First Simultaneous Determination of Inclusive and Exclusive |Vub |

L. Cao, F. Bernlochner, K. Tackmann, I. Adachi, H. Aihara, S. Al Said, D. M. Asner, H. Atmacan, T. Aushev, R. Ayad, V. Babu, S. Bahinipati, Sw Banerjee, P. Behera, K. Belous, J. Bennett, M. Bessner, B. Bhuyan, T. Bilka, D. BiswasA. Bobrov, D. Bodrov, J. Borah, A. Bozek, M. Bračko, P. Branchini, T. E. Browder, A. Budano, M. Campajola, D. Červenkov, M. C. Chang, B. G. Cheon, K. Chilikin, H. E. Cho, K. Cho, S. J. Cho, S. K. Choi, Y. Choi, S. Choudhury, D. Cinabro, S. Cunliffe, S. Das, G. De Marino, G. De Nardo, G. De Pietro, R. Dhamija, F. Di Capua, J. Dingfelder, Z. DoleŽal, T. V. Dong, T. Ferber, D. Ferlewicz, A. Frey, B. G. Fulsom, V. Gaur, A. Garmash, A. Giri, P. Goldenzweig, E. Graziani, T. Gu, Y. Guan, K. Gudkova, C. Hadjivasiliou, S. Halder, T. Hara, O. Hartbrich, K. Hayasaka, H. Hayashii, M. T. Hedges, D. Herrmann, W. S. Hou, C. L. Hsu, T. Iijima, K. Inami, N. Ipsita, A. Ishikawa, R. Itoh, M. Iwasaki, W. W. Jacobs, E. J. Jang, S. Jia, Y. Jin, K. K. Joo, D. Kalita, K. H. Kang, C. Kiesling, C. H. Kim, D. Y. Kim, K. H. Kim, Y. K. Kim, K. Kinoshita, P. Kodyš, T. Konno, A. Korobov, S. Korpar, E. Kovalenko, P. KriŽan, P. Krokovny, T. Kuhr, R. Kumar, K. Kumara, A. Kuzmin, Y. J. Kwon, J. S. Lange, M. Laurenza, S. C. Lee, P. Lewis, J. Li, L. K. Li, Y. Li, J. Libby, Y. R. Lin, D. Liventsev, T. Luo, Y. Ma, A. Martini, M. Masuda, T. Matsuda, D. Matvienko, S. K. Maurya, F. Meier, M. Merola, F. Metzner, K. Miyabayashi, R. Mizuk, G. B. Mohanty, M. Mrvar, R. Mussa, I. Nakamura, M. Nakao, Z. Natkaniec, A. Natochii, L. Nayak, M. Nayak, N. K. Nisar, S. Nishida, K. Ogawa, S. Ogawa, H. Ono, P. Oskin, P. Pakhlov, G. Pakhlova, T. Pang, S. Pardi, H. Park, J. Park, S. H. Park, A. Passeri, S. Patra, S. Paul, T. K. Pedlar, R. Pestotnik, L. E. Piilonen, T. Podobnik, E. Prencipe, M. T. Prim, N. Rout, M. Rozanska, G. Russo, S. Sandilya, A. Sangal, L. Santelj, V. Savinov, G. Schnell, C. Schwanda, Y. Seino, K. Senyo, M. E. Sevior, W. Shan, M. Shapkin, C. Sharma, C. P. Shen, J. G. Shiu, B. Shwartz, A. Sokolov, E. Solovieva, M. Starič, Z. S. Stottler, M. Sumihama, W. Sutcliffe, M. Takizawa, U. Tamponi, K. Tanida, F. Tenchini, R. Tiwary, K. Trabelsi, M. Uchida, T. Uglov, Y. Unno, K. Uno, S. Uno, Y. Ushiroda, Y. Usov, S. E. Vahsen, G. Varner, K. E. Varvell, A. Vossen, D. Wang, E. Wang, M. Z. Wang, S. Watanuki, O. Werbycka, E. Won, X. Xu, B. D. Yabsley, W. Yan, S. B. Yang, J. H. Yin, Y. Yook, Y. Yusa, Z. P. Zhang, V. Zhilich, V. Zhukova

Research output: Contribution to journalArticlepeer-review

Abstract

The first simultaneous determination of the absolute value of the Cabibbo-Kobayashi-Maskawa matrix element Vub using inclusive and exclusive decays is performed with the full Belle data set at the (4S) resonance, corresponding to an integrated luminosity of 711 fb-1. We analyze collision events in which one B meson is fully reconstructed in hadronic modes. This allows for the reconstruction of the hadronic Xu system of the semileptonic b→uν¯ decay. We separate exclusive B→πν¯ decays from other inclusive B→Xuν¯ and backgrounds with a two-dimensional fit that utilizes the number of charged pions in the Xu system and the four-momentum transfer q2 between the B and Xu systems. Combining our measurement with information from lattice QCD and QCD calculations of the inclusive partial rate as well as external experimental information on the shape of the B→πν¯ form factor, we determine |Vubexcl|=(3.78±0.23±0.16±0.14)×10-3 and |Vubincl|=(3.88±0.20±0.31±0.09)×10-3, respectively, with the uncertainties being the statistical error, systematic errors, and theory errors. The ratio of |Vubexcl|/|Vubincl|=0.97±0.12 is compatible with unity.

Original languageEnglish
Article number211801
JournalPhysical Review Letters
Volume131
Issue number21
DOIs
StatePublished - 24 Nov 2023

Fingerprint

Dive into the research topics of 'First Simultaneous Determination of Inclusive and Exclusive |Vub |'. Together they form a unique fingerprint.

Cite this