Search for CP Violation in D Meson Decays to phi pi+
Belle Collaboration: M. Stari\v{c}, H. Aihara, K. Arinstein, D. M., Asner, T. Aushev, A. M. Bakich, A. Bay, V. Bhardwaj, B. Bhuyan, A. Bozek, M., Bra\v{c}ko, T. E. Browder, A. Chen, P. Chen, B. G. Cheon, K. Chilikin, R., Chistov, I.-S. Cho, K. Cho, Y. Choi, Z. Dole\v{z}al
TL;DR
This paper reports a search for CP violation in D meson decays, measuring asymmetries in specific decay channels with high sensitivity, but finds no evidence of CP violation.
Contribution
The study provides the most sensitive measurement to date of CP asymmetry in D+ -> phi pi+ decays, improving previous limits by over five times.
Findings
No evidence of direct CP violation was observed.
Measured asymmetry is (+0.51 +- 0.28 +- 0.05)% in D+ -> phi pi+ decays.
The sensitivity of the search surpasses previous efforts.
Abstract
We search for CP violation in Cabibbo-suppressed charged D meson decays by measuring the difference between the CP violating asymmetries for the Cabibbo-suppressed decays D+ -> K+K-pi+ and the Cabibbo-favored decays Ds -> K+K-pi+ in the K+K- mass region of the phi resonance. Using 955/fb of data collected with the Belle detector we obtain A_CP(D+ -> phi pi+) = (+0.51 +- 0.28 +- 0.05)%. The measurement improves the sensitivity of previous searches by more than a factor of five. We find no evidence for direct CP violation.
Peer Reviews
No public reviews on file for this paper yet. If you reviewed it on a platform where reviews are public (OpenReview, ICLR, NeurIPS, ICML), you can paste yours below so the community can read it here.
Videos
No videos yet. Explain this paper in a talk, walkthrough, or lecture? Add one.