|
新山 雅之 所属 京都産業大学 理学部 物理科学科 職種 教授 |
|
| 発行・発表の年月 | 2021/07 |
| 形態種別 | その他 |
| 標題 | Measurement of Differential Branching Fractions of Inclusive ${B \to X_u \, \ell^+\, ν_{\ell } }$ Decays |
| 執筆形態 | その他 |
| 著者・共著者 | Belle Collaboration,L. Cao,W. Sutcliffe,R. Van Tonder,F. U. Bernlochner,I. Adachi,H. Aihara,D. M. Asner,T. Aushev,V. Babu,S. Bahinipati,P. Behera,K. Belous,J. Bennett,M. Bessner,T. Bilka,J. Biswal,A. Bobrov,M. Bračko,P. Branchini,T. E. Browder,A. Budano,M. Campajola,D. Červenkov,M. -C. Chang,P. Chang,B. G. Cheon,K. Chilikin,H. E. Cho,K. Cho,S. -J. Cho,Y. Choi,S. Choudhury,D. Cinabro,S. Cunliffe,T. Czank,N. Dash,G. De Pietro,R. Dhamija,F. Di Capua,J. Dingfelder,Z. Doležal,T. V. Dong,S. Dubey,D. E |
| 概要 | The first measurements of differential branching fractions of inclusive
semileptonic ${B \to X_u \, \ell^+\, \nu_{\ell } }$ decays are performed using the full Belle data set of 711 fb$^{-1}$ of integrated luminosity at the $\Upsilon(4S)$ resonance and for $\ell = e, \mu$. Differential branching fractions are reported as a function of the lepton momentum, the four-momentum-transfer squared, light-cone momenta, the hadronic mass, and the hadronic mass squared. They are obtained by subtracting the backgrounds from semileptonic ${B \to X_c \, \ell^+\, \nu_{\ell } }$ decays and other processes, and corrected for resolution and acceptance effects. The measured distributions are compared to predictions from inclusive and hybrid ${B \to X_u \, \ell^+\, \nu_{\ell } }$ calculations. |
| DOI | 10.1103/PhysRevLett.127.261801 |
| PermalinkURL | http://arxiv.org/abs/2107.13855v2 |
| researchmap用URL | http://arxiv.org/pdf/2107.13855v2 |