Measurement of the fraction of Gamma(1S) originating from chi(b)(1P) decays in pp collisions at root s=7 TeV

Aaij, R; Beteta, C; Adametz, A; Adeva, B; Adinolfi, M; Adrover, C; Affolder, A; Ajaltouni, Z; Albrecht, J; Alessio, F; Alexander, M; Ali, S; Alkhazov, G; Cartelle, P; Alves, A; Amato, S; Amhis, Y; Anderson, J; Appleby, R; Gutierrez, O; Archilli, F; Artamonov, A; Artuso, M; Aslanides, E; Auriemma, G; Bachmann, S; Back, J; Balagura, V; Baldini, W; Barlow, R; Barschel, C; Barsuk, S; Barter, W; Bates, A; Bauer, C; Bauer, T; Bay, A; Beddow, J; Bediaga, I; Belogurov, S; Belous, K; Belyaev, I; Ben Haim, E; Benayoun, M; Bencivenni, G; Benson, S; Benton, J; Bernet, R; Bettler, M; Van Beuzekom, M; Bien, A; Bifani, S; Bird, T; Bizzeti, A; Bjornstad, P; Blake, T; Blanc, F; Blanks, C; Blouw, J; Blusk, S; Bobrov, A; Bocci, V; Bondar, A; Bondar, N; Bonivento, W; Borghi, S; Borgia, A; Bowcock, T; Bozzi, C; Brambach, T; Van, B; Bressieux, J; Brett, D; Britsch, M; Britton, T; Brook, N; Brown, H; Buechler Germann, A; Burducea, I; Bursche, A; Buytaert, J; Cadeddu, S; Callot, O; Calvi, M; Gomez, M; Camboni, A; Campana, P; Carbone, A; Carboni, G; Cardinale, R; Cardini, A; Carson, L; Akiba, K; Casse, G; Cattaneo, M; Cauet, C; Charles, M; Charpentier, P; Chen, P; Chiapolini, N; Chrzaszcz, M; Ciba, K; Vidal, X; Ciezarek, G; Clarke, P; Clemencic, M; Cliff, H; Closier, J; Coca, C; Coco, V; Cogan, J; Cogneras, E; Collins, P; Comerma Montells, A; Contu, A; Cook, A; Coombes, M; Corti, G; Couturier, B; Cowan, G; Craik, D; Currie, R; D'Ambrosio, C; David, P; David, P; De Bonis, I; De Bruyn, K; De Capua, S; De Cian, M; De Miranda, J; De Paula, L; De Simone, P; Decamp, D; Deckenhoff, M; Degaudenzi, H; Del Buono, L; Deplano, C; Derkach, D; Deschamps, O; Dettori, F; Dickens, J; Dijkstra, H; Batista, P; Bonal, F; Donleavy, S; Dordei, F; Suarez, A; Dossett, D; Dovbnya, A; Dupertuis, F; Dzhelyadin, R; Dziurda, A; Dzyuba, A; Easo, S; Egede, U; Egorychev, V; Eidelman, S; Van Eijk, D; Eisele, F; Eisenhardt, S; Ekelhof, R; Eklund, L; El Rifai, I; Elsasser, C; Elsby, D; Pereira, D; Falabella, A; Faerber, C; Fardell, G; Farinelli, C; Farry, S; Fave, V; Albor, V; Rodrigues, F; Ferro Luzzi, M; Filippov, S; Fitzpatrick, C; Fontana, M; Fontanelli, F; Forty, R; Francisco, O; Frank, M; Frei, C; Frosini, M; Furcas, S; Torreira, A; Galli, D; Gandelman, M; Gandini, P; Gao, Y; Garnier, J; Garofoli, J; Tico, J; Garrido, L; Gascon, D; Gaspar, C; Gauld, R; Gauvin, N; Gersabeck, E; Gersabeck, M; Gershon, T; Ghez, P; Gibson, V; Gligorov, V; Goebel, C; Golubkov, D; Golutvin, A; Gomes, A; Gordon, H; Gandara, M; Diaz, R; Cardoso, L; Grauges, E; Graziani, G; Grecu, A; Greening, E; Gregson, S; Gruenberg, O; Gui, B; Gushchin, E; Guz, Y; Gys, T; Hadjivasiliou, C; Haefeli, G; Haen, C; Haines, S; Hampson, T; Hansmann Menzemer, S; Harnew, N; Harnew, S; Harrison, J; Harrison, P; Hartmann, T; He, J; Heijne, V; Hennessy, K; Henrard, P; Morata, J; Null, H; Hicks, E; Hoballah, M; Hopchev, P; Hulsbergen, W; Hunt, P; Huse, T; Huston, R; Hutchcroft, D; Hynds, D; Iakovenko, V; Ilten, P; Imong, J; Jacobsson, R; Jaeger, A; Hussein, M; Jans, E; Jansen, F; Jaton, P; Jean Marie, B; Jing, F; John, M; Johnson, D; Jones, C; Jost, B; Kaballo, M; Kandybei, S; Karacson, M; Karbach, T; Keaveney, J; Kenyon, I; Kerzel, U; Ketel, T; Keune, A; Khanji, B; Kim, Y; Knecht, M; Kochebina, O; Komarov, I; Koopman, R; Koppenburg, P; Korolev, M; Kozlinskiy, A; Kravchuk, L; Kreplin, K; Kreps, M; Krocker, G; Krokovny, P; Kruse, F; Kucharczyk, M; Kudryavtsev, V; Kvaratskheliya, T; La Thi, V; Lacarrere, D; Lafferty, G; Lai, A; Lambert, D; Lambert, R; Lanciotti, E; Lanfranchi, G; Langenbruch, C; Latham, T; Lazzeroni, C; Le Gac, R; Null, L; Lees, J; Lefevre, R; Leflat, A; Lefrancois, J; Leroy, O; Lesiak, T; Li, L; Li, Y; Gioi, L; Lieng, M; Liles, M; Lindner, R; Linn, C; Liu, B; Liu, G; Null, L; Lopes, J; Asamar, E; Lopez March, N; Lu, H; Luisier, J; Mac Raighne, A; Machefert, F; Machikhiliyan, I; Maciuc, F; Maev, O; Magnin, J; Malde, S; Mamunur, R; Manca, G; Mancinelli, G; Mangiafave, N; Marconi, U; Maerki, R; Marks, J; Martellotti, G; Martens, A; Martin, L; Sanchez, A; Martinelli, M; Santos, D; Massafferri, A; Mathe, Z; Matteuzzi, C; Matveev, M; Maurice, E; Mazurov, A; Mccarthy, J; Mcgregor, G; Mcnulty, R; Meissner, M; Merk, M; Merkel, J; Milanes, D; Minard, M; Rodriguez, J; Monteil, S; Moran, D; Morawski, P; Mountain, R; Mous, I; Muheim, F; Mueller, K; Muresan, R; Muryn, B; Muster, B; Mylroie Smith, J; Naik, P; Nakada, T; Nandakumar, R; Nasteva, I; Needham, M; Neufeld, N; Nguyen, A; Nguyen Mau, C; Nicol, M; Niess, V; Nikitin, N; Nikodem, T; Nomerotski, A; Novoselov, A; Oblakowska Mucha, A; Obraztsov, V; Oggero, S; Ogilvy, S; Okhrimenko, O; Oldeman, R; Orlandea, M; Goicochea, J; Owen, P; Pal, B; Palano, A; Palutan, M; Panman, J; Papanestis, A; Pappagallo, M; Parkes, C; Parkinson, C; Passaleva, G; Patel, G; Patel, M; Patrick, G; Patrignani, C; Pavel Nicorescu, C; Alvarez, A; Pellegrino, A; Penso, G; Altarelli, M; Perazzini, S; Perego, D; Trigo, E; Yzquierdo, A; Perret, P; Perrin Terrin, M; Pessina, G; Petrolini, A; Phan, A; Olloqui, E; Valls, B; Pietrzyk, B; Pilar, T; Pinci, D; Playfer, S; Casasus, M; Polci, F; Polok, G; Poluektov, A; Polycarpo, E; Popov, D; Popovici, B; Potterat, C; Powell, A; Prisciandaro, J; Pugatch, V; Navarro, A; Qian, W; Rademacker, J; Rakotomiaramanana, B; Rangel, M; Raniuk, I; Rauschmayr, N; Raven, G; Redford, S; Reid, M; Null, R; Ricciardi, S; Richards, A; Rinnert, K; Romero, D; Robbe, P; Rodrigues, E; Rodrigues, F; Perez, P; Rogers, G; Roiser, S; Romanovsky, V; Vidal, A; Rosello, M; Rouvinet, J; Ruf, T; Ruiz, H; Sabatino, G; Silva, J; Sagidova, N; Sail, P; Saitta, B; Salzmann, C; Sedes, B; Sannino, M; Santacesaria, R; Rios, C; Santinelli, R; Santovetti, E; Sapunov, M; Sarti, A; Satriano, C; Satta, A; Savrie, M; Savrina, D; Schaack, P; Schiller, M; Schindler, H; Schleich, S; Schlupp, M; Schmelling, M; Schmidt, B; Schneider, O; Schopper, A; Schune, M; Schwemmer, R; Sciascia, B; Sciubba, A; Seco, M; Semennikov, A; Senderowska, K; Sepp, I; Serra, N; Serrano, J; Seyfert, P; Shapkin, M; Shapoval, I; Shatalov, P; Shcheglov, Y; Shears, T; Shekhtman, L; Shevchenko, O; Shevchenko, V; Shires, A; Coutinho, R; Skwarnicki, T; Smith, N; Smith, E; Smith, M; Sobczak, K; Soler, F; Solomin, A; Soomro, F; Souza, D; De Paula, B; Spaan, B; Sparkes, A; Spradlin, P; Stagni, F; Stahl, S; Steinkamp, O; Stoica, S; Stone, S; Storaci, B; Straticiuc, M; Straumann, U; Subbiah, V; Swientek, S; Szczekowski, M; Szczypka, P; Szumlak, T; T'Jampens, S; Teklishyn, M; Teodorescu, E; Teubert, F; Thomas, C; Thomas, E; Van Tilburg, J; Tisserand, V; Tobin, M; Tolk, S; Topp Joergensen, S; Torr, N; Tournefier, E; Tourneur, S; Tran, M; Tsaregorodtsev, A; Tuning, N; Garcia, M; Ukleja, A; Uwer, U; Vagnoni, V; Valenti, G; Gomez, R; Regueiro, P; Vecchi, S; Velthuis, J; Veltri, M; Veneziano, G; Vesterinen, M; Viaud, B; Videau, I; Vieira, D; Vilasis Cardona, X; Visniakov, J; Vollhardt, A; Volyanskyy, D; Voong, D; Vorobyev, A; Vorobyev, V; Voss, C; Voss, H; Waldi, R; Wallace, R; Wandernoth, S; Wang, J; Ward, D; Watson, N; Webber, A; Websdale, D; Whitehead, M; Wicht, J; Wiedner, D; Wiggers, L; Wilkinson, G; Williams, M; Williams, M; Wilson, F; Wishahi, J; Witek, M; Witzeling, W; Wotton, S; Wright, S; Wu, S; Wyllie, K; Xie, Y; Xing, F; Xing, Z; Yang, Z; Young, R; Yuan, X; Yushchenko, O; Zangoli, M; Zavertyaev, M; Zhang, F; Zhang, L; Zhang, W; Zhang, Y; Zhelezov, A; Zhong, L; Zvyagin, A

doi:10.1007/JHEP11(2012)031

The production of chi(b)(1P) mesons in pp collisions at a centre-of-mass energy of 7 TeV is studied using 32 pb(-1) of data collected with the LHCb detector. The chi(b)(1P) mesons are reconstructed in the decay mode chi(b)(1P) -> Gamma(1S)gamma -> mu(+)mu(-)gamma. The fraction of Gamma(1S) originating from chi(b)(1P) decays in the Gamma(1S) transverse momentum range 6 < p(T)(Gamma(1S)) < 15GeV/c and rapidity range 2.0 < y(Gamma(1S)) < 4.5 is measured to be (20.7 +/- 5.7 +/- 2.1(-5.4)(+2.7))%, where the first uncertainty is statistical, the second is systematic and the last gives the range of the result due to the unknown Gamma(1S) and chi(b)(1P) polarizations.

Aaij, R., Beteta, C., Adametz, A., Adeva, B., Adinolfi, M., Adrover, C., et al. (2012). Measurement of the fraction of Gamma(1S) originating from chi(b)(1P) decays in pp collisions at root s=7 TeV. JOURNAL OF HIGH ENERGY PHYSICS, 11(11) [10.1007/JHEP11(2012)031].