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 2022/06
形態種別 その他
標題 Angular analysis of the low $K^{+}K^{-}$ invariant mass enhancement in $B^{+}\to K^{+}K^{-}π^{+}$ decays
執筆形態 その他
著者・共著者 Belle Collaboration,C. -L. Hsu,M. E. Sevior,I. Adachi,H. Aihara,S. Al Said,D. M. Asner,H. Atmacan,V. Aulchenko,T. Aushev,R. Ayad,V. Babu,S. Bahinipati,M. Bauer,P. Behera,K. Belous,J. Bennett,M. Bessner,V. Bhardwaj,B. Bhuyan,T. Bilka,J. Biswal,T. Bloomfield,A. Bobrov,A. Bozek,M. Bračko,P. Branchini,T. E. Browder,A. Budano,M. Campajola,D. Červenkov,M. -C. Chang,V. Chekelian,A. Chen,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,N.
概要 We study the decay $B^{+} \to K^+ K^- \pi^+$ and investigate the angular
distribution of $K^{+}K^{-}$ pairs with invariant mass below $1.1$ GeV/$c^2$.
This region exhibits both a strong enhancement in signal and very large direct
$CP$ violation. We construct a coherent sum model for the angular distribution
of $S$- and $P$-wave, and report the ratio of their amplitudes, the relative
phase and the forward-backward asymmetry. We also report absolute differential
branching fractions and direct $CP$ asymmetry for the decay in bins of
$M_{K^+K^-}$ and the differential branching fractions in bins of
$M_{K^+\pi^-}$. The results are based on a data sample that contains
$772\times10^6$ $B \bar{B}$ pairs collected at the $\Upsilon(4S)$ resonance
with the Belle detector at the KEKB asymmetric-energy $e^+ e^-$ collider. The
measured overall branching fraction and the direct $CP$ asymmetry are
$(5.38\pm0.40\pm0.35)\times 10^{-6}$ and $-0.170\pm0.073\pm0.017$,
respectively, where the first uncertainties are statistical and the second are
systematic.
DOI 10.1103/PhysRevD.107.032013
PermalinkURL http://arxiv.org/abs/2206.11445v2
researchmap用URL http://arxiv.org/pdf/2206.11445v2