Charm rescattering contribution in rare Bc+ →K+K-π+ decay
Abstract
Following the experimental results from LHCb on the rare decay Bc+ →K-K+π+, we investigate the possibility where this process is dominated by a double charm rescattering. The Bc decay to double charm channels have a weak topology that is favored in comparison with the direct production of K-K+π+ in the final state, suppressed by quark annihilation. The decay amplitude for Bc+ →K-K+π+ with Bc decaying first to double charm channels is described by charm hadronic triangle loops, which reach the final state of interest after D D bar → K K bar or D+ Ds- →π+K- transitions. We show that these processes give rise to non-resonant amplitudes with a clear signature in the Dalitz plot. In a near future, the new data from LHCb run II will be able to confirme if the main hypotheses of this work is correct and the dominant mechanism to produce K+K+π- from the decay of Bc+ is through charm rescattering.
- Publication:
-
Physics Letters B
- Pub Date:
- October 2018
- DOI:
- 10.1016/j.physletb.2018.09.021
- arXiv:
- arXiv:1808.02945
- Bibcode:
- 2018PhLB..785..581B
- Keywords:
-
- Rare three-body decays;
- Hadronic loop;
- Rescattering;
- High Energy Physics - Phenomenology;
- High Energy Physics - Experiment
- E-Print:
- Physics Letters B785 (2018) 581-584