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 2020/08
形態種別 その他
標題 Rediscovery of $B \to φK^{(*)}$ decays and measurement of the longitudinal polarization fraction $f_L$ in $B \to φK^{*}$ decays using the Summer 2020 Belle II dataset
執筆形態 その他
著者・共著者 F. Abudinén,I. Adachi,R. Adak,K. Adamczyk,P. Ahlburg,J. K. Ahn,H. Aihara,N. Akopov,A. Aloisio,F. Ameli,L. Andricek,N. Anh Ky,D. M. Asner,H. Atmacan,V. Aulchenko,T. Aushev,V. Aushev,T. Aziz,V. Babu,S. Bacher,S. Baehr,S. Bahinipati,A. M. Bakich,P. Bambade,Sw. Banerjee,S. Bansal,M. Barrett,G. Batignani,J. Baudot,A. Beaulieu,J. Becker,P. K. Behera,M. Bender,J. V. Bennett,E. Bernieri,F. U. Bernlochner,M. Bertemes,M. Bessner,S. Bettarini,V. Bhardwaj,B. Bhuyan,F. Bianchi,T. Bilka,S. Bilokin,D. Biswas,A
概要 We utilize a sample of 34.6 fb$^{-1}$, collected by the Belle II experiment
at the SuperKEKB asymmetric energy $e^+e^-$ collider, to search for the $B^+
\to \phi K^+$, $B^+ \to \phi K^{*+}$, $B^0 \to \phi K^0_S$, and $B^0 \to \phi
K^{*0}$ decays. Charmless hadronic $B$ decays represent an important part of
the Belle II physics program, and are an ideal benchmark to test the detector
capabilities in terms of tracking efficiency, charged particle identification,
vertexing, and advanced analysis techniques. Each channel is observed with a
significance that exceeds 5 standard deviations, and we obtain measurements of
their branching ratios that are in good agreement with the world averages. For
the $B \to \phi K^*$ modes, we also perform a measurement of the longitudinal
polarization fraction $f_L$.
PermalinkURL http://arxiv.org/abs/2008.03873v1
researchmap用URL http://arxiv.org/pdf/2008.03873v1