Measurement of |Vub| from inclusive charmless semileptonic B decays
Phillip Urquijo,E. L. Barberio,I. Adachi,Hiroaki Aihara, K. Arinstein, A. M. Bakich, K. Belous, V. Bhardwaj, M. Bischofberger,A. Bozek, M. Bračko,T. E. Browder,Y. Chao,A. Chen,Byung Gu Cheon, R. Chistov,I. S. Cho,Y. Choi,Jeremy Dalseno, A. Das, M. Dash, W. Dungel,Semen Eidelman, N. Gabyshev, P. Goldenzweig,B. Golob, H. Ha,J. Haba, H. Hayashii,Yasuyuki Horii,Y. Hoshi,W. S. Hou,Y. B. Hsiung, H. J. Hyun,Toru Iijima, K. Inami,A. Ishikawa, R. Itoh,M. Iwasaki,D. H. Kah,J. H. Kang, N. Katayama,H. Kawai, T. Kawasaki, H. O. Kim, Jung-Hyun Kim,S. K. Kim, Y. I. Kim, Y. J. Kim,K. Kinoshita,B. R. Ko,Michal Kreps,P. Križan,Pavel Krokovny, T. Kuhr,A.S. Kuzmin,Y. J. Kwon,Sunghyon Kyeong,M. J. Lee, S. E. Lee,Sang Hoon Lee,T. Lesiak, J. Li,Antonio Limosani, Chang Liu,D. Liventsev, R. Louvot, F. Mandl, A. Matyja, S. McOnie,H. Miyata, Y. Miyazaki,R. Mizuk, T. Mori,Yasushi Nagasaka, E. Nakano, M. Nakao,Z. Natkaniec,S. Nishida,K. Nishimura,O. Nitoh, T. Nozaki, S. Ogawa,T. Ohshima, S. Okuno, W. Ostrowicz,H. Ozaki,G. Pakhlova,C. W. Park,H. K. Park,K. S. Park, R. Pestotnik,L. E. Piilonen, H. Sahoo,Y. Sakai,O. Schneider Physical Review Letters（2010）
摘要
We present the partial branching fraction for inclusive charmless semileptonic B decays and the corresponding value of the Cabibbo-Kobayashi- Maskawa matrix element |Vub|, using a multivariate analysis method to access ∼90% of the B→Xu ν phase space. This approach dramatically reduces the theoretical uncertainties from the b-quark mass and nonperturbative QCD compared to all previous inclusive measurements. The results are based on a sample of 657×106 BB pairs collected with the Belle detector. We find that ΔB(B→Xu ν;p *B>1.0GeV/c)=1. 963×(1±0.088stat±0.081syst)×10-3. Corresponding values of |Vub| are extracted using several theoretical calculations. © 2010 The American Physical Society.
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inclusive charmless semileptonic<mmlmath,display=inline><mmlmi>b</mmlmi></mmlmath>decays,of<mmlmath xmlnsmml=http//wwww3org/1998/math/mathml
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