共查询到20条相似文献，搜索用时 15 毫秒
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Bebek C Berkelman K Blucher E Byrd J Cassel DG Cheu E Coffman DM Copie T Crawford G DeSalvo R DeWire JW Drell P Ehrlich R Galik RS Gittelman B Gray SW Halling AM Hartill DL Heltsley BK Kandaswamy J Kowalewski R Kreinick DL Kubota Y Lewis JD Mistry NB Mueller J Namjoshi R Nandi S Nordberg E O'Grady C Perticone D Peterson D Pisharody M Riley D Sapper M Silverman A Stone S Worden H Worris M Sadoff AJ Avery P Besson D Garren L Yelton J Bowcock T Kinoshita K Pipkin FM Procario M Wilson R Wolinski J 《Physical review letters》1989,62(1):8-11
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Coffman D DeJongh F Dubois GP Eigen G Hitlin DG Matthews CG Mincer A Richman J Weinstein AJ Wisniewski WJ Zhu Y Bolton T Bunnell KO Cassell RE Coward DH Kim PC Labs J Odian A Pitman D Schindler RH Toki W Wasserbaech S Drinkard JJ Gatto C Heusch CA Lockman WS Scarlatella M Sadrozinski HF Schalk TL Seiden A Weseler S Eisenstein BI Freese T Gladding G Izen JM Stockdale IE Tripsas B Mallik U Wang MZ Brown J Burnett TH Li AD Mir R Mockett PM Nemati B Parrish L Willutzki H 《Physical review D: Particles and fields》1992,45(7):2196-2211
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Lin SW Chang P Abe K Abe K Adachi I Aihara H Anipko D Aulchenko V Aushev T Bahinipati S Bakich AM Barberio E Bedny I Bitenc U Bizjak I Blyth S Bondar A Bozek A Bracko M Browder TE Chang MC Chao Y Chen A Chen KF Chen WT Cheon BG Chistov R Choi SK Choi Y Choi YK Dalseno J Dash M Dragic J Drutskoy A Eidelman S Fratina S Gabyshev N Garmash A Go A Golob B Ha H Haba J Hara T Hayashii H Hazumi M Heffernan D Hokuue T Hoshi Y Hou WS Hsiung YB Iijima T Ikado K Imoto A Inami K Ishikawa A Ishino H Itoh R 《Physical review letters》2007,99(12):121601
We report measurements of branching fractions for B --> K pi and B --> pi pi decays based on a data sample of 449 x 10(6) BB[over] pairs collected at the Upsilon(4S) resonance with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. We also measure the ratios of partial widths for B-->Kpi decays, namely R(c) identical with 2Gamma(B(+) --> K(+) pi(0))/Gamma(B(+) --> K(0) pi(+)) = 1.08+/-0.06+/-0.08 and R(n) identical with Gamma(B(0) --> K(+) pi(-))/2 Gamma(B(0) --> K(0) pi(0)) = 1.08+/-0.08+/-0.08, where the first and the second errors are statistical and systematic, respectively. These ratios are sensitive to enhanced electroweak penguin contributions from new physics; the new measurements are, however, consistent with standard model expectations. 相似文献
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Bortoletto D Brown DN Fast J McIlwain RL Miao T Miller DH Modesitt M Schaffner SF Shibata EI Shipsey IP Wang PN Battle M Ernst J Kroha H Roberts S Sparks K Thorndike EH Wang CH Dominick J Sanghera S Skwarnicki T Stroynowski R Artuso M He D Goldberg M Horwitz N Kennett R Moneti GC Muheim F Mukhin Y Playfer S Rozen Y Stone S Thulasidas M Vasseur G Zhu G Bartelt J Csorna SE Egyed Z Jain V Sheldon P Akerib DS Barish B Chadha M Chan S Cowen DF Eigen G Miller JS O'Grady C Urheim J Weinstein AJ 《Physical review letters》1993,71(12):1791-1795
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