Measurement of the moments of the photon energy spectrum in B→Xsγ decays and determination of |Vcb| and mb at Belle

C. Schwanda, P. Urquijo, E. Barberio, A. Limosani, I. Adachi, H. Aihara, K. Arinstein, T. Aushev, S. Bahinipati, A. M. Bakich, V. Balagura, I. Bedny, K. Belous, U. Bitenc, A. Bondar, A. Bozek, M. Bračko, M. C. Chang, A. Chen, W. T. ChenB. G. Cheon, R. Chistov, I. S. Cho, Y. Choi, J. Dalseno, M. Dash, A. Drutskoy, S. Eidelman, B. Golob, H. Ha, J. Haba, T. Hara, K. Hayasaka, H. Hayashii, M. Hazumi, D. Heffernan, Y. Hoshi, W. S. Hou, H. J. Hyun, K. Inami, A. Ishikawa, Hirokazu Ishino, R. Itoh, M. Iwasaki, Y. Iwasaki, D. H. Kah, J. H. Kang, P. Kapusta, N. Katayama, H. Kichimi, H. J. Kim, Y. J. Kim, K. Kinoshita, S. Korpar, Y. Kozakai, P. Križan, P. Krokovny, R. Kumar, C. C. Kuo, Y. Kuroki, A. Kuzmin, Y. J. Kwon, J. S. Lee, M. J. Lee, S. E. Lee, T. Lesiak, J. Li, C. Liu, D. Liventsev, F. Mandl, A. Matyja, S. McOnie, T. Medvedeva, W. Mitaroff, H. Miyake, H. Miyata, Y. Miyazaki, R. Mizuk, G. R. Moloney, E. Nakano, M. Nakao, Z. Natkaniec, S. Nishida, O. Nitoh, S. Noguchi, T. Nozaki, S. Ogawa, T. Ohshima, S. Okuno, P. Pakhlov, G. Pakhlova, H. Palka, C. W. Park, H. Park, L. S. Peak, R. Pestotnik, L. E. Piilonen, H. Sahoo, Y. Sakai, O. Schneider, J. Schümann, R. Seidl, A. Sekiya, K. Senyo, M. E. Sevior, M. Shapkin, H. Shibuya, J. G. Shiu, B. Shwartz, A. Somov, S. Stanič, M. Starič, T. Sumiyoshi, F. Takasaki, M. Tanaka, G. N. Taylor, Y. Teramoto, I. Tikhomirov, K. Trabelsi, S. Uehara, Y. Unno, S. Uno, G. Varner, K. E. Varvell, K. Vervink, S. Villa, C. H. Wang, P. Wang, Y. Watanabe, R. Wedd, E. Won, B. D. Yabsley, H. Yamamoto, Y. Yamashita, Z. P. Zhang, A. Zupanc

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Abstract

Using the previous Belle measurement of the inclusive photon energy in B→Xsγ decays, we determine the first and second moments of this spectrum for minimum photon energies in the B meson rest frame ranging from 1.8 to 2.3 GeV. Combining these measurements with recent Belle data on the lepton energy and hadronic mass moments in B→Xcℓν decays, we perform fits to theoretical expressions derived in the 1S and kinetic mass schemes and extract the magnitude of the Cabibbo-Kobayashi-Maskawa matrix element Vcb, the b-quark mass, and other nonperturbative parameters. In the 1S scheme analysis we find |Vcb|=(41.56±0.68(fit)±0.08(τB))×10-3 and mb1S=(4.723±0.055)GeV. In the kinetic scheme, we obtain |Vcb|=(41.58±0.69(fit)±0.08(τB)±0.58(th))×10-3 and mbkin=(4.543±0.075)GeV.

Original languageEnglish
Article number032016
JournalPhysical Review D
Volume78
Issue number3
DOIs
Publication statusPublished - Aug 27 2008
Externally publishedYes

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ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Nuclear and High Energy Physics
  • Mathematical Physics

Cite this

Schwanda, C., Urquijo, P., Barberio, E., Limosani, A., Adachi, I., Aihara, H., Arinstein, K., Aushev, T., Bahinipati, S., Bakich, A. M., Balagura, V., Bedny, I., Belous, K., Bitenc, U., Bondar, A., Bozek, A., Bračko, M., Chang, M. C., Chen, A., ... Zupanc, A. (2008). Measurement of the moments of the photon energy spectrum in B→Xsγ decays and determination of |Vcb| and mb at Belle. Physical Review D, 78(3), [032016]. https://doi.org/10.1103/PhysRevD.78.032016