglov, Y., Shears, T., Shekhtman, L., Shevchenko, V., Shires, A., Siddi, B. G., Coutinho, R. Silva, de Oliveira, L. Silva, Simi, G., Sirendi, M., Skidmore, N., Skwarnicki, T., Smith, E., Smith, I. T., Smith, J., Smith, M., Snoek, H., Sokoloff, M. D., Soler, F. J. P., Souza, D., De Paula, B. Souza, Spaan, B., Spradlin, P., Sridharan, S., Stagni, F., Stahl, M., Stahl, S., Stefko, P., Stefkova, S., Steinkamp, O., Stenyakin, O., Stevenson, S., Stoica, S., Stone, S., Storaci, B., Stracka, S., Straticiuc, M., Straumann, U., Sun, L., Sutcliffe, W., Swientek, K., Syropoulos, V., Szczekowski, M., Szumlak, T., T'Jampens, S., Tayduganov, A., Tekampe, T., Tellarini, G., Teubert, F., Thomas, C., Thomas, E., van Tilburg, J., Tisserand, V., Tobin, M., Tolk, S., Tomassetti, L., Tonelli, D., Topp-Joergensen, S., Toriello, F., Tournefier, E., Tourneur, S., Trabelsi, K., Traill, M., Tran, M. T., Tresch, M., Trisovic, A., Tsaregorodtsev, A., Tsopelas, P., Tully, A., Tuning, N., Ukleja, A., Ustyuzhanin, A., Uwer, U., Vacca, C., Vagnoni, V., Valat, S., Valenti, G., Vallier, A., Gomez, R. Vazquez, Regueiro, P. Vazquez, Vecchi, S., van Veghel, M., Velthuis, J. J., Veltri, M., Veneziano, G., Venkateswaran, A., Vesterinen, M., Viaud, B., Vieira, D., Diaz, M. Vieites, Vilasis-Cardona, X., Volkov, V., Vollhardt, A., Voneki, B, Voong, D., Vorobyev, A., Vorobyev, V., Voß, C., de Vries, J. A., Sierra, C. Vázquez, Waldi, R., Wallace, C., Wallace, R., Walsh, J., Wang, J., Ward, D. R., Wark, H. M., Watson, N. K., Websdale, D., Weiden, A., Whitehead, M., Wicht, J., Wilkinson, G., Wilkinson, M., Williams, M., Williams, M. P., Williams, T., Wilson, F. F., Wimberley, J., Wishahi, J., Wislicki, W., Witek, M., Wormser, G., Wotton, S. A., Wraight, K., Wright, S., Wyllie, K., Xie, Y., Xu, Z., Yang, Z., Yin, H., Yu, J., Yuan, X., Yushchenko, O., Zangoli, M., Zarebski, K. A., Zavertyaev, M., Zhang, L., Zhang, Y., Zhelezov, A., Zheng, Y., Zhokhov, A., Zhukov, V., Zucchelli, S., Laboratoire de Physique Corpusculaire - Clermont-Ferrand (LPC), Université Blaise Pascal - Clermont-Ferrand 2 (UBP)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'Annecy de Physique des Particules (LAPP), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS), and LHCb
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[PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex] ,High Energy Physics::Experiment ,Particle Physics - Experiment ,High Energy Physics - Experiment - Abstract
A full amplitude analysis of $\Lambda_b^0 \to J/\psi p \pi^-$ decays is performed with a data sample acquired with the LHCb detector from 7 and 8 TeV $pp$ collisions, corresponding to an integrated luminosity of 3 fb$^{-1}$. A significantly better description of the data is achieved when, in addition to the previously observed nucleon excitations $N\to p\pi^-$, either the $P_c(4380)^+$ and $P_c(4450)^+\to J/\psi p$ states, previously observed in $\Lambda_b^0 \to J/\psi p K^-$ decays, or the $Z_c(4200)^-\to J/\psi \pi^-$ state, previously reported in $B^0 \to J/\psi K^+ \pi^-$ decays, or all three, are included in the amplitude models. The data support a model containing all three exotic states, with a significance of more than three standard deviations. Within uncertainties, the data are consistent with the $P_c(4380)^+$ and $P_c(4450)^+$ production rates expected from their previous observation taking account of Cabibbo suppression., Comment: Version updated to the published one. All figures and tables, along with any supplementary material and additional information, are available at https://lhcbproject.web.cern.ch/lhcbproject/Publications/LHCbProjectPublic/LHCb-PAPER-2016-015.html
- Published
- 2016