Search For B ->Tau Nu And B -> K Nu(Nu)Over-Bar Te Browder , Y Li , Jl Rodriguez , H Yamamoto , T Bergfeld , Bi Eisenstein , J Ernst , Ge Gladding , Gd Gollin , Rm Hans , E Johnson , I Karliner , Ma Marsh , M Palmer , C Plager , C Sedlack , M Selen , Jj Thaler , J Williams , Kw Edwards , R Janicek , Pm Patel , Aj Sadoff , R Ammar , A Bean , D Besson , R Davis , N Kwak , X Zhao , S Anderson , Vv Frolov , Y Kubota , Sj Lee , R Mahapatra , Jj O'Neill , R Poling , T Riehle , A Smith , Cj Stepaniak , J Urheim , S Ahmed , Ms Alam , Sb Athar , L Jian , L Ling , M Saleem , S Timm , F Wappler , A Anastassov , Je Duboscq , E Eckhart , Kk Gan , C Gwon , T Hart , K Honscheid , D Hufnagel , H Kagan , R Kass , Tk Pedlar , H Schwarthoff , Jb Thayer , E Von Toerne , Mm Zoeller , Sj Richichi , H Severini , P Skubic , A Undrus , S Chen , J Fast , Jw Hinson , J Lee , Dh Miller , Ei Shibata , Ipj Shipsey , V Pavlunin , D Cronin-Hennessy , Al Lyon , Eh Thorndike , Cp Jessop , H Marsiske , Ml Perl , V Savinov , D Ugolini , X Zhou , Te Coan , V Fadeyev , Y Maravin , I Narsky , R Stroynowski , T Wlodek , M Artuso , R Ayad , C Boulahouache , K Bukin , E Dambasuren , S Karamov , G Majumder , Gc Moneti , R Mountain , S Schuh , T Skwarnicki , S Stone , G Viehhauser , Jc Wang , A Wolf , J Wu , S Kopp , Ah Mahmood , Se Csorna , I Danko , Kw Mclean , S Marka , Z Xu , R Godang , K Kinoshita , Ic Lai , S Schrenk , G Bonvicini , D Cinabro , S Mcgee , Lp Perera , Gj Zhou , E Lipeles , Sp Pappas , M Schmidtler , A Shapiro , Wm Sun , Aj Weinstein , F Wurthwein , De Jaffe , G Masek , Hp Paar , Em Potter , S Prell , V Sharma , Dm Asner , A Eppich , Ts Hill , Rj Morrison , Ra Briere , T Ferguson , H Vogel , Be Behrens , K Berkelman , F Blanc , V Boisvert , Dg Cassel , M Dickson , Ps Drell , Km Ecklund , R Ehrlich , Ad Foland , P Gaidarev , L Gibbons , B Gittelman , Sw Gray , Dl Hartill , Bk Heltsley , Pi Hopman , Cd Jones , Dl Kreinick , M Lohner , A Magerkurth , To Meyer , Nb Mistry , E Nordberg , Jr Patterson , D Peterson , D Riley , Jg Thayer , Pg Thies , D Urner , B Valant-Spaight , A Warburton , P Avery , C Prescott , Ai Rubiera , J Yelton , J Zheng , G Brandenburg , A Ershov , Ys Gao , Dyj Kim , R Wilson PHYSICAL REVIEW LETTERS（2001）
摘要
We report results of a search for B --> tau nu in a sample of 9.7 x 10(6) charged B meson decays. We exclusively reconstruct the companion B decay to suppress background. We set an upper limit on the branching fraction B(B --> tau nu) < 8.4 X 10(-4) at 90% confidence level, We also establish B(B+/- --> K+/- nu <(nu )over bar >) < 2.4 X 10(-4) at 90% confidence level.
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关键词
confidence level, elementary particles
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