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Evidence for an Excess ofB ̄→D(*)τ−ν ̄τ</...
Authors
J. Allison,G. Simi
V. Tisserand,L. Garrido,E. Graugés,A. Palano,G. Eigen,B. Stugu,D. Brown,L. Kerth,M. Martinelli,G. Lynch,H. Koch,T. Schroeder,D. Asgeirsson,C. Hearty,T. Mattison,J. McKenna,R. So,D. Santos,V. Blinov,А. Бузыкаев,E. Solodov,В. Голубев,P. Krokovny,A. Onuchin,S. Serednyakov,Yu. Skovpen,K. Todyshev,A. Yushkov,M. Bondioli,D. Kirkby,P. Harrison,M. Mandelkern,H. Atmacan,C. Touramanis,F. Liu,O. Long,G. Vitug,E. Clement,T. Hong,D. Kovalskyi,J. Richman,Christopher West,A. Eisner,J. Kroseberg,W. Lockman,A. Martínez,B. Schumm,A. Seiden,D. Chao,C. Cheng,B. Echenard,K. Flood,D. Hitlin,P. Ongmongkolkul,F. Porter,A. Rakitin,R. Andreassen,A. Grecu,James Mead,C. Dallapiccola,L. Sun,E. Gabathuler,M. Rotondo,A. Gaz,C. Chen,J. Smith,S. Wagner,R. Ayad,B. Spaan,R. Barlow,R. Schwierz,D. Bernard,M. Negrini,Y. Coadou,S. Playfer,D. Bettoni,C. Bozzi,R. Calabrese,G. Cibinetto,E. Fioravanti,I. Garzia,E. Luppi,M. Munerato,L. Piemontese,G. Rong,G. Lafferty,A. Calcaterra,R. Sangro,G. Finocchiaro,P. Patteri,I. Peruzzi,M. Piccolo,G. Rizzo,R. Contri,M. Masuda,M. Vetere,M. Monge,S. Passaggio,C. Patrignani,B. Bhuyan,V. Prasad,C. Lee,M. Morii,S. Majewski,A. Adametz,A. Ukleja,H. Lacker,T. Lueck,U. Mallik,J. Cochran,W. Meyer,L. Vitale,J. Serrano,A. Gritsan,V. Azzolini,N. Arnaud,M. Davier,Д. Деркач,G. Grosdidier,D. Leith,B. Malaescu,P. Roudeau,L. Paula,S. Stone,G. Wormser,D. Lange,D. Wright,C. Chavez,J. Coleman,J. Fry,D. Payne,A. Bevan,F. Lodovico,G. Cowan,C. Davis,A. Denig,M. Fritsch,W. Gradl,K. Grießinger,A. Hafner,R. Cenci,F. Forti,R. Lefèvre,A. Jawahery,G. Sciolla,D. Lindemann,P. Patel,N. Neri,L. Cremaldi,R. Godang,R. Kroeger,J. Izen,D. Summers,X. Nguyen,M. Simard,P. Taras,L. Lista,C. Sciacca,G. Raven,C. Jessop,J. LoSecco,W. Wang,K. Honscheid,R. Frey,N. Sinev,D. Strom,E. Feltresi,M. Margoni,S. Akar,E. Ben-Haim,G. Ricca,G. Bonneaud,H. Briand,J. Chauveau,O. Hamon,J. Ocariz,S. Sitt,R. Covarelli,S. Pacetti,A. Rossi,C. Angelini,S. Bettarini,F. Bianchi,M. Giorgi,J. Walsh,D. Pegna,R. Bartoldus,F. Ferrarotto,F. Ferroni,P. Jackson,L. Gioi,M. Mazzoni,W. Dunwoodie,C. Bünger,O. Grünberg,T. Hartmann,H. Schröder,T. Adye,F. Wilson,G. Monchenault,G. Vasseur,Ch. Yèche,M. Cristinziani,J. Dorfan,M. Sevilla,B. Fulsom,A. Gabareen,M. Graham,P. Grenier,C. Hast,W. Innes,P. Kim,M. Kocian,A. Lister,S. Luitz,V. Lüth,H. Lynch,D. MacFarlane,A. Roodman,J. Albert,S. Nelson,J. Nash,J. Schwiening,A. Snyder,M. Svatos,M. Sullivan,J. Va’vra,A. Wagner,R. Wilson,M. Wittgen,C. Tully,C. Young,V. Ziegler,W. Park,M. Purohit,R. White,T. Miyashita,E. Puccio,M. Alam,N. Guttman,A. Soffer,S. Spanier,J. Ritchie,A. Ruland,X. Lou,A. Oyanguren,Sw. Banerjee,R. Kowalewski,H. Choi,R. Sobie,E. Charles,S. Wu,Tae Hong,A. Massafferri,R. Kass,Stephen Wagner,Yann Coadou,M. Casasús,E. Guido
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,Stephanie MajewskiJournal
Published
Sep 6, 2012
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Abstract
Based on the full BABAR data sample, we report improved measurements of the ratios R(D(*))=B(B[over ¯]→D(*)τ(-)ν[over ¯](τ))/B(B[over ¯]→D(*)ℓ(ℓ)(-)ν[over ¯](ℓ)), where ℓ is either e or μ. These ratios are sensitive to new physics contributions in the form of a charged Higgs boson. We measure R(D)=0.440±0.058±0.042 and R(D(*))=0.332±0.024±0.018, which exceed the standard model expectations by 2.0σ and 2.7σ, respectively. Taken together, our results disagree with these expectations at the 3.4σ level. This excess cannot be explained by a charged Higgs boson in the type II two-Higgs-doublet model.
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