Measurement of branching fraction and direct CP asymmetry in charmless B+ →K+K-π+ decays at Belle
Journal
Physical Review D
Journal Volume
96
Journal Issue
3
Date Issued
2017
Author(s)
Hsu C.-L. et al.
Dossett, D.
Sevior, M.E.
Adachi, I.
Aihara, H.
Al Said, S.
Asner, D.M.
Atmacan, H.
Aulchenko, V.
Aushev, T.
Ayad, R.
Badhrees, I.
Abstract
We report a study of the charmless hadronic decay of the charged B meson to the three-body final state K+K-π+. The results are based on a data sample that contains 772×106 BB; pairs collected at the ?(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider. The measured inclusive branching fraction and direct CP asymmetry are (5.38±0.40±0.35)×10-6 and -0.170±0.073±0.017, respectively, where the first uncertainties are statistical and the second are systematic. The K+K- invariant mass distribution of the signal candidates shows an excess in the region below 1.5 GeV/c2, which is consistent with the previous studies from BABAR and LHCb. In addition, strong evidence of a large direct CP asymmetry is found in the low K+K- invariant-mass region. ? 2017 American Physical Society.
Type
journal article