Search for a low-mass scalar Higgs boson decaying to a tau pair in single-photon decays ofΥ(1S)

J P Lees,E Fioravanti,N B Sinev,N Arnaud,F Palombo,R Sacco,M Franco Sevilla,L Lanceri,M Piccolo,E M T Puccio,A Hafner,D A Roberts,G Rizzo,R Ayad,S Emery,U Nauenberg,R De Sangro,M Bondioli,T Hartmann,M H Schune,H W Wulsin,M Posocco,F Simonetto,R Contri,D Monorchio,P R Burchat,J Ocariz,L T Kerth,M A Mazzoni,P Ongmongkolkul,M Bellis,V Poireau,A Oyanguren,C Voß,W T Meyer,A P Onuchin,V P Druzhinin,J Albert,S Bettarini,C H Cheng,R Baldini-Ferroli,E P Solodov,E Torrence,S I Serednyakov,J M Roney,D Su,G R Bonneaud,N Tasneem,O Hamon,G Wormser,G Cibinetto,V B Golubev,S Prell,H Briand,L Sun,D Lindemann,P J Clark,W Park,H L Lynch,A Adametz,S H Robertson,R Faccini,R Cenci,J R Fry,A M Gabareen,G Calderini,C Patrignani,F Liu,R Cowan,D Aston,R J Barlow,C L Davis,A Snyder,D J Payne,M Morii,R Andreassen,M Simard,J Chauveau,P C Bloom,D J Summers,D S Chao,A Stocchi,V Santoro,A Palano,R Prepost,U Mallik,D Bettoni,R Stroili,M Verderi,E Behn,F Ferrarotto,S Luitz,V Tisserand,A E Rubin,G P Dubois-Felsmann,C Hast,R H Schindler,M H Kelsey,D B Macfarlane,R F Schwitters,S Passaggio,D Lopes Pegna,M Carpinelli,R Cheaib,G Onorato,E Gabathuler,B Spaan,T S Mattison,J P Coleman,M Rama,I M Peruzzi,H R Band,A N Yushkov,G Finocchiaro,A M Lutz,R Godang,S Playfer,L Li Gioi,M Davier,R Y So,G Eigen,T M Hong,A Roodman,C Dallapiccola,B Hamilton,D J Bard,B Echenard,I Garzia,G Casarosa,R Frey,J G Smith,G J King,P Roudeau,R Bartoldus,F Anulli,D Kirkby,A Jawahery,M Fritsch,B Bhuyan,E Ben-Haim,A M Ruland,F Di Lodovico,C Touramanis,R Calabrese,G Grosdidier,M Lo Vetere,O Grünberg,D G Hitlin,R Kroeger,W Gradl,J L Ritchie,J Kroseberg,H H F Choi,J A Mckenna,A J Lankford,F Forti,M Wittgen,A Y Rakitin,M Gaspero,M Ebert,P Biassoni,A M Eisner,G Lynch,C Bünger,R Gorodeisky,G Piredda,G D Lafferty,E Prencipe,G Marchiori,C Bozzi,B Stugu,J Dorfan,N Gagliardi,J W Gary,F C Porter,T S Miyashita,K T Flood,E A Kravchenko,W Dunwoodie,B G Fulsom,A Calcaterra,E Paoloni,F Ferroni,S Pacetti,F Bianchi,W J Wisniewski,P Lund,G Vasseur,W R Innes,G Raven,K Honscheid,G Batignani,U Uwer,Yu G Kolomensky,V Ziegler,A Lusiani,S L Wu,D Gamba,X Nguyen,P Sonnek,M Munerato,C C Young,G M Vitug,H Atmacan,V Prasad,I M Nugent,A Seiden,P M Patel,Z J Guo,L Piemontese,M Mandelkern,R Schwierz,A V Telnov,S J Sekula,P Taras,K R Schubert,M S Alam,A Zallo,G De Nardo,S Nelson,M R Convery,M J Lewczuk,R Kowalewski,T Leddig,S Stracka,S Sitt,M Rotondo,B N Ratcliff,T Pulliam,C Hearty,M K Sullivan,C A Chavez,W S Lockman,B C Wray,B Oberhof,W T Ford,E Feltresi,T Lueck,D W G S Leith,D R Peimer,D J Asgeirsson,J Va’Vra,M D Sokoloff,W H Toki,F F Wilson,N Guttman,L Vitale,F Le Diberder,C Cartaro,J M Losecco,Uttam Paudel ,V Blinov ,H Ahmed,A J S Smith,C Chen,D Kovalskyi,Y B Pan ,C Sciacca,P F Harrison,D Bernard,J Ernst ,R Waldi,A Gaz,J M Izen,D Hutchcroft ,C West ,J Cochran,C L Lee,Z Huard,G Hamel De Monchenault,A J Martínez ,A V Gritsan,J Walsh ,J F Benitez,Yu I Skovpen,D R Muller,S Dasu,E Olaiya ,J E Brau ,S Akar,H Lacker ,R M White,K Grießinger ,W F Wang,M Purohit ,M Sigamani,J R Wilson,T Vazquez Schroeder ,R Sobie ,T Gershon ,J Garra Ticó ,S Banerjee ,A Pérez ,A J Bevan,G Simi,D N Brown,A Georges,S Zambito,E Robutti,М Перл ,A Cervelli,A Khan,X C Lou,G Jackson,M T Graham,A Denig ,Ph Leruste ,J Richman ,M Biasini,M A Giorgi,C Angelini,F Martínez-Vidal ,C Campagnari,S R Wagner,A Soffer,Д Деркач ,R C Field,A J Edwards,K Yu Todyshev ,A Salnikov ,H A Neal ,H Koch,G Sciolla,O R Long ,G Cowan,T Adye,A P Wagner,E Manoni,D Strom,E Graugés ,F U Bernlochner,P Lewis,P Kim,P Villanueva-Pérez ,C Jessop ,M Margoni,N Neri,B A Schumm,E Luppi,А Р Бузыкаев ,B Meadows ,T Latham ,E Guido,V Lüth ,J Olsen,L Cremaldi,B Lindquist,M R Monge,D Dujmić ,P Dauncey ,P Grenier,D Lange ,S Spanier ,A Rossi,R Kass,D Wright ,B Malaescu,P Patterí ,M Bomben,M Kocian ,Ch Yèche ,M Martinelli,D Moran ,A Randle-Conde

doi:10.1103/physrevd.88.071102

Abstract

We search for a low-mass scalar CP-odd Higgs boson, A0, produced in the radiative decay of the Upsilon resonance and decaying into a tau+tau- pair: Upsilon(1S)->gamma A0. The production of Upsilon(1S) mesons is tagged by Upsilon(2S)->pi+pi-Upsilon(1S) transitions, using a sample of (98.3+/-0.9) million Upsilon(2S) mesons collected by the BaBar detector. We find no evidence for a Higgs boson in the mass range 3.5 GeV<= m(A0)<=9.2 GeV, and combine these results with our previous search for the tau decays of the light Higgs in radiative Upsilon(3S) decays, setting limits on the coupling of A0 to the b/bbar quarks in the range 0.09-1.9. Our measurements improve the constraints on the parameters of the Next-to-Minimal-Supersymmetric Standard Model and similar theories with low-mass scalar degrees of freedom.

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