Measurement Of Vertical Bar V-Ub Vertical Bar Using Inclusive B -> X(U)L Nu Decays With A Novel X-U-Reconstruction Method

H. Kakuno,K. Abe,I. Adachi,H. Aihara,Y. Asano,T. Aso,V. Aulchenko,T. Aushev, A. Bakich, Y. Ban, S. Banerjee, I. Bizjak,A. Bondar, A. Bozek,M. Bračko,T. Browder, Y. Chao,B. Cheon,R. Chistov,S.-K. Choi, Y. Choi,A. Chuvikov,S. Cole,M. Danilov,M. Dash,L. Dong,J. Dragic,A. Drutskoy,S. Eidelman,V. Eiges,N. Gabyshev,A. Garmash, T. Gershon,G. Gokhroo,B. Golob,J. Haba,C. Hagner,T. Hara,M. Hazumi, I. Higuchi,L. Hinz,T. Hokuue,Y. Hoshi,W.-S. Hou,H.-C. Huang, T. Iijima,K. Inami,A. Ishikawa,R. Itoh, H. Iwasaki, Y. Iwasaki, J. Kang,P. Kapusta,N. Katayama, H. Kawai, T. Kawasaki, H. Kichimi, H. Kim,J. Kim,K. Kinoshita,S. Korpar,P. Križan,P. Krokovny,Y.-J. Kwon,G. Leder, S. Lee,T. Lesiak, J. Li, A. Limosani,S.-W. Lin,J. MacNaughton,F. Mandl,A. Matyja,Y. Mikami,W. Mitaroff, K. Miyabayashi,H. Miyata,G. Moloney, T. Mori,T. Nagamine, Y. Nagasaka,T. Nakadaira,E. Nakano, M. Nakao,H. Nakazawa,Z. Natkaniec,S. Nishida,O. Nitoh,T. Nozaki,S. Ogawa, T. Ohshima,S. Okuno,S. Olsen,W. Ostrowicz,H. Ozaki,P. Pakhlov, C. Park, H. Park,K. Park,N. Parslow,L. Peak,L. Piilonen,H. Sagawa,S. Saitoh, Y. Sakai,O. Schneider,A. Schwartz, S. Semenov,K. Senyo,M. Sevior,H. Shibuya,B. Shwartz,V. Sidorov, J. Singh,N. Soni,S. Stanič,M. Starič,A. Sugiyama,T. Sumiyoshi,S. Suzuki,O. Tajima,F. Takasaki,K. Tamai, M. Tanaka,Y. Teramoto,T. Tomura,T. Tsuboyama, T. Tsukamoto, S. Uehara,K. Ueno,T. Uglov, Y. Unno,S. Uno, G. Varner,K. Varvell, C. Wang, J. Wang, M.-Z. Wang,M. Watanabe, Y. Watanabe,B. Yabsley,Y. Yamada,A. Yamaguchi, H. Yamamoto, Y. Yamashita,M. Yamauchi,H. Yanai,Heyoung Yang,Y. Yuan,Y. Yusa, J. Zhang,Z. Zhang,V. Zhilich,D. Žontar

PHYSICAL REVIEW LETTERS（2004）

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摘要

We report the measurement of an inclusive partial branching fraction for charmless semileptonic B decay and the extraction of \V-ub\. Candidates for B-->X-u.nu are identified with a novel X-u reconstruction method based on neutrino reconstruction via missing 4-momentum and a technique called "simulated annealing." Based on 86.9 fb(-1) of data taken with the Belle detector, we obtain DeltaB(B-->X-u.nu;M-X<1.7 GeV/c(2),q(2)>8.0 GeV2/c(2))=[7.37+/-0.89(stat)+/-1.12(syst)+/-0.55(b-->c)+/-0.24(b-->u)]x10(-4) and determine \V-ub\=[4.66+/-0.28(stat)+/-0.35(syst)+/-0.17(b-->c)+/-0.08(b-->u)+/-0.58(theory)]x10(-3).

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