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Observation ofJ/ψpResonances Consistent with Pentaquark States inΛb0→J/ψK−pDecays
Open accessAbstract
Observations of exotic structures in the J/ψp channel, which we refer to as charmonium-pentaquark states, in Λ_{b}^{0}→J/ψK^{-}p decays are presented. The data sample corresponds to an integrated luminosity of 3 fb^{-1} acquired with the LHCb detector from 7 and 8 TeV pp collisions. An amplitude analysis of the three-body final state reproduces the two-body mass and angular distributions. To obtain a satisfactory fit of the structures seen in the J/ψp mass spectrum, it is necessary to include two Breit-Wigner amplitudes that each describe a resonant state. The significance of each of these resonances is more than 9 standard deviations. One has a mass of 4380±8±29 MeV and a width of 205±18±86 MeV, while the second is narrower, with a mass of 4449.8±1.7±2.5 MeV and a width of 39±5±19 MeV. The preferred J^{P} assignments are of opposite parity, with one state having spin 3/2 and the other 5/2.
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Metadata
- Authors
- Aaij, R., Adeva, B., Adinolfi, M., Affolder, A., Ajaltouni, Z., Akar, S., Albrecht, J., Alessio, F., Alexander, M., Ali, S., Alkhazov, G., Alvarez Cartelle, P., Alves, A. A., Amato, S., Amerio, S., Amhis, Y., An, L., Anderlini, L., Anderson, J., Andreassi, G., Andreotti, M., Andrews, J. E., Appleby, R. B., Aquines Gutierrez, O., Archilli, F., d’Argent, P., 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., Belyaev, I., Ben-Haim, E., Bencivenni, G., Benson, S., Benton, J., Berezhnoy, A., Bernet, R., Bertolin, A., Bettler, M.-O., van Beuzekom, M., Bien, A., Bifani, S., Billoir, P., Bird, T., Birnkraut, A., Bizzeti, A., Blake, T., Blanc, F., Blouw, J., Blusk, S., Bocci, V., Bondar, A., Bondar, N., Bonivento, W., Borghi, S., Borsato, M., Bowcock, T. J. V., Bowen, E., Bozzi, C., Braun, S., Britsch, M., Britton, T., Brodzicka, J., Brook, N. H., Bursche, A., Buytaert, J., Cadeddu, S., Calabrese, R., Calvi, M., Calvo Gomez, M., Campana, P., Campora Perez, D., Capriotti, L., Carbone, A., Carboni, G., Cardinale, R., Cardini, A., Carniti, P., Carson, L., Carvalho Akiba, K., Casse, G., Cassina, L., Castillo Garcia, L., Cattaneo, M., Cauet, C., Cavallero, G., Cenci, R., Charles, M., Charpentier, P., Chefdeville, M., Chen, S., Cheung, S.-F., Chiapolini, N., Chrzaszcz, M., Cid Vidal, X., 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., Coombes, M., Coquereau, S., Corti, G., Corvo, M., Couturier, B., Cowan, G. A., Craik, D. C., Crocombe, A., Cruz Torres, M., Cunliffe, S., Currie, R., D’Ambrosio, C., Dall’Occo, E., Dalseno, J., David, P. N. Y., Davis, A., 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., Déléage, N., Demmer, M., Derkach, D., Deschamps, O., Dettori, F., Dey, B., Di Canto, A., Di Ruscio, F., Dijkstra, H., Donleavy, S., Dordei, F., Dorigo, M., Dosil Suárez, A., Dossett, D., Dovbnya, A., Dreimanis, K., Dufour, L., Dujany, G., Dupertuis, F., Durante, P., Dzhelyadin, R., Dziurda, A., Dzyuba, A., Easo, S., Egede, U., Egorychev, V., Eidelman, S., Eisenhardt, S., Eitschberger, U., Ekelhof, R., Eklund, L., El Rifai, I., Elsasser, C., Ely, S., Esen, S., Evans, H. M., Evans, T., Falabella, A., Färber, C., Farley, N., Farry, S., Fay, R., Ferguson, D., Fernandez Albor, V., Ferrari, F., Ferreira Rodrigues, F., Ferro-Luzzi, M., Filippov, S., Fiore, M., Fiorini, M., Firlej, M., Fitzpatrick, C., Fiutowski, T., Fohl, K., Fol, P., Fontana, M., Fontanelli, F., Forty, R., Francisco, O., Frank, M., Frei, C., Frosini, M., Fu, J., Furfaro, E., Gallas Torreira, A., Galli, D., Gallorini, S., Gambetta, S., Gandelman, M., Gandini, P., Gao, Y., García Pardiñas, J., Garra Tico, J., Garrido, L., Gascon, D., Gaspar, C., Gauld, R., Gavardi, L., Gazzoni, G., Geraci, A., Gerick, D., Gersabeck, E., Gersabeck, M., Gershon, T., Ghez, P., Gianelle, A., Gianì, S., Gibson, V., Girard, O. G., Giubega, L., Gligorov, V. V., Göbel, C., Golubkov, D., Golutvin, A., Gomes, A., Gotti, C., Grabalosa Gándara, M., Graciani Diaz, R., Granado Cardoso, L. A., Graugés, E., Graverini, E., Graziani, G., Grecu, A., Greening, E., Gregson, S., Griffith, P., Grillo, L., Grünberg, O., Gui, B., Gushchin, E., Guz, Y., Gys, T., 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., Heijne, V., Hennessy, K., Henrard, P., Henry, L., Hernando Morata, J. A., van Herwijnen, E., Heß, M., Hicheur, A., Hill, D., Hoballah, M., Hombach, C., Hulsbergen, W., Humair, T., Hussain, N., Hutchcroft, D., Hynds, D., Idzik, M., Ilten, P., Jacobsson, R., Jaeger, A., Jalocha, J., Jans, E., Jawahery, A., Jing, F., John, M., Johnson, D., Jones, C. R., Joram, C., Jost, B., Jurik, N., Kandybei, S., Kanso, W., Karacson, M., Karbach, T. M., Karodia, S., Kecke, M., Kelsey, M., Kenyon, I. R., Kenzie, M., Ketel, T., Khanji, B., Khurewathanakul, C., Klaver, S., Klimaszewski, K., Kochebina, O., Kolpin, M., Komarov, I., Koopman, R. F., Koppenburg, P., Kozeiha, M., Kravchuk, L., Kreplin, K., Kreps, M., Krocker, G., 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., Le Gac, R., van Leerdam, J., Lees, J.-P., Lefèvre, R., Leflat, A., Lefrançois, J., Leroy, O., Lesiak, T., Leverington, B., Li, Y., Likhomanenko, T., Liles, M., Lindner, R., Linn, C., Lionetto, F., Liu, B., Liu, X., Loh, D., Longstaff, I., Lopes, J. H., Lucchesi, D., Lucio Martinez, M., Luo, H., Lupato, A., Luppi, E., Lupton, O., Lusardi, N., Lusiani, A., Machefert, F., Maciuc, F., Maev, O., Maguire, K., Malde, S., Malinin, A., Manca, G., Mancinelli, G., Manning, P., Mapelli, A., Maratas, J., Marchand, J. F., Marconi, U., Marin Benito, C., Marino, P., Marks, J., Martellotti, G., Martin, M., Martinelli, M., Martinez Santos, D., Martinez Vidal, F., Martins Tostes, D., 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., Milanes, D. A., Minard, M.-N., Mitzel, D. S., Molina Rodriguez, J., Monroy, I. A., Monteil, S., Morandin, M., Morawski, P., Mordà, A., Morello, M. J., Moron, J., Morris, A. B., Mountain, R., Muheim, F., Müller, J., Müller, K., Müller, V., Mussini, M., Muster, B., Naik, P., Nakada, T., Nandakumar, R., Nandi, A., Nasteva, I., Needham, M., Neri, N., Neubert, S., Neufeld, N., Neuner, M., Nguyen, A. D., Nguyen, T. D., Nguyen-Mau, C., Niess, V., Niet, R., Nikitin, N., Nikodem, T., Ninci, D., Novoselov, A., O’Hanlon, D. P., Oblakowska-Mucha, A., Obraztsov, V., Ogilvy, S., Okhrimenko, O., Oldeman, R., Onderwater, C. J. G., Osorio Rodrigues, B., Otalora Goicochea, J. M., Otto, A., Owen, P., Oyanguren, A., Palano, A., Palombo, F., Palutan, M., Panman, J., Papanestis, A., Pappagallo, M., Pappalardo, L. L., Pappenheimer, C., Parkes, C., Passaleva, G., Patel, G. D., Patel, M., Patrignani, C., Pearce, A., Pellegrino, A., Penso, G., Pepe Altarelli, M., Perazzini, S., Perret, P., Pescatore, L., Petridis, K., Petrolini, A., Petruzzo, M., Picatoste Olloqui, E., Pietrzyk, B., Pilař, T., Pinci, D., Pistone, A., Piucci, A., Playfer, S., Plo Casasus, M., Poikela, T., Polci, F., Poluektov, A., Polyakov, I., Polycarpo, E., Popov, A., Popov, D., Popovici, B., Potterat, C., Price, E., Price, J. D., Prisciandaro, J., Pritchard, A., Prouve, C., Pugatch, V., Puig Navarro, A., Punzi, G., Qian, W., Quagliani, R., Rachwal, B., Rademacker, J. H., Rama, M., Rangel, M. S., Raniuk, I., Rauschmayr, N., Raven, G., Redi, F., Reichert, S., Reid, M. M., dos Reis, A. C., Ricciardi, S., Richards, S., Rihl, M., Rinnert, K., Rives Molina, V., Robbe, P., Rodrigues, A. B., Rodrigues, E., Rodriguez Lopez, J. A., Rodriguez Perez, P., Roiser, S., Romanovsky, V., Romero Vidal, A., Ronayne, J. W., Rotondo, M., Rouvinet, J., Ruf, T., Ruiz Valls, P., Saborido Silva, J. J., Sagidova, N., Sail, P., Saitta, B., Salustino Guimaraes, V., Sanchez Mayordomo, C., Sanmartin Sedes, B., Santacesaria, R., Santamarina Rios, C., Santimaria, M., Santovetti, E., Sarti, A., Satriano, C., Satta, A., Saunders, D. M., Savrina, D., 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., 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., Silva Coutinho, R., Simi, G., Sirendi, M., Skidmore, N., Skillicorn, I., Skwarnicki, T., Smith, E., Smith, E., Smith, I. T., Smith, J., Smith, M., Snoek, H., Sokoloff, M. D., Soler, F. J. P., Soomro, F., Souza, D., Souza De Paula, B., Spaan, B., Spradlin, P., Sridharan, S., Stagni, F., Stahl, M., Stahl, S., 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., Swientek, S., Syropoulos, V., Szczekowski, M., Szczypka, P., Szumlak, T., T’Jampens, S., Tayduganov, A., Tekampe, T., Teklishyn, M., Tellarini, G., Teubert, F., Thomas, C., Thomas, E., van Tilburg, J., Tisserand, V., Tobin, M., Todd, J., Tolk, S., Tomassetti, L., Tonelli, D., Topp-Joergensen, S., Torr, N., Tournefier, E., Tourneur, S., Trabelsi, K., Tran, M. T., Tresch, M., Trisovic, A., Tsaregorodtsev, A., Tsopelas, P., Tuning, N., Ukleja, A., Ustyuzhanin, A., Uwer, U., Vacca, C., Vagnoni, V., Valenti, G., Vallier, A., Vazquez Gomez, R., Vazquez Regueiro, P., Vázquez Sierra, C., Vecchi, S., Velthuis, J. J., Veltri, M., Veneziano, G., Vesterinen, M., Viaud, B., Vieira, D., Vieites Diaz, M., Vilasis-Cardona, X., Vollhardt, A., Volyanskyy, D., Voong, D., Vorobyev, A., Vorobyev, V., Voß, C., de Vries, J. A., Waldi, R., Wallace, C., Wallace, R., Walsh, J., Wandernoth, S., Wang, J., Ward, D. R., Watson, N. K., Websdale, D., Weiden, A., Whitehead, M., Wilkinson, G., Wilkinson, M., Williams, M., Williams, M. P., Williams, M., Williams, T., Wilson, F. F., Wimberley, J., Wishahi, J., Wislicki, W., Witek, M., Wormser, G., Wotton, S. A., Wright, S., Wyllie, K., Xie, Y., Xu, Z., Yang, Z., Yu, J., Yuan, X., Yushchenko, O., Zangoli, M., Zavertyaev, M., Zhang, L., Zhang, Y., Zhelezov, A., Zhokhov, A., Zhong, L., Zucchelli, S., & LHCb Collaboration
- Venue
- Physical Review Letters
- Publisher
- American Physical Society (APS)
- Published
- 2015-08-12
- Volume
- 115
- Issue
- 7
- Pages
- 072001-072001
- ISSN
- 0031-9007 (ISSN-L)
- 1079-7114
- OpenAlex
- W2019595721
- Cited by
- 1,286
- References
- 1
- FWCI
- 74.20
- Type
- journal article
- Language
- en
- Open access
- hybrid
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- Aaij, R., Adeva, B., Adinolfi, M., Affolder, A., Ajaltouni, Z., Akar, S., Albrecht, J., Alessio, F., Alexander, M., Ali, S., Alkhazov, G., Alvarez Cartelle, P., Alves, A. A., Amato, S., Amerio, S., Amhis, Y., An, L., Anderlini, L., Anderson, J., . . . LHCb Collaboration. (2015). Observation ofJ/ψpResonances Consistent with Pentaquark States inΛb0→J/ψK−pDecays. Physical Review Letters. https://doi.org/10.1103/physrevlett.115.072001
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