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Test of lepton universality in Υ(1S) decays at BABAR.

  • Author(s): del Amo Sanchez, P
  • Lees, JP
  • Poireau, V
  • Prencipe, E
  • Tisserand, V
  • Garra Tico, J
  • Grauges, E
  • Martinelli, M
  • Palano, A
  • Pappagallo, M
  • Eigen, G
  • Stugu, B
  • Sun, L
  • Battaglia, M
  • Brown, DN
  • Hooberman, B
  • Kerth, LT
  • Kolomensky, Yu G
  • Lynch, G
  • Osipenkov, IL
  • Tanabe, T
  • Hawkes, CM
  • Soni, N
  • Watson, AT
  • Koch, H
  • Schroeder, T
  • Asgeirsson, DJ
  • Hearty, C
  • Mattison, TS
  • McKenna, JA
  • Khan, A
  • Randle-Conde, A
  • Blinov, VE
  • Buzykaev, AR
  • Druzhinin, VP
  • Golubev, VB
  • Onuchin, AP
  • Serednyakov, SI
  • Skovpen, Yu I
  • Solodov, EP
  • Todyshev, K Yu
  • Yushkov, AN
  • Bondioli, M
  • Curry, S
  • Kirkby, D
  • Lankford, AJ
  • Mandelkern, M
  • Martin, EC
  • Stoker, DP
  • Atmacan, H
  • Gary, JW
  • Liu, F
  • Long, O
  • Vitug, GM
  • Yasin, Z
  • Sharma, V
  • Campagnari, C
  • Hong, TM
  • Kovalskyi, D
  • Richman, JD
  • Eisner, AM
  • Heusch, CA
  • Kroseberg, J
  • Lockman, WS
  • Martinez, AJ
  • Schalk, T
  • Schumm, BA
  • Seiden, A
  • Winstrom, LO
  • Cheng, CH
  • Doll, DA
  • Echenard, B
  • Hitlin, DG
  • Ongmongkolkul, P
  • Porter, FC
  • Rakitin, AY
  • Andreassen, R
  • Dubrovin, MS
  • Mancinelli, G
  • Meadows, BT
  • Sokoloff, MD
  • Bloom, PC
  • Ford, WT
  • Gaz, A
  • Hirschauer, JF
  • Nagel, M
  • Nauenberg, U
  • Smith, JG
  • Wagner, SR
  • Ayad, R
  • Toki, WH
  • Hauke, A
  • Jasper, H
  • Karbach, TM
  • Merkel, J
  • Petzold, A
  • Spaan, B
  • Wacker, K
  • Kobel, MJ
  • Schubert, KR
  • Schwierz, R
  • Bernard, D
  • Verderi, M
  • Clark, PJ
  • Playfer, S
  • Watson, JE
  • Andreotti, M
  • Bettoni, D
  • Bozzi, C
  • Calabrese, R
  • Cecchi, A
  • Cibinetto, G
  • Fioravanti, E
  • Franchini, P
  • Luppi, E
  • Munerato, M
  • Negrini, M
  • Petrella, A
  • Piemontese, L
  • Baldini-Ferroli, R
  • Calcaterra, A
  • de Sangro, R
  • Finocchiaro, G
  • Nicolaci, M
  • Pacetti, S
  • Patteri, P
  • Peruzzi, IM
  • Piccolo, M
  • Rama, M
  • Zallo, A
  • Contri, R
  • Guido, E
  • Lo Vetere, M
  • Monge, MR
  • Passaggio, S
  • Patrignani, C
  • Robutti, E
  • Tosi, S
  • Bhuyan, B
  • Morii, M
  • Adametz, A
  • Marks, J
  • Schenk, S
  • Uwer, U
  • Bernlochner, FU
  • Lacker, HM
  • Lueck, T
  • Volk, A
  • Dauncey, PD
  • Tibbetts, M
  • Behera, PK
  • Mallik, U
  • Chen, C
  • Cochran, J
  • Crawley, HB
  • Dong, L
  • Meyer, WT
  • Prell, S
  • Rosenberg, EI
  • Rubin, AE
  • Gao, YY
  • Gritsan, AV
  • Guo, ZJ
  • Arnaud, N
  • Davier, M
  • Derkach, D
  • Firmino da Costa, J
  • Grosdidier, G
  • Le Diberder, F
  • Lutz, AM
  • Malaescu, B
  • Perez, A
  • Roudeau, P
  • Schune, MH
  • Serrano, J
  • Sordini, V
  • Stocchi, A
  • Wang, L
  • Wormser, G
  • Lange, DJ
  • Wright, DM
  • Bingham, I
  • Burke, JP
  • Chavez, CA
  • Coleman, JP
  • Fry, JR
  • Gabathuler, E
  • Gamet, R
  • Hutchcroft, DE
  • Payne, DJ
  • Touramanis, C
  • Bevan, AJ
  • Di Lodovico, F
  • Sacco, R
  • Sigamani, M
  • Cowan, G
  • Paramesvaran, S
  • Wren, AC
  • Brown, DN
  • Davis, CL
  • Denig, AG
  • Fritsch, M
  • Gradl, W
  • Hafner, A
  • Alwyn, KE
  • Bailey, D
  • Barlow, RJ
  • Jackson, G
  • Lafferty, GD
  • West, TJ
  • Anderson, J
  • Cenci, R
  • Jawahery, A
  • Roberts, DA
  • Simi, G
  • Tuggle, JM
  • Dallapiccola, C
  • Salvati, E
  • Cowan, R
  • Dujmic, D
  • Fisher, PH
  • Sciolla, G
  • Yamamoto, RK
  • Zhao, M
  • Patel, PM
  • Robertson, SH
  • Schram, M
  • Biassoni, P
  • Lazzaro, A
  • Lombardo, V
  • Palombo, F
  • Stracka, S
  • Cremaldi, L
  • Godang, R
  • Kroeger, R
  • Sonnek, P
  • Summers, DJ
  • Zhao, HW
  • Nguyen, X
  • Simard, M
  • Taras, P
  • De Nardo, G
  • Monorchio, D
  • Onorato, G
  • Sciacca, C
  • Raven, G
  • Snoek, HL
  • Jessop, CP
  • Knoepfel, KJ
  • LoSecco, JM
  • Wang, WF
  • Corwin, LA
  • Honscheid, K
  • Kass, R
  • Morris, JP
  • Rahimi, AM
  • Blount, NL
  • Brau, J
  • Frey, R
  • Igonkina, O
  • Kolb, JA
  • Rahmat, R
  • Sinev, NB
  • Strom, D
  • Strube, J
  • Torrence, E
  • Castelli, G
  • Feltresi, E
  • Gagliardi, N
  • Margoni, M
  • Morandin, M
  • Posocco, M
  • Rotondo, M
  • Simonetto, F
  • Stroili, R
  • Ben-Haim, E
  • Bonneaud, GR
  • Briand, H
  • Chauveau, J
  • Hamon, O
  • Leruste, Ph
  • Marchiori, G
  • Ocariz, J
  • Prendki, J
  • Sitt, S
  • Biasini, M
  • Manoni, E
  • Angelini, C
  • Batignani, G
  • Bettarini, S
  • Calderini, G
  • Carpinelli, M
  • Cervelli, A
  • Forti, F
  • Giorgi, MA
  • Lusiani, A
  • 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
  • Faccini, R
  • Ferrarotto, F
  • Ferroni, F
  • Gaspero, M
  • Li Gioi, L
  • Mazzoni, MA
  • Piredda, G
  • Renga, F
  • Ebert, M
  • Hartmann, T
  • Leddig, T
  • Schröder, H
  • Waldi, R
  • Adye, T
  • Franek, B
  • Olaiya, EO
  • Wilson, FF
  • Emery, S
  • Hamel de Monchenault, G
  • Vasseur, G
  • Yèche, Ch
  • Zito, M
  • Allen, MT
  • Aston, D
  • Bard, DJ
  • Bartoldus, R
  • Benitez, JF
  • Cartaro, C
  • Convery, MR
  • Dorfan, J
  • Dubois-Felsmann, GP
  • Dunwoodie, W
  • Field, RC
  • Franco Sevilla, M
  • Fulsom, BG
  • Gabareen, AM
  • Graham, MT
  • Grenier, P
  • Hast, C
  • Innes, WR
  • Kelsey, MH
  • Kim, H
  • Kim, P
  • Kocian, ML
  • Leith, DWGS
  • Li, S
  • Lindquist, B
  • Luitz, S
  • Luth, V
  • Lynch, HL
  • MacFarlane, DB
  • Marsiske, H
  • Muller, DR
  • Neal, H
  • Nelson, S
  • O'Grady, CP
  • Ofte, I
  • Perl, M
  • Ratcliff, BN
  • Roodman, A
  • Salnikov, AA
  • Santoro, V
  • Schindler, RH
  • Schwiening, J
  • Snyder, A
  • Su, D
  • Sullivan, MK
  • Suzuki, K
  • Thompson, JM
  • Va'vra, J
  • Wagner, AP
  • Weaver, M
  • West, CA
  • Wisniewski, WJ
  • Wittgen, M
  • Wright, DH
  • Wulsin, HW
  • Yarritu, AK
  • Young, CC
  • Ziegler, V
  • Chen, XR
  • Park, W
  • Purohit, MV
  • White, RM
  • Wilson, JR
  • Sekula, SJ
  • Bellis, M
  • Burchat, PR
  • Edwards, AJ
  • Miyashita, TS
  • Ahmed, S
  • Alam, MS
  • Ernst, JA
  • Pan, B
  • Saeed, MA
  • Zain, SB
  • Guttman, N
  • Soffer, A
  • Lund, P
  • Spanier, SM
  • Eckmann, R
  • Ritchie, JL
  • Ruland, AM
  • Schilling, CJ
  • Schwitters, RF
  • Wray, BC
  • Izen, JM
  • Lou, XC
  • Bianchi, F
  • Gamba, D
  • Pelliccioni, M
  • Bomben, M
  • Della Ricca, G
  • Lanceri, L
  • Vitale, L
  • Azzolini, V
  • Lopez-March, N
  • Martinez-Vidal, F
  • Milanes, DA
  • Oyanguren, A
  • Albert, J
  • Banerjee, Sw
  • Choi, HHF
  • Hamano, K
  • King, GJ
  • Kowalewski, R
  • Lewczuk, MJ
  • Nugent, IM
  • Roney, JM
  • Sobie, RJ
  • Gershon, TJ
  • Harrison, PF
  • Ilic, J
  • Latham, TE
  • Mohanty, GB
  • Puccio, EMT
  • Band, HR
  • Chen, X
  • Dasu, S
  • Flood, KT
  • Pan, Y
  • Pierini, M
  • Prepost, R
  • Vuosalo, CO
  • Wu, SL
  • BABAR Collaboration
  • et al.
Abstract

The ratio R(τμ)(Υ(1S))=Γ(Υ(1S)→τ+ τ-)/Γ(Υ(1S)→μ+ μ-) is measured using a sample of (121.8±1.2)×10(6)Υ(3S) events recorded by the BABAR detector. This measurement is intended as a test of lepton universality and as a search for a possible light pseudoscalar Higgs boson. In the standard model (SM) this ratio is expected to be close to 1. Any significant deviations would violate lepton universality and could be introduced by the coupling to a light pseudoscalar Higgs boson. The analysis studies the decays Υ(3S)→Υ(1S)π+ π-, Υ(1S)→l+ l-, where l=μ, τ. The result, R(τμ)(Υ(1S))=1.005±0.013(stat)±0.022(syst), shows no deviation from the expected SM value, while improving the precision with respect to previous measurements.

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