Observation of the bottomonium ground state in the decay Upsilon(3S)->gamma eta(b) RID C-5223-2009

Aubert, B; Bona, M; Karyotakis, Y; Lees, Jp; Poireau, V; Prencipe, E; Prudent, X; Tisserand, V; Tico, Jg; 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, Yg; 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, Yi; Solodov, Ep; Todyshev, Ky; 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; Quilleux, Jb; D'Orazio, A; Davier, M; Da Costa JF,; Grosdidier, G; Hocker, 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; Sanchez, Pda; Ben Haim, E; Briand, H; Calderini, G; Chauveau, J; David, P; Del Buono, L; Hamon, O; Leruste, P; 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, Alberto; Marchiori, G; Neri, Mmn; Paoloni, E; Rizzo, G; Walsh, Jj; Pegna, Dl; 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, Ll; Mazzoni, Ma; Morganti, S; Piredda, G; Polci, F; Renga, F; Voena, C; Ebert, M; Hartmann, T; Schroder, H; Waldi, R; Adye, T; Franek, B; Olaiya, Eo; Wilson, Ff; Emery, S; Escalier, M; Esteve, L; Ganzhur, Sf; De Monchenault GH,; Kozanecki, W; Vasseur, G; Yeche, C; 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; VanWinkle, 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, S; 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; Chen, X; Dasu, S; Flood, Kt; Pan, Y; Pierini, M; Prepost, R; Vuosalo, Co; Wu, Sl

doi:10.1103/PhysRevLett.101.071801

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We report the results of a search for the bottomonium ground state eta(b)(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 E(gamma)=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)->gamma eta(b)(1S). This photon energy corresponds to an eta(b)(1S) mass of 9388.9(-2.3)(+3.1)(stat)+/- 2.7(syst) MeV/c(2). The hyperfine Upsilon(1S)-eta(b)(1S) mass splitting is 71.4(-3.1)(+2.3)(stat)+/- 2.7(syst) MeV/c(2). The branching fraction for this radiative Upsilon(3S) decay is estimated to be [4.8 +/- 0.5(stat)+/- 1.2(syst)]x10(-4).

Titolo:	Observation of the bottomonium ground state in the decay Upsilon(3S)->gamma eta(b) RID C-5223-2009
Autori:	Aubert B Bona M Karyotakis Y Lees JP Poireau V Prencipe E Prudent X Tisserand V Tico JG 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 YG 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 YI Solodov EP Todyshev KY 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 Quilleux JB D'Orazio A Davier M Da Costa JF Grosdidier G Hocker 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 Sanchez PDA Ben Haim E Briand H Calderini G Chauveau J David P Del Buono L Hamon O Leruste P 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, Alberto Marchiori G Neri MMN Paoloni E Rizzo G Walsh JJ Pegna DL 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 LL Mazzoni MA Morganti S Piredda G Polci F Renga F Voena C Ebert M Hartmann T Schroder H Waldi R Adye T Franek B Olaiya EO Wilson FF Emery S Escalier M Esteve L Ganzhur SF De Monchenault GH Kozanecki W Vasseur G Yeche C 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 VanWinkle 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 S 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 Chen X Dasu S Flood KT Pan Y Pierini M Prepost R Vuosalo CO Wu SL mostra contributor esterni nascondi contributor esterni
Data di pubblicazione:	2008
Rivista:	PHYSICAL REVIEW LETTERS
Abstract:	We report the results of a search for the bottomonium ground state eta(b)(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 E(gamma)=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)->gamma eta(b)(1S). This photon energy corresponds to an eta(b)(1S) mass of 9388.9(-2.3)(+3.1)(stat)+/- 2.7(syst) MeV/c(2). The hyperfine Upsilon(1S)-eta(b)(1S) mass splitting is 71.4(-3.1)(+2.3)(stat)+/- 2.7(syst) MeV/c(2). The branching fraction for this radiative Upsilon(3S) decay is estimated to be [4.8 +/- 0.5(stat)+/- 1.2(syst)]x10(-4).
Handle:	http://hdl.handle.net/11384/4918
Appare nelle tipologie:	1.1 Articolo in rivista

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