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Improved measurement of Vub with inclusive semileptonic B decays |
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| Authors: | Bornheim A Lipeles E Pappas S P Shapiro A Sun W M Weinstein A J Masek G Paar H P Mahapatra R Morrison R J Briere R A Chen G P Ferguson T Tatishvili G Vogel H Adam N E Alexander J P Bebek C Berkelman K Blanc F Boisvert V Cassel D G Drell P S Duboscq J E Ecklund K M Ehrlich R Gibbons L Gittelman B Gray S W Hartill D L Heltsley B K Hsu L Jones C D Kandaswamy J Kreinick D L Magerkurth A Mahlke-Krüger H Meyer T O Mistry N B Nordberg E Palmer M Patterson J R Peterson D Pivarski J Riley D Sadoff A J Schwarthoff H Shepherd M R Thayer J G Urner D Valant-Spaight B Viehhauser G Warburton A Weinberger M |
| Institution: | California Institute of Technology, Pasadena, California 91125, USA. |
| Abstract: | We report a new measurement of the Cabibbo-Kobayashi-Maskawa parameter Vub made with a sample of 9.7 x 10(6) BB- events collected with the CLEO II detector. Using heavy quark theory, we combine the observed yield of leptons from semileptonic B decay in the end-point momentum interval 2.2-2.6 GeV/c with recent CLEO II data on B-->X(s)gamma to find Vub = (4.08+/-0.34+/-0.44+/-0.16+/-0.24)x10(-3), where the first two uncertainties are experimental and the last two are from theory. |
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