Title: | Observation of Two Excited B-c(+) States and Measurement of the B-c(+) (2S) Mass in pp Collisions at root s=13 TeV |
Authors: | Sirunyan, AM Tumasyan, A Adam, W Ambrogi, F Bergauer, T Brandstetter, J Dragicevic, M Eroe, J Del Valle, AE Flechl, M Fruehwirth, R My, S Dominguez, A Bheesette, S Uniyal, R Buccilli, A Cooper, S Henderson, C Chen, HS Rumerio, P West, C Gandrajula, RP Nuzzo, S Iashvili, I Arcaro, D Bose, T Demiragli, Z Correia Silva, G Gastler, D Girgis, S Pinna, D Richardson, C Rohlf, J Pompili, A Chen, M Kharchilava, A Sperka, D Suarez, I Sulak, L Zou, D Butler, PH Benelli, G Burkle, B Coubez, X Pugliese, G Cutts, D Hadley, M Mclean, C Hakala, J Mikulec, I Jiang, CH Heintz, U Hogan, JM Ahmad, A Kwok, KHM Ranieri, A Laird, E Landsberg, G Lee, J Nguyen, D Mao, Z Narain, M Sagir, S Syarif, R Leggat, D Usai, E Selvaggi, G Ahmad, M Yu, D Band, R Brainerd, C Erodotou, E Breedon, R Sanchez, MCDLB Chertok, M Conway, J Conway, R Vanlaer, P Cox, PT Liao, H Hassan, Q Erbacher, R Flores, C Parker, A Funk, G Jensen, F Ko, W Kukral, O Blinov, V Lander, R Mulhearn, M Pellett, D Pilot, J Hoorani, HR Liu, Z Rappoccio, S Shi, M Stolp, D Taylor, D Silvestris, L Tos, K Tripathi, M Wang, Z Zhang, F Bachtis, M Bravo, C Khan, WA Roozbahani, B Cousins, R Shaheen, SM Venditti, R Dasgupta, A Florent, A Hauser, J Ignatenko, M Mccoll, N Regnard, S Saltzberg, D Schnaible, C Alverson, G Shah, MA Jeng, GY Skuja, A Valuev, V Burt, K Spiezia, A Clare, R Gary, JW Shirazi, SMAG Hanson, G Karapostoli, G Kennedy, E Lanev, A Verwilligen, P Long, OR Shoaib, M Negrete, MO Paneva, M Si, W Tao, J Wang, L Wei, H Wimpenny, S Yates, BR Abbiendi, G Haytmyradov, M Barberis, E Zhang, Y Branson, JG Waqas, M Chang, P Cittolin, S Derdzinski, M Gerosa, R Yazgan, E Battilana, C Gilbert, D Hashemi, B Freer, C Klein, D Krutelyov, V Letts, J Bialkowska, H Masciovecchio, M May, S Padhi, S Bonacorsi, D Pieri, M Sharma, V Zhang, H Haddad, Y Tadel, M Wurthwein, F Yagil, A Della Porta, GZ Hensel, C Amin, N Borgonovi, L Bhandari, R Campagnari, C Citron, M Dutta, V Hortiangtham, A Sevilla, MF Zhang, S Gouskos, L Incandela, J Marsh, B Braibant-Giacomelli, S Bluj, M Mei, H Ovcharova, A Qu, H Richman, J Madigan, G Sarica, U Stuart, D Wang, S Rad, N Campanini, R Zhao, J Yoo, J Boimska, B Anderson, D Bornheim, A Lawhorn, JM Morse, DM Lu, N Newman, HB Nguyen, TQ Capiluppi, P Pata, J Spiropulu, M Vlimant, JR Ban, Y Gorski, M Xie, S Zhang, Z Ioannou, A Zhu, RY Andrews, MB Dimova, T Ferguson, T Mudholkar, T Paulini, M Sun, M Vorobiev, I Weinberg, M Kazana, M Chen, G Orimoto, T Cumalat, JP Sarkar, T Vannerom, D Ford, WT Johnson, A MacDonald, E Mulholland, T Patel, R Perloff, A Stenson, K Ulmer, KA Szleper, M Skinnari, L Faccioli, P Wagner, SR Li, J Alexander, J Chaves, J Cheng, Y Chu, J Datta, A Frankenthal, A Mcdermott, K Mirman, N Afanasiev, S Tishelman-Charny, A Zalewski, P Patterson, JR Quach, D Li, L Rinkevicius, A Ryd, A Tan, SM Tao, Z Thom, J Castro, A Wittich, P Schoefbeck, R Malakhov, A Zientek, M Bunkowski, K Abdullin, S Albrow, M Alyari, M Li, Q Apollinari, G Cavallo, FR Apresyan, A Apyan, A Banerjee, S Wamorkar, T Bauerdick, LAT Beretvas, A Byszuk, A Berryhill, J Bhat, PC Burkett, K Ciocca, C Butler, JN Mao, Y Canepa, A Cerati, GB Wang, B Cheung, HWK Chlebana, F Cremonesi, M Doroba, K Duarte, J Cuffiani, M Elvira, VD Freeman, J Gecse, Z Gottschalk, E Qian, SJ Wisecarver, A Gray, L Green, D Grunendahl, S Gutsche, O Dallavalle, GM Kalinowski, A Hall, AR Hanlon, J Harris, RM Hasegawa, S Heller, R Wood, D Hirschauer, J Wang, D Hu, Z Fabbri, F Jayatilaka, B Jindariani, S Moraes, A Johnson, M Joshi, U Klima, B Kortelainen, MJ Bueghly, J Kreis, B Lammel, S Fanfani, A Lewis, J Wang, Y Lincoln, D Lipton, R Konecki, M Liu, M Liu, T Lykken, J Gunter, T Maeshima, K Kalsi, AK Fontanesi, E Marraffino, JM Mason, D McBride, P Merkel, P Schieck, J Avila, C Krolikowski, J Mrenna, S Nahn, S Hahn, KA Giacomelli, P O'Dell, V Papadimitriou, V Pedro, K Pena, C Rakness, G Ravera, F Ristori, L Schneider, B Misiura, M Cabrera, A Huertas Guativa, LM Kolosova, M Sexton-Kennedy, E Smith, N Soha, A Spalding, WJ Spiegel, L Stoynev, S Strait, J Strobbe, N Taylor, L Tonwar, SC Olszewski, M Schmitt, MH Tkaczyk, S Chaparro Sierra, LF Tran, N Uplegger, L Vaandering, EW Vernieri, C Verzocchi, M Vidal, R Grandi, C Wang, M Weber, HA Galinhas, B Sung, K Pyskir, A Acosta, D Avery, P Florez, C Bortignon, P Bourilkov, D Wang, Q Brinkerhoff, A Cadamuro, L Carnes, A Cherepanov, V Matveev, V Curry, D Walczak, M Errico, F Field, RD Gleyzer, S Guiducci, L Gonzalez-Hernandez, CF Joshi, BM Kim, M Konigsberg, J Korytov, A Trovato, M Lo, KH Ma, P Araujo, M Matchev, K Iemmi, F Menendez, N Mitselmakher, G Rosenzweig, D Segura Delgado, MA Shi, K Wang, J Velasco, M Wang, S Zuo, X Joshi, YR Lo Meo, S Bargassa, P Linn, S Adams, T Askew, A Hagopian, S Hagopian, V Mejia Guisao, J Bucci, R Johnson, KF Kolberg, T Marcellini, S Martinez, G Prosper, H Bastos, D Schiber, C Yohay, R Baarmand, MM Bhopatkar, V Hohlmann, M Dev, N Noonan, D Sharan, M Masetti, G Ruiz Alvarez, JD Rahmani, M Saunders, M Yumiceva, F Di Francesco, A Adams, MR Apanasevich, L Berry, D Betts, RR Goldouzian, R Navarria, FL Cavanaugh, R Chen, X Dittmer, S Giljanovic, D Evdokimov, O Gerber, CE Rebello Teles, P Hangal, DA Hofman, DJ Jung, K Perrotta, A Hildreth, M Mills, C Roy, T Tonjes, MB Varelas, N Wang, H Godinovic, N Wang, X Anampa, KH Jessop, C Primavera, F Lelas, D Konstantinou, S Karmgard, DJ Yoo, HD Moisenz, P Lannon, K Li, W Loukas, N Marinelli, N Mcalister, I Wong, K Meng, F Khristenko, V Mueller, C Musienko, Y Planer, M Mavromanolakis, G Jeitler, M Ruchti, R Siddireddy, P Smith, G Choi, Y Taroni, S Wayne, M Koseyan, OK Wightman, A Wolf, M Woodard, A Alimena, J Bylsma, B Carvalho, W Mousa, J Kardapoltsev, L Durkin, LS Flowers, S Francis, B Merlo, J-P Hill, C Ji, W Lefeld, A Ling, TY Winer, BL Cooperstein, S Rossi, AM Palichik, V Dezoort, G Spitzbart, D Nicolaou, C Mestvirishvili, A Elmer, P Haubrich, N Higginbotham, S Kalogeropoulos, A Kwan, S Rovelli, T Lange, D Lucchini, MT Perelygin, V Luo, J Marlow, D Moeller, A Mei, K Ptochos, F Ojalvo, I Olsen, J Cornelis, T Palmer, C Piroue, P Salfeld-Nebgen, J Stickland, D Savina, M Tully, C Nachtman, J Wang, Z Malik, S Norberg, S Singh, B Siroli, GP Razis, PA Barker, A Barnes, VE Das, S Gutay, L Jones, M Shmatov, S Ogul, H Jung, AW Khatiwada, A Tosi, N Mahakud, B Miller, DH Negro, G Rykaczewski, H Neumeister, N Peng, CC Piperov, S Qiu, H Onel, Y Shulha, S Albergo, S Schulte, JF Sun, J Wang, F Xiao, R Xie, W Cheng, T Tsiakkouri, D Dolen, J Parashar, N Ozok, F Costa, S Ecklund, KM Skatchkov, N Freed, S Geurts, FJM Kilpatrick, M Kumar, A Li, W Padley, BP Redjimi, R Finger, M Di Mattia, A Gallinaro, M Roberts, J Rorie, J Smirnov, V Shi, W Leiton, AGS Tu, Z Zhang, A Bodek, A De Barbaro, P Abercrombie, D Demina, R Penzo, A Duh, YT Finger, M Dulemba, JL Yoon, I Voytishin, N Fallon, C Ferbel, T Galanti, M Potenza, R Garcia-Bellido, A Han, J Puljak, I Hindrichs, O Khukhunaishvili, A Ranken, E Tan, P Ayala, E Zarubin, A Taus, R Tricomi, A Chiarito, B Chou, JP Gershtein, Y Snyder, C Halkiadakis, E Hart, A Heindl, M Hughes, E Kaplan, S Kyriacou, S Skovpen, Y Chtchipounov, L Carrera Jarrin, E Laflotte, I Lath, A Tiras, E Montalvo, R Nash, K Osherson, M Saka, H Salur, S Tuve, C Schnetzer, S Sheffield, D Chinellato, J Somalwar, S Assran, Y Wetzel, J Stone, R Thomas, S Thomassen, P Acharya, H Thakur, S Barbagli, G Delannoy, AG Heideman, J Riley, G Spanier, S Golovtsov, V Bouhali, O Blumenfeld, B Celik, A Waltenberger, W Elgammal, S Ceccarelli, R Dalchenko, M De Mattia, M Delgado, A Dildick, S Eusebi, R Gilmore, J Ivanov, Y Cocoros, A Huang, T Kamon, T Dobur, D Luo, S Marley, D Bhowmik, S Mueller, R Overton, D Pernie, L Rathjens, D Safonov, A Eminizer, N Kim, V Chatterjee, K Akchurin, N Damgov, J De Guio, F Kunori, S Lamichhane, K Carvalho Antunes De Oliveira, A Lee, SW Mengke, T Muthumuni, S Fehling, D Ciulli, V Peltola, T Kuznetsova, E Undleeb, S Volobouev, I Wang, Z Whitbeck, A Greene, S Gurrola, A Dewanjee, RK Janjam, R Civinini, C Feng, L Johns, W 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Barnyakov, A Nash, J Palladino, V Uribe Estrada, C Gao, X Snow, GR Pesaresi, M Raymond, DM Richards, A Rose, A Scott, E Maggi, G Seez, C Shtipliyski, A Stoye, M Strebler, T Morelos Pineda, A Stieger, B Summers, S Yuan, L Tapper, A Uchida, K Maggi, M Virdee, T Wardle, N Winterbottom, D Wright, J Zecchinelli, AG Zenz, SC Godshalk, A Raicevic, N Cole, JE Hobson, PR Miniello, G Ahmad, M Khan, A Kyberd, P Mackay, CK Morton, A Reid, ID Teodorescu, L Karjavine, V Zahid, S Krofcheck, D Shin, YH Call, K Dittmann, J Hatakeyama, K Chen, GM Madrid, C McMaster, B Pastika, N Smith, C Harrington, C Bartek, R |
Keywords: | particle production;bottom quark;mesons;hadron colliders |
Issue Date: | 2019 |
Publisher: | American Physical Society |
Citation: | Physical Review Letters, 2019, 122 (13), pp. 132001-1 - 132001-17 (17) |
Abstract: | Signals consistent with the B+c (2S) and B*+c (2S) states are observed in proton-proton collisions at √s =
13 TeV, in an event sample corresponding to an integrated luminosity of 143 fb−1, collected by the CMS experiment during the 2015–2018 LHC running periods. These excited ¯bc states are observed in the B+cπ+π− invariant mass spectrum, with the ground state B+c reconstructed through its decay to J/ψπ+. The two states are reconstructed as two well-resolved peaks, separated in mass by 29.1 ± 1.5(stat) ± 0.7(
syst) MeV. The observation of two peaks, rather than one, is established with a significance exceeding five standard deviations. The mass of the B+c (2S) meson is measured to be 6871.0 ± 1.2(stat) ± 0.8(syst) ± 0.8(B+c) MeV, where the last term corresponds to the uncertainty in the world-average B+c mass. |
URI: | https://bura.brunel.ac.uk/handle/2438/18006 |
DOI: | https://doi.org/10.1103/PhysRevLett.122.132001 |
ISSN: | 0031-9007 |
Appears in Collections: | Dept of Electronic and Electrical Engineering Research Papers
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