We study the decay B+→K+K-π+ and investigate the angular distribution of K+K- pairs with invariant mass below 1.1 GeV/c2. 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 the 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 MK+K- and the differential branching fractions in bins of MK+π-. The results are based on a data sample that contains 772×106 BB¯ pairs collected at the ϒ(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider. The result favors the presence of S- and D-waves in low MK+K- region to the detriment of a P-wave.

Angular analysis of the low K+ K- invariant mass enhancement in B+ →K+ K- π+ decays / Hsu, C.-L., Sevior, M.E., Adachi, I., Aihara, H., Al Said, S., Asner, D.M., Atmacan, H., Aulchenko, V., Aushev, T., Ayad, R., Babu, V., Bahinipati, S., Bauer, M., Behera, P., Belous, K., Bennett, J., Bessner, M., Bhardwaj, V., Bhuyan, B., Bilka, T., et al.. - In: PHYSICAL REVIEW D. - ISSN 2470-0010. - 107:3(2023). [10.1103/PhysRevD.107.032013]

Angular analysis of the low K+ K- invariant mass enhancement in B+ →K+ K- π+ decays

Campajola M.;Choi Y.;De Nardo G.;Di Capua F.;Merola M.;Pardi S.;Russo G.;
2023

Abstract

We study the decay B+→K+K-π+ and investigate the angular distribution of K+K- pairs with invariant mass below 1.1 GeV/c2. 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 the 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 MK+K- and the differential branching fractions in bins of MK+π-. The results are based on a data sample that contains 772×106 BB¯ pairs collected at the ϒ(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider. The result favors the presence of S- and D-waves in low MK+K- region to the detriment of a P-wave.
2023
Angular analysis of the low K+ K- invariant mass enhancement in B+ →K+ K- π+ decays / Hsu, C.-L., Sevior, M.E., Adachi, I., Aihara, H., Al Said, S., Asner, D.M., Atmacan, H., Aulchenko, V., Aushev, T., Ayad, R., Babu, V., Bahinipati, S., Bauer, M., Behera, P., Belous, K., Bennett, J., Bessner, M., Bhardwaj, V., Bhuyan, B., Bilka, T., et al.. - In: PHYSICAL REVIEW D. - ISSN 2470-0010. - 107:3(2023). [10.1103/PhysRevD.107.032013]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11588/938513
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