Bottomonium spectroscopy and radiative transitions involving theχbJ(1P,2P)states atBaBar

Lees, J.  . P.; Poireau, V.; Tisserand, V.; Grauges, E.; Palano, A.; Eigen, G.; Stugu, B.; Brown, D.  . N.; Kerth, L.  . T.; Kolomensky, Y. U.  . G.; Lee, M.  . J.; Lynch, G.; Koch, H.; Schroeder, T.; Hearty, C.; Mattison, T.  . S.; Mckenna, J.  . A.; R.  . Y., So; Khan, A.; Blinov, V.  . E.; Buzykaev, A.  . R.; Druzhinin, V.  . P.; Golubev, V.  . B.; Kravchenko, E.  . A.; Onuchin, A.  . P.; Serednyakov, S.  . I.; Skovpen, Y. U.  . I.; Solodov, E.  . P.; Todyshev, K.  . Y. U.; Lankford, A.  . J.; Mandelkern, M.; Dey, B.; Gary, J.  . W.; Long, O.; Campagnari, C.; Franco Sevilla, M.; Hong, T.  . M.; Kovalskyi, D.; Richman, J.  . D.; West, C.  . A.; Eisner, A.  . M.; Lockman, W.  . S.; Panduro Vazquez, W.; Schumm, B.  . A.; Seiden, A.; Chao, D.  . S.; Cheng, C.  . H.; Echenard, B.; Flood, K.  . T.; Hitlin, D.  . G.; Miyashita, T.  . S.; Ongmongkolkul, P.; Porter, F.  . C.; Roehrken, M.; Andreassen, R.; Huard, Z.; Meadows, B.  . T.; Pushpawela, B.  . G.; Sokoloff, M.  . D.; Sun, L.; Bloom, P.  . C.; Ford, W.  . T.; Gaz, A.; Smith, J.  . G.; Wagner, S.  . R.; Ayad, R.; Toki, W.  . H.; Spaan, B.; Bernard, D.; Verderi, M.; Playfer, S.; Bettoni, D.; Bozzi, C.; Calabrese, R.; Cibinetto, G.; Fioravanti, E.; Garzia, I.; Luppi, E.; Piemontese, L.; Santoro, V.; Calcaterra, A.; De Sangro, R.; Finocchiaro, G.; Martellotti, S.; Patteri, P.; Peruzzi, I.  . M.; Piccolo, M.; Rama, M.; Zallo, A.; Contri, R.; Lo Vetere, M.; Monge, M.  . R.; Passaggio, S.; Patrignani, Claudia; Robutti, E.; Bhuyan, B.; Prasad, V.; Adametz, A.; Uwer, U.; Lacker, H.  . M.; Dauncey, P.  . D.; Mallik, U.; Chen, C.; Cochran, J.; Prell, S.; Ahmed, H.; Gritsan, A.  . V.; Arnaud, N.; Davier, M.; Derkach, D.; Grosdidier, G.; Le Diberder, F.; Lutz, A.  . M.; Malaescu, B.; Roudeau, P.; Stocchi, A.; Wormser, G.; Lange, D.  . J.; Wright, D.  . M.; Coleman, J.  . P.; Fry, J.  . R.; Gabathuler, E.; Hutchcroft, D.  . E.; Payne, D.  . J.; Touramanis, C.; Bevan, A.  . J.; Di Lodovico, F.; Sacco, R.; Cowan, G.; Bougher, J.; Brown, D.  . N.; Davis, C.  . L.; Denig, A.  . G.; Fritsch, M.; Gradl, W.; Griessinger, K.; Hafner, A.; Schubert, K.  . R.; Barlow, R.  . J.; Lafferty, G.  . D.; Cenci, R.; Hamilton, B.; Jawahery, A.; Roberts, D.  . A.; Cowan, R.; Sciolla, G.; Cheaib, R.; Patel, P.  . M.; Robertson, S.  . H.; Neri, N.; Palombo, F.; Cremaldi, L.; Godang, R.; Sonnek, P.; Summers, D.  . J.; Simard, M.; Taras, P.; De Nardo, G.; Onorato, G.; Sciacca, C.; Martinelli, M.; Raven, G.; Jessop, C.  . P.; Losecco, J.  . M.; Honscheid, K.; Kass, R.; Feltresi, E.; Margoni, M.; Morandin, M.; Posocco, M.; Rotondo, M.; Simi, G.; Simonetto, F.; Stroili, R.; Akar, S.; Ben Haim, E.; Bomben, M.; Bonneaud, G.  . R.; Briand, H.; Calderini, G.; Chauveau, J.; Leruste, P. H.; Marchiori, G.; Ocariz, J.; Biasini, M.; Manoni, E.; Pacetti, S.; Rossi, A.; Angelini, C.; Batignani, G.; Bettarini, S.; Carpinelli, M.; Casarosa, G.; Cervelli, A.; Chrzaszcz, M.; Forti, F.; Giorgi, M.  . A.; Lusiani, A.; Oberhof, B.; Paoloni, E.; Perez, A.; Rizzo, G.; Walsh, J.  . J.; Lopes Pegna, D.; Olsen, J.; Smith, A.  . J.  . S.; Faccini, R.; Ferrarotto, F.; Ferroni, F.; Gaspero, M.; Li Gioi, L.; Pilloni, A.; Piredda, G.; Bünger, C.; Dittrich, S.; Grünberg, O.; Hess, M.; Leddig, T.; Voß, C.; Waldi, R.; Adye, T.; Olaiya, E.  . O.; Wilson, F.  . F.; Emery, S.; Vasseur, G.; Anulli, F.; Aston, D.; Bard, D.  . J.; Cartaro, C.; Convery, M.  . R.; Dorfan, J.; Dubois Felsmann, G.  . P.; Dunwoodie, W.; Ebert, M.; Field, R.  . C.; Fulsom, B.  . G.; Graham, M.  . T.; Hast, C.; Innes, W.  . R.; Kim, P.; Leith, D.  . W.  . G.  . S.; Lewis, P.; Lindemann, D.; Luitz, S.; Luth, V.; Lynch, H.  . L.; Macfarlane, D.  . B.; Muller, D.  . R.; Neal, H.; Perl, M.; Pulliam, T.; Ratcliff, B.  . N.; Roodman, A.; Salnikov, A.  . A.; Schindler, R.  . H.; Snyder, A.; Su, D.; Sullivan, M.  . K.; Va’Vra, J.; Wisniewski, W.  . J.; Wulsin, H.  . W.; Purohit, M.  . V.; White, R.  . M.; Wilson, J.  . R.; Randle Conde, A.; Sekula, S.  . J.; Bellis, M.; Burchat, P.  . R.; Puccio, E.  . M.  . T.; Alam, M.  . S.; Ernst, J.  . A.; Gorodeisky, R.; Guttman, N.; Peimer, D.  . R.; Soffer, A.; Spanier, S.  . M.; Ritchie, J.  . L.; Ruland, A.  . M.; Schwitters, R.  . F.; Wray, B.  . C.; Izen, J.  . M.; Lou, X.  . C.; Bianchi, F.; De Mori, F.; Filippi, A.; Gamba, D.; Lanceri, L.; Vitale, L.; Martinez Vidal, F.; Oyanguren, A.; Villanueva Perez, P.; Albert, J.; Banerjee, S. W.; Beaulieu, A.; Bernlochner, F.  . U.; Choi, H.  . H.  . F.; King, G.  . J.; Kowalewski, R.; Lewczuk, M.  . J.; Lueck, T.; Nugent, I.  . M.; Roney, J.  . M.; Sobie, R.  . J.; Tasneem, N.; Gershon, T.  . J.; Harrison, P.  . F.; Latham, T.  . E.; Band, H.  . R.; Dasu, S.; Pan, Y.; Prepost, R.; S.  . L., Wu

doi:10.1103/PhysRevD.90.112010

We use (121±1) million Υ(3S) and (98±1) million Υ(2S) mesons recorded by the BABAR detector at the PEP-II e+e− collider at SLAC to perform a study of radiative transitions involving the χbJ(1P,2P) states in exclusive decays with μ+μ−γγ final states. We reconstruct twelve channels in four cascades using two complementary methods. In the first we identify both signal photon candidates in the electromagnetic calorimeter (EMC), employ a calorimeter timing-based technique to reduce backgrounds, and determine branching-ratio products and fine mass splittings. These results include the best observational significance yet for the χb0(2P)→γΥ(2S) and χb0(1P)→γΥ(1S) transitions. In the second method, we identify one photon candidate in the EMC and one which has converted into an e+e− pair due to interaction with detector material, and we measure absolute product branching fractions. This method is particularly useful for measuring Υ(3S)→γχb1,2(1P) decays. Additionally, we provide the most up-to-date derived branching fractions, matrix elements and mass splittings for χb transitions in the bottomonium system. Using a new technique, we also measure the two lowest-order spin-dependent coefficients in the nonrelativistic QCD Hamiltonian.

Lees, J. p., Poireau, V., Tisserand, V., Grauges, E., Palano, A., Eigen, G., et al. (2014). Bottomonium spectroscopy and radiative transitions involving theχbJ(1P,2P)states atBaBar. PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY, 90(11), 1-20 [10.1103/PhysRevD.90.112010].

Bottomonium spectroscopy and radiative transitions involving theχbJ(1P,2P)states atBaBar

Lees, J. .p.;Poireau, V.;Tisserand, V.;Grauges, E.;Palano, A.;Eigen, G.;Stugu, B.;Brown, D. .n.;Kerth, L. .t.;Kolomensky, Y.u. .g.;Lee, M. .j.;Lynch, G.;Koch, H.;Schroeder, T.;Hearty, C.;Mattison, T. .s.;Mckenna, J. .a.;So, R. .y.;Khan, A.;Blinov, V. .e.;Buzykaev, A. .r.;Druzhinin, V. .p.;Golubev, V. .b.;Kravchenko, E. .a.;Onuchin, A. .p.;Serednyakov, S. .i.;Skovpen, Y.u. .i.;Solodov, E. .p.;Todyshev, K. .y.u.;Lankford, A. .j.;Mandelkern, M.;Dey, B.;Gary, J. .w.;Long, O.;Campagnari, C.;Franco Sevilla, M.;Hong, T. .m.;Kovalskyi, D.;Richman, J. .d.;West, C. .a.;Eisner, A. .m.;Lockman, W. .s.;Panduro Vazquez, W.;Schumm, B. .a.;Seiden, A.;Chao, D. .s.;Cheng, C. .h.;Echenard, B.;Flood, K. .t.;Hitlin, D. .g.;Miyashita, T. .s.;Ongmongkolkul, P.;Porter, F. .c.;Roehrken, M.;Andreassen, R.;Huard, Z.;Meadows, B. .t.;Pushpawela, B. .g.;Sokoloff, M. .d.;Sun, L.;Bloom, P. .c.;Ford, W. .t.;Gaz, A.;Smith, J. .g.;Wagner, S. .r.;Ayad, R.;Toki, W. .h.;Spaan, B.;Bernard, D.;Verderi, M.;Playfer, S.;Bettoni, D.;Bozzi, C.;Calabrese, R.;Cibinetto, G.;Fioravanti, E.;Garzia, I.;Luppi, E.;Piemontese, L.;Santoro, V.;Calcaterra, A.;de Sangro, R.;Finocchiaro, G.;Martellotti, S.;Patteri, P.;Peruzzi, I. .m.;Piccolo, M.;Rama, M.;Zallo, A.;Contri, R.;Lo Vetere, M.;Monge, M. .r.;Passaggio, S.;PATRIGNANI, CLAUDIA;Robutti, E.;Bhuyan, B.;Prasad, V.;Adametz, A.;Uwer, U.;Lacker, H. .m.;Dauncey, P. .d.;Mallik, U.;Chen, C.;Cochran, J.;Prell, S.;Ahmed, H.;Gritsan, A. .v.;Arnaud, N.;Davier, M.;Derkach, D.;Grosdidier, G.;Le Diberder, F.;Lutz, A. .m.;Malaescu, B.;Roudeau, P.;Stocchi, A.;Wormser, G.;Lange, D. .j.;Wright, D. .m.;Coleman, J. .p.;Fry, J. .r.;Gabathuler, E.;Hutchcroft, D. .e.;Payne, D. .j.;Touramanis, C.;Bevan, A. .j.;Di Lodovico, F.;Sacco, R.;Cowan, G.;Bougher, J.;Brown, D. .n.;Davis, C. .l.;Denig, A. .g.;Fritsch, M.;Gradl, W.;Griessinger, K.;Hafner, A.;Schubert, K. .r.;Barlow, R. .j.;Lafferty, G. .d.;Cenci, R.;Hamilton, B.;Jawahery, A.;Roberts, D. .a.;Cowan, R.;Sciolla, G.;Cheaib, R.;Patel, P. .m.;Robertson, S. .h.;Neri, N.;Palombo, F.;Cremaldi, L.;Godang, R.;Sonnek, P.;Summers, D. .j.;Simard, M.;Taras, P.;De Nardo, G.;Onorato, G.;Sciacca, C.;Martinelli, M.;Raven, G.;Jessop, C. .p.;Losecco, J. .m.;Honscheid, K.;Kass, R.;Feltresi, E.;Margoni, M.;Morandin, M.;Posocco, M.;Rotondo, M.;Simi, G.;Simonetto, F.;Stroili, R.;Akar, S.;Ben Haim, E.;Bomben, M.;Bonneaud, G. .r.;Briand, H.;Calderini, G.;Chauveau, J.;Leruste, P.h.;Marchiori, G.;Ocariz, J.;Biasini, M.;Manoni, E.;Pacetti, S.;Rossi, A.;Angelini, C.;Batignani, G.;Bettarini, S.;Carpinelli, M.;Casarosa, G.;Cervelli, A.;Chrzaszcz, M.;Forti, F.;Giorgi, M. .a.;Lusiani, A.;Oberhof, B.;Paoloni, E.;Perez, A.;Rizzo, G.;Walsh, J. .j.;Lopes Pegna, D.;Olsen, J.;Smith, A. .j. .s.;Faccini, R.;Ferrarotto, F.;Ferroni, F.;Gaspero, M.;Li Gioi, L.;Pilloni, A.;Piredda, G.;Bünger, C.;Dittrich, S.;Grünberg, O.;Hess, M.;Leddig, T.;Voß, C.;Waldi, R.;Adye, T.;Olaiya, E. .o.;Wilson, F. .f.;Emery, S.;Vasseur, G.;Anulli, F.;Aston, D.;Bard, D. .j.;Cartaro, C.;Convery, M. .r.;Dorfan, J.;Dubois Felsmann, G. .p.;Dunwoodie, W.;Ebert, M.;Field, R. .c.;Fulsom, B. .g.;Graham, M. .t.;Hast, C.;Innes, W. .r.;Kim, P.;Leith, D. .w. .g. .s.;Lewis, P.;Lindemann, D.;Luitz, S.;Luth, V.;Lynch, H. .l.;Macfarlane, D. .b.;Muller, D. .r.;Neal, H.;Perl, M.;Pulliam, T.;Ratcliff, B. .n.;Roodman, A.;Salnikov, A. .a.;Schindler, R. .h.;Snyder, A.;Su, D.;Sullivan, M. .k.;Va’Vra, J.;Wisniewski, W. .j.;Wulsin, H. .w.;Purohit, M. .v.;White, R. .m.;Wilson, J. .r.;Randle Conde, A.;Sekula, S. .j.;Bellis, M.;Burchat, P. .r.;Puccio, E. .m. .t.;Alam, M. .s.;Ernst, J. .a.;Gorodeisky, R.;Guttman, N.;Peimer, D. .r.;Soffer, A.;Spanier, S. .m.;Ritchie, J. .l.;Ruland, A. .m.;Schwitters, R. .f.;Wray, B. .c.;Izen, J. .m.;Lou, X. .c.;Bianchi, F.;De Mori, F.;Filippi, A.;Gamba, D.;Lanceri, L.;Vitale, L.;Martinez Vidal, F.;Oyanguren, A.;Villanueva Perez, P.;Albert, J.;Banerjee, S.w.;Beaulieu, A.;Bernlochner, F. .u.;Choi, H. .h. .f.;King, G. .j.;Kowalewski, R.;Lewczuk, M. .j.;Lueck, T.;Nugent, I. .m.;Roney, J. .m.;Sobie, R. .j.;Tasneem, N.;Gershon, T. .j.;Harrison, P. .f.;Latham, T. .e.;Band, H. .r.;Dasu, S.;Pan, Y.;Prepost, R.;Wu, S. .l.

2014

Abstract

We use (121±1) million Υ(3S) and (98±1) million Υ(2S) mesons recorded by the BABAR detector at the PEP-II e+e− collider at SLAC to perform a study of radiative transitions involving the χbJ(1P,2P) states in exclusive decays with μ+μ−γγ final states. We reconstruct twelve channels in four cascades using two complementary methods. In the first we identify both signal photon candidates in the electromagnetic calorimeter (EMC), employ a calorimeter timing-based technique to reduce backgrounds, and determine branching-ratio products and fine mass splittings. These results include the best observational significance yet for the χb0(2P)→γΥ(2S) and χb0(1P)→γΥ(1S) transitions. In the second method, we identify one photon candidate in the EMC and one which has converted into an e+e− pair due to interaction with detector material, and we measure absolute product branching fractions. This method is particularly useful for measuring Υ(3S)→γχb1,2(1P) decays. Additionally, we provide the most up-to-date derived branching fractions, matrix elements and mass splittings for χb transitions in the bottomonium system. Using a new technique, we also measure the two lowest-order spin-dependent coefficients in the nonrelativistic QCD Hamiltonian.

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	Anno
	
				2014
			
	Rivista
	
				PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY
			
	Codice DOI
	
				https://dx.doi.org/10.1103/PhysRevD.90.112010
			
	Citazione
	
				Lees, J. p., Poireau, V., Tisserand, V., Grauges, E., Palano, A., Eigen, G., et al. (2014). Bottomonium spectroscopy and radiative transitions involving theχbJ(1P,2P)states atBaBar. PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY, 90(11), 1-20 [10.1103/PhysRevD.90.112010].
			
	Tutti gli autori
	
						Lees, J. p.; Poireau, V.; Tisserand, V.; Grauges, E.; Palano, A.; Eigen, G.; Stugu, B.; Brown, D. n.; Kerth, L. t.; Kolomensky, Yu. g.; Lee, M. j.; Ly...espandi
						
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/551178

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