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Observation of the bottomonium ground state in the decay Upsilon(3S)-->gammaetab.

  • Author(s): Aubert, B
  • Bona, M
  • Karyotakis, Y
  • Lees, JP
  • Poireau, V
  • Prencipe, E
  • Prudent, X
  • Tisserand, V
  • Garra Tico, J
  • Grauges, E
  • Lopez, L
  • Palano, A
  • Pappagallo, M
  • Eigen, G
  • Stugu, B
  • Sun, L
  • Abrams, GS
  • Battaglia, M
  • Brown, DN
  • Cahn, RN
  • Jacobsen, RG
  • Kerth, LT
  • Kolomensky, Yu G
  • Lynch, G
  • Osipenkov, IL
  • Ronan, MT
  • Tackmann, K
  • Tanabe, T
  • Hawkes, CM
  • Soni, N
  • Watson, AT
  • Koch, H
  • Schroeder, T
  • Walker, D
  • Asgeirsson, DJ
  • Fulsom, BG
  • Hearty, C
  • Mattison, TS
  • McKenna, JA
  • Barrett, M
  • Khan, A
  • Blinov, VE
  • Bukin, AD
  • Buzykaev, AR
  • Druzhinin, VP
  • Golubev, VB
  • Onuchin, AP
  • Serednyakov, SI
  • Skovpen, Yu I
  • Solodov, EP
  • Todyshev, K Yu
  • Bondioli, M
  • Curry, S
  • Eschrich, I
  • Kirkby, D
  • Lankford, AJ
  • Lund, P
  • Mandelkern, M
  • Martin, EC
  • Stoker, DP
  • Abachi, S
  • Buchanan, C
  • Gary, JW
  • Liu, F
  • Long, O
  • Shen, BC
  • Vitug, GM
  • Yasin, Z
  • Zhang, L
  • Sharma, V
  • Campagnari, C
  • Hong, TM
  • Kovalskyi, D
  • Mazur, MA
  • Richman, JD
  • Beck, TW
  • Eisner, AM
  • Flacco, CJ
  • Heusch, CA
  • Kroseberg, J
  • Lockman, WS
  • Martinez, AJ
  • Schalk, T
  • Schumm, BA
  • Seiden, A
  • Wilson, MG
  • Winstrom, LO
  • Cheng, CH
  • Doll, DA
  • Echenard, B
  • Fang, F
  • Hitlin, DG
  • Narsky, I
  • Piatenko, T
  • Porter, FC
  • Andreassen, R
  • Mancinelli, G
  • Meadows, BT
  • Mishra, K
  • Sokoloff, MD
  • Bloom, PC
  • Ford, WT
  • Gaz, A
  • Hirschauer, JF
  • Nagel, M
  • Nauenberg, U
  • Smith, JG
  • Ulmer, KA
  • Wagner, SR
  • Ayad, R
  • Soffer, A
  • Toki, WH
  • Wilson, RJ
  • Altenburg, DD
  • Feltresi, E
  • Hauke, A
  • Jasper, H
  • Karbach, M
  • Merkel, J
  • Petzold, A
  • Spaan, B
  • Wacker, K
  • Kobel, MJ
  • Mader, WF
  • Nogowski, R
  • Schubert, KR
  • Schwierz, R
  • Volk, A
  • Bernard, D
  • Bonneaud, GR
  • Latour, E
  • Verderi, M
  • Clark, PJ
  • Playfer, S
  • Watson, JE
  • Andreotti, M
  • Bettoni, D
  • Bozzi, C
  • Calabrese, R
  • Cecchi, A
  • Cibinetto, G
  • Franchini, P
  • Luppi, E
  • Negrini, M
  • Petrella, A
  • Piemontese, L
  • Santoro, V
  • Baldini-Ferroli, R
  • Calcaterra, A
  • de Sangro, R
  • Finocchiaro, G
  • Pacetti, S
  • Patteri, P
  • Peruzzi, IM
  • Piccolo, M
  • Rama, M
  • Zallo, A
  • Buzzo, A
  • Contri, R
  • Lo Vetere, M
  • Macri, MM
  • Monge, MR
  • Passaggio, S
  • Patrignani, C
  • Robutti, E
  • Santroni, A
  • Tosi, S
  • Chaisanguanthum, KS
  • Morii, M
  • Adametz, A
  • Marks, J
  • Schenk, S
  • Uwer, U
  • Klose, V
  • Lacker, HM
  • Bard, DJ
  • Dauncey, PD
  • Nash, JA
  • Tibbetts, M
  • Behera, PK
  • Chai, X
  • Charles, MJ
  • Mallik, U
  • Cochran, J
  • Crawley, HB
  • Dong, L
  • Meyer, WT
  • Prell, S
  • Rosenberg, EI
  • Rubin, AE
  • Gao, YY
  • Gritsan, AV
  • Guo, ZJ
  • Lae, CK
  • Arnaud, N
  • Béquilleux, J
  • D'Orazio, A
  • Davier, M
  • da Costa, J Firmino
  • Grosdidier, G
  • Höcker, A
  • Lepeltier, V
  • Le Diberder, F
  • Lutz, AM
  • Pruvot, S
  • Roudeau, P
  • Schune, MH
  • Serrano, J
  • Sordini, V
  • Stocchi, A
  • Wormser, G
  • Lange, DJ
  • Wright, DM
  • Bingham, I
  • Burke, JP
  • Chavez, CA
  • Fry, JR
  • Gabathuler, E
  • Gamet, R
  • Hutchcroft, DE
  • Payne, DJ
  • Touramanis, C
  • Bevan, AJ
  • Clarke, CK
  • George, KA
  • Di Lodovico, F
  • Sacco, R
  • Sigamani, M
  • Cowan, G
  • Flaecher, HU
  • Hopkins, DA
  • Paramesvaran, S
  • Salvatore, F
  • Wren, AC
  • Brown, DN
  • Davis, CL
  • Denig, AG
  • Fritsch, M
  • Gradl, W
  • Schott, G
  • Alwyn, KE
  • Bailey, D
  • Barlow, RJ
  • Chia, YM
  • Edgar, CL
  • Jackson, G
  • Lafferty, GD
  • West, TJ
  • Yi, JI
  • Anderson, J
  • Chen, C
  • Jawahery, A
  • Roberts, DA
  • Simi, G
  • Tuggle, JM
  • Dallapiccola, C
  • Li, X
  • Salvati, E
  • Saremi, S
  • Cowan, R
  • Dujmic, D
  • Fisher, PH
  • Sciolla, G
  • Spitznagel, M
  • Taylor, F
  • Yamamoto, RK
  • Zhao, M
  • Patel, PM
  • Robertson, SH
  • Lazzaro, A
  • Lombardo, V
  • Palombo, F
  • Bauer, JM
  • Cremaldi, L
  • Godang, R
  • Kroeger, R
  • Sanders, DA
  • Summers, DJ
  • Zhao, HW
  • Simard, M
  • Taras, P
  • Viaud, FB
  • Nicholson, H
  • De Nardo, G
  • Lista, L
  • Monorchio, D
  • Onorato, G
  • Sciacca, C
  • Raven, G
  • Snoek, HL
  • Jessop, CP
  • Knoepfel, KJ
  • LoSecco, JM
  • Wang, WF
  • Benelli, G
  • Corwin, LA
  • Honscheid, K
  • Kagan, H
  • Kass, R
  • Morris, JP
  • Rahimi, AM
  • Regensburger, JJ
  • Sekula, SJ
  • Wong, QK
  • Blount, NL
  • Brau, J
  • Frey, R
  • Igonkina, O
  • Kolb, JA
  • Lu, M
  • Rahmat, R
  • Sinev, NB
  • Strom, D
  • Strube, J
  • Torrence, E
  • Castelli, G
  • Gagliardi, N
  • Margoni, M
  • Morandin, M
  • Posocco, M
  • Rotondo, M
  • Simonetto, F
  • Stroili, R
  • Voci, C
  • del Amo Sanchez, P
  • Ben-Haim, E
  • Briand, H
  • Calderini, G
  • Chauveau, J
  • David, P
  • Del Buono, L
  • Hamon, O
  • Leruste, Ph
  • Ocariz, J
  • Perez, A
  • Prendki, J
  • Sitt, S
  • Gladney, L
  • Biasini, M
  • Covarelli, R
  • Manoni, E
  • Angelini, C
  • Batignani, G
  • Bettarini, S
  • Carpinelli, M
  • Cervelli, A
  • Forti, F
  • Giorgi, MA
  • Lusiani, A
  • Marchiori, G
  • Morganti, M
  • Neri, N
  • Paoloni, E
  • Rizzo, G
  • Walsh, JJ
  • Lopes Pegna, D
  • Lu, C
  • Olsen, J
  • Smith, AJS
  • Telnov, AV
  • Anulli, F
  • Baracchini, E
  • Cavoto, G
  • del Re, D
  • Di Marco, E
  • Faccini, R
  • Ferrarotto, F
  • Ferroni, F
  • Gaspero, M
  • Jackson, PD
  • Gioi, L Li
  • Mazzoni, MA
  • Morganti, S
  • Piredda, G
  • Polci, F
  • Renga, F
  • Voena, C
  • Ebert, M
  • Hartmann, T
  • Schröder, H
  • Waldi, R
  • Adye, T
  • Franek, B
  • Olaiya, EO
  • Wilson, FF
  • Emery, S
  • Escalier, M
  • Esteve, L
  • Ganzhur, SF
  • de Monchenault, G Hamel
  • Kozanecki, W
  • Vasseur, G
  • Yèche, Ch
  • Zito, M
  • Chen, XR
  • Liu, H
  • Park, W
  • Purohit, MV
  • White, RM
  • Wilson, JR
  • Allen, MT
  • Aston, D
  • Bartoldus, R
  • Bechtle, P
  • Benitez, JF
  • Bertsche, K
  • Cai, Y
  • Cenci, R
  • Coleman, JP
  • Convery, MR
  • Decker, FJ
  • Dingfelder, JC
  • Dorfan, J
  • Dubois-Felsmann, GP
  • Dunwoodie, W
  • Ecklund, S
  • Erickson, R
  • Field, RC
  • Fisher, A
  • Fox, J
  • Gabareen, AM
  • Gowdy, SJ
  • Graham, MT
  • Grenier, P
  • Hast, C
  • Innes, WR
  • Iverson, R
  • Kaminski, J
  • Kelsey, MH
  • Kim, H
  • Kim, P
  • Kocian, ML
  • Kulikov, A
  • Leith, DWGS
  • Li, S
  • Lindquist, B
  • Luitz, S
  • Luth, V
  • Lynch, HL
  • Macfarlane, DB
  • Marsiske, H
  • Messner, R
  • Muller, DR
  • Neal, H
  • Nelson, S
  • Novokhatski, A
  • O'Grady, CP
  • Ofte, I
  • Perazzo, A
  • Perl, M
  • Ratcliff, BN
  • Rivetta, C
  • Roodman, A
  • Salnikov, AA
  • Schindler, RH
  • Schwiening, J
  • Seeman, J
  • Snyder, A
  • Su, D
  • Sullivan, MK
  • Suzuki, K
  • Swain, SK
  • Thompson, JM
  • Va'vra, J
  • Van Winkle, D
  • Wagner, AP
  • Weaver, M
  • West, CA
  • Wienands, U
  • Wisniewski, WJ
  • Wittgen, M
  • Wittmer, W
  • Wright, DH
  • Wulsin, HW
  • Yan, Y
  • Yarritu, AK
  • Yi, K
  • Yocky, G
  • Young, CC
  • Ziegler, V
  • Burchat, PR
  • Edwards, AJ
  • Majewski, SA
  • Miyashita, TS
  • Petersen, BA
  • Wilden, L
  • Ahmed, S
  • Alam, MS
  • Ernst, JA
  • Pan, B
  • Saeed, MA
  • Zain, SB
  • Spanier, SM
  • Wogsland, BJ
  • Eckmann, R
  • Ritchie, JL
  • Ruland, AM
  • Schilling, CJ
  • Schwitters, RF
  • Drummond, BW
  • Izen, JM
  • Lou, XC
  • Bianchi, F
  • Gamba, D
  • Pelliccioni, M
  • Bomben, M
  • Bosisio, L
  • Cartaro, C
  • Della Ricca, G
  • Lanceri, L
  • Vitale, L
  • Azzolini, V
  • Lopez-March, N
  • Martinez-Vidal, F
  • Milanes, DA
  • Oyanguren, A
  • Albert, J
  • Banerjee, Sw
  • Bhuyan, B
  • Choi, HHF
  • Hamano, K
  • Kowalewski, R
  • Lewczuk, MJ
  • Nugent, IM
  • Roney, JM
  • Sobie, RJ
  • Gershon, TJ
  • Harrison, PF
  • Ilic, J
  • Latham, TE
  • Mohanty, GB
  • Band, HR
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  • Flood, KT
  • Pan, Y
  • Pierini, M
  • Prepost, R
  • Vuosalo, CO
  • Wu, SL
  • BABAR Collaboration
  • et al.
Abstract

We report the results of a search for the bottomonium ground state etab(1S) in the photon energy spectrum with a sample of (109+/-1) million of Upsilon(3S) recorded at the Upsilon(3S) energy with the BABAR detector at the PEP-II B factory at SLAC. We observe a peak in the photon energy spectrum at Egamma=921.2(-2.8)+2.1(stat)+/-2.4(syst) MeV with a significance of 10 standard deviations. We interpret the observed peak as being due to monochromatic photons from the radiative transition Upsilon(3S)-->gammaetab(1S). This photon energy corresponds to an etab(1S) mass of 9388.9(-2.3)+3.1(stat)+/-2.7(syst) MeV/c2. The hyperfine Upsilon(1S)-etab(1S) mass splitting is 71.4(-3.1)+2.3(stat)+/-2.7(syst) MeV/c2. The branching fraction for this radiative Upsilon(3S) decay is estimated to be [4.8+/-0.5(stat)+/-1.2(syst)]x10(-4).

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