Search for excited $B_c^+$ states

Abstract

A search is performed in the invariant mass spectrum of the B c + π + π − system for the excited B c + states B c (2 1 S 0 ) + and B c (2 3 S 1 ) + using a data sample of pp collisions collected by the LHCb experiment at the centre-of-mass energy of s=8 TeV, corresponding to an integrated luminosity of 2 fb −1 . No evidence is seen for either state. Upper limits on the ratios of the production cross-sections of the B c (2 1 S 0 ) + and B c (2 3 S 1 ) + states times the branching fractions of B c (2 1 S 0 ) + → B c + π + π − and B c (2 3 S 1 ) + → B c * + π + π − over the production cross-section of the B c + state are given as a function of their masses. They are found to be between 0.02 and 0.14 at 95% confidence level for B c (2 1 S 0 ) + and B c (2 3 S 1 ) + in the mass ranges [6830, 6890] MeV/c 2 and [6795, 6890] MeV/c 2 , respectively.

Metadata

Authors/Creators:	collaboration, L Aaij, R Adeva, B Adinolfi, M Ajaltouni, Z Akar, S Albrecht, J Alessio, F Alexander, M Albero, AA Ali, S Alkhazov, G Cartelle, PA Jr, AAA Amato, S Amerio, S Amhis, Y An, L Anderlini, L Andreassi, G Andreotti, M Andrews, JE Appleby, RB Archilli, F d'Argent, P Romeu, JA Artamonov, A Artuso, M Aslanides, E Atzeni, M Auriemma, G Baalouch, M Babuschkin, I Bachmann, S Back, JJ Badalov, A Baesso, C Baker, S Balagura, V Baldini, W Baranov, A Barlow, RJ Barschel, C Barsuk, S Barter, W Baryshnikov, F Batozskaya, V Battista, V Bay, A Beaucourt, L Beddow, J Bedeschi, F Bediaga, I Beiter, A Bel, LJ Beliy, N Bellee, V Belloli, N Belous, K Belyaev, I Ben-Haim, E Bencivenni, G Benson, S Beranek, S Berezhnoy, A Bernet, R Berninghoff, D Bertholet, E Bertolin, A Betancourt, C Betti, F Bettler, MO Beuzekom, MV Bezshyiko, I Bifani, S Billoir, P Birnkraut, A Bizzeti, A Bjørn, M Blake, T Blanc, F Blusk, S Bocci, V Boettcher, T Bondar, A Bondar, N Bordyuzhin, I Borghi, S Borisyak, M Borsato, M Bossu, F Boubdir, M Bowcock, TJV Bowen, E Bozzi, C Braun, S Brodzicka, J Brundu, D Buchanan, E Burr, C Bursche, A Buytaert, J Byczynski, W Cadeddu, S Cai, H Calabrese, R Calladine, R Calvi, M Gomez, MC Camboni, A Campana, P Perez, DHC Capriotti, L Carbone, A Carboni, G Cardinale, R Cardini, A Carniti, P Carson, L Akiba, KC Casse, G Cassina, L Cattaneo, M Cavallero, G Cenci, R Chamont, D Chapman, MG Charles, M Charpentier, P Chatzikonstantinidis, G Chefdeville, M Chen, S Cheung, SF Chitic, S-G Chobanova, V Chrzaszcz, M Chubykin, A Ciambrone, P Vidal, XC Ciezarek, G Clarke, PEL Clemencic, M Cliff, HV Closier, J Coco, V Cogan, J Cogneras, E Cogoni, V Cojocariu, L Collins, P Colombo, T Comerma-Montells, A Contu, A Coombs, G Coquereau, S Corti, G Corvo, M Sobral, CMC Couturier, B Cowan, GA Craik, DC Crocombe, A Torres, MC Currie, R D'Ambrosio, C Marinho, FDC Silva, CLD Dall'Occo, E Dalseno, J Davis, A Francisco, ODA Bruyn, KD Capua, SD Cian, MD Miranda, JMD Paula, LD Serio, MD Simone, PD Dean, CT Decamp, D Buono, LD Dembinski, H-P Demmer, M Dendek, A Derkach, D Deschamps, O Dettori, F Dey, B Canto, AD Nezza, PD Dijkstra, H Dordei, F Dorigo, M Suárez, AD Douglas, L Dovbnya, A Dreimanis, K Dufour, L Dujany, G Durante, P Durham, JM Dutta, D Dzhelyadin, R Dziewiecki, M Dziurda, A Dzyuba, A Easo, S Ebert, M Egede, U Egorychev, V Eidelman, S Eisenhardt, S Eitschberger, U Ekelhof, R Eklund, L Ely, S Esen, S Evans, HM Evans, T Falabella, A Farley, N Farry, S Fazzini, D Federici, L Ferguson, D Fernandez, G Declara, PF Prieto, AF Ferrari, F Lopes, LF Rodrigues, FF Ferro-Luzzi, M Filippov, S Fini, RA Fiorini, M Firlej, M Fitzpatrick, C Fiutowski, T Fleuret, F Fontana, M Fontanelli, F Forty, R Lima, VF Frank, M Frei, C Fu, J Funk, W Furfaro, E Färber, C Gabriel, E Torreira, AG Galli, D Gallorini, S Gambetta, S Gandelman, M Gandini, P Gao, Y Martin, LMG Pardiñas, JG Tico, JG Garrido, L Garsed, PJ Gascon, D Gaspar, C Gavardi, L Gazzoni, G Gerick, D Gersabeck, E Gersabeck, M Gershon, T Ghez, P Gianì, S Gibson, V Girard, OG Giubega, L Gizdov, K Gligorov, VV Golubkov, D Golutvin, A Gomes, A Gorelov, IV Gotti, C Govorkova, E Grabowski, JP Diaz, RG Cardoso, LAG Graugés, E Graverini, E Graziani, G Grecu, A Greim, R Griffith, P Grillo, L Gruber, L Cazon, BRG Grünberg, O Gushchin, E Guz, Y Gys, T Göbel, C Hadavizadeh, T Hadjivasiliou, C Haefeli, G Haen, C Haines, SC Hamilton, B Han, X Hancock, TH Hansmann-Menzemer, S Harnew, N Harnew, ST Hasse, C Hatch, M He, J Hecker, M Heinicke, K Heister, A Hennessy, K Henrard, P Henry, L Herwijnen, EV Heß, M Hicheur, A Hill, D Hopchev, PH Hu, W Huang, W Huard, ZC Hulsbergen, W Humair, T Hushchyn, M Hutchcroft, D Ibis, P Idzik, M Ilten, P Jacobsson, R Jalocha, J Jans, E Jawahery, A Jiang, F John, M Johnson, D Jones, CR Joram, C Jost, B Jurik, N Kandybei, S Karacson, M Kariuki, JM Karodia, S Kazeev, N Kecke, M Keizer, F Kelsey, M Kenzie, M Ketel, T Khairullin, E Khanji, B Khurewathanakul, C Kirn, T Klaver, S Klimaszewski, K Klimkovich, T Koliiev, S Kolpin, M Kopecna, R Koppenburg, P Kosmyntseva, A Kotriakhova, S Kozeiha, M Kravchuk, L Kreps, M Kress, F Krokovny, P Krzemien, W Kucewicz, W Kucharczyk, M Kudryavtsev, V https://orcid.org/0000-0002-7018-5827 Kuonen, AK Kvaratskheliya, T Lacarrere, D Lafferty, G Lai, A Lanfranchi, G Langenbruch, C Latham, T Lazzeroni, C Gac, RL Leflat, A Lefrançois, J Lefèvre, R Lemaitre, F Cid, EL Leroy, O Lesiak, T Leverington, B Li, P-R Li, T Li, Y Li, Z Liang, X Likhomanenko, T Lindner, R Lionetto, F Lisovskyi, V Liu, X Loh, D Loi, A Longstaff, I Lopes, JH Lucchesi, D Martinez, ML Luo, H Lupato, A Luppi, E Lupton, O Lusiani, A Lyu, X Machefert, F Maciuc, F Macko, V Mackowiak, P Maddrell-Mander, S Maev, O Maguire, K Maisuzenko, D Majewski, MW Malde, S Malecki, B Malinin, A Maltsev, T Manca, G Mancinelli, G Marangotto, D Maratas, J Marchand, JF Marconi, U Benito, CM Marinangeli, M Marino, P Marks, J Martellotti, G Martin, M Martinelli, M Santos, DM Vidal, FM Massafferri, A Matev, R Mathad, A Mathe, Z Matteuzzi, C Mauri, A Maurice, E Maurin, B Mazurov, A McCann, M McNab, A McNulty, R Mead, JV Meadows, B Meaux, C Meier, F Meinert, N Melnychuk, D Merk, M Merli, A Michielin, E Milanes, DA Millard, E Minard, M-N Minzoni, L Mitzel, DS Mogini, A Rodriguez, JM Mombächer, T Monroy, IA Monteil, S Morandin, M Morello, MJ Morgunova, O Moron, J Morris, AB Mountain, R Muheim, F Mulder, 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, TD Nguyen-Mau, C Nieswand, S Niet, R Nikitin, N Nikodem, T Nogay, A O'Hanlon, DP Oblakowska-Mucha, A Obraztsov, V Ogilvy, S Oldeman, R Onderwater, CJG Ossowska, A Goicochea, JMO Owen, P Oyanguren, A Pais, PR Palano, A Palutan, M Papanestis, A Pappagallo, M Pappalardo, LL Parker, W Parkes, C Passaleva, G Pastore, A Patel, M Patrignani, C Pearce, A Pellegrino, A Penso, G Altarelli, MP Perazzini, S Pereima, D Perret, P Pescatore, L Petridis, K Petrolini, A Petrov, A Petruzzo, M Olloqui, EP Pietrzyk, B Pietrzyk, G Pikies, M Pinci, D Pisani, F Pistone, A Piucci, A Placinta, V Playfer, S Casasus, MP Polci, F Lener, MP Poluektov, A Polyakov, I Polycarpo, E Pomery, GJ Ponce, S Popov, A Popov, D Poslavskii, S Potterat, C Price, E Prisciandaro, J Prouve, C Pugatch, V Navarro, AP Pullen, H Punzi, G Qian, W Qin, J Quagliani, R Quintana, B Rachwal, B Rademacker, JH Rama, M Pernas, MR Rangel, MS Raniuk, I Ratnikov, F Raven, G Salzgeber, MR Reboud, M Redi, F Reichert, S Reis, ACD Alepuz, CR Renaudin, V Ricciardi, S Richards, S Rihl, M Rinnert, K Robbe, P Robert, A Rodrigues, AB Rodrigues, E Lopez, JAR Rogozhnikov, A Roiser, S Rollings, A Romanovskiy, V Vidal, AR Rotondo, M Rudolph, MS Ruf, T Valls, PR Vidal, JR Silva, JJS Sadykhov, E Sagidova, N Saitta, B Guimaraes, VS Mayordomo, CS Sedes, BS Santacesaria, R Rios, CS Santimaria, M Santovetti, E Sarpis, G Sarti, A Satriano, C Satta, A Saunders, DM Savrina, D Schael, S Schellenberg, M Schiller, M Schindler, H Schmelling, M Schmelzer, T Schmidt, B Schneider, O Schopper, A Schreiner, HF Schubiger, M Schune, MH Schwemmer, R Sciascia, B Sciubba, A Semennikov, A Sepulveda, ES Sergi, A Serra, N Serrano, J Sestini, L Seyfert, P Shapkin, M Shapoval, I Shcheglov, Y Shears, T Shekhtman, L Shevchenko, V Siddi, BG Coutinho, RS Oliveira, LSD Simi, G Simone, S Sirendi, M Skidmore, N Skwarnicki, T Smith, IT Smith, J Smith, M Lavra, LS Sokoloff, MD Soler, FJP Paula, BSD Spaan, B Spradlin, P Sridharan, S Stagni, F Stahl, M Stahl, S Stefko, P Stefkova, S Steinkamp, O Stemmle, S Stenyakin, O Stepanova, M Stevens, H Stone, S Storaci, B Stracka, S Stramaglia, ME Straticiuc, M Straumann, U Sun, J Sun, L Swientek, K Syropoulos, V Szumlak, T Szymanski, M T'Jampens, S Tayduganov, A Tekampe, T Tellarini, G Teubert, F Thomas, E Tilburg, JV Tilley, MJ Tisserand, V Tobin, M Tolk, S Tomassetti, L Tonelli, D Aoude, RTJ Tournefier, E Traill, M Tran, MT Tresch, M Trisovic, A Tsaregorodtsev, A Tsopelas, P Tully, A Tuning, N Ukleja, A Usachov, A Ustyuzhanin, A Uwer, U Vacca, C Vagner, A Vagnoni, V Valassi, A Valat, S Valenti, G Gomez, RV Regueiro, PV Vecchi, S Veghel, MV Velthuis, JJ Veltri, M Veneziano, G Venkateswaran, A Verlage, TA Vernet, M Vesterinen, M Barbosa, JVV Vieira, D Diaz, MV Viemann, H Vilasis-Cardona, X Vitti, M Volkov, V Vollhardt, A Voneki, B Vorobyev, A Vorobyev, V Voß, C Vries, JAD Sierra, CV Waldi, R Walsh, J Wang, J Wang, Y Ward, DR Wark, HM Watson, NK Websdale, D Weiden, A Weisser, C Whitehead, M Wicht, J Wilkinson, G Wilkinson, M Williams, M Williams, M Williams, T Wilson, FF Wimberley, J Winn, M Wishahi, J Wislicki, W Witek, M Wormser, G Wotton, SA Wyllie, K Xie, Y Xu, M Xu, Q Xu, Z Xu, Z Yang, Z Yang, Z Yao, Y Yin, H Yu, J Yuan, X Yushchenko, O Zarebski, KA Zavertyaev, M Zhang, L Zhang, Y Zhelezov, A Zheng, Y Zhu, X Zhukov, V Zonneveld, JB Zucchelli, S
Copyright, Publisher and Additional Information:	© The Author(s) 2018. This article is distributed under the terms of the Creative Commons Attribution License ( CC-BY 4.0 ) (https://creativecommons.org/licenses/by/4.0/), which permits any use, distribution and reproduction in any medium, provided the original author(s) and source are credited.
Keywords:	B physics; Hadron-Hadron scattering (experiments); Spectroscopy
Dates:	Accepted: 18 January 2018 Published (online): 29 January 2018 Published: 29 January 2018
Institution:	The University of Sheffield
Academic Units:	The University of Sheffield > Faculty of Science (Sheffield) > Department of Physics and Astronomy (Sheffield)
Depositing User:	Symplectic Sheffield
Date Deposited:	02 Mar 2018 15:36
Last Modified:	02 Mar 2018 15:36
Published Version:	http://dx.doi.org/10.1007/JHEP01(2018)138
Status:	Published
Publisher:	Springer Verlag
Refereed:	Yes
Identification Number:	https://doi.org/10.1007/JHEP01(2018)138

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Search for excited $B_c^+$ states

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