TY  - JOUR
AU  - Pich, A.
AU  - Solomonidi, E.
AU  - Vale Silva, L.
PY  - 2023
DA  - 2023//
TI  - Final-state interactions in the CP asymmetries of charm-meson two-body decays
T2  - Phys. Rev. D
JO  - Physical Review D
SP  - 036026
EP  - 25pp
VL  - 108
AB  - Urgent theoretical progress is needed in order to provide an estimate in the Standard Model of the recent measurement by LHCb of direct CP violation in charm-meson two-body decays. Rescattering effects must be taken into account for a meaningful theoretical description of the amplitudes involved in such category of observables, as signaled by the presence of large strong phases. We discuss the computation of the latter effects based on a two-channel coupled dispersion relation, which exploits isospin-zero phase shifts and inelasticity parametrizations of data coming from the rescattering processes ππ→ππ, πK→πK, and ππ→K¯K. The determination of the subtraction constants of the dispersive integrals relies on the leading contributions to the transition amplitudes from the 1/NC counting, where NC is the number of QCD colors. Furthermore, we use the measured values of the branching ratios to help in selecting the nonperturbative inputs in the isospin limit, from which we predict values for the CP asymmetries. We find that the predicted level of CP violation is much below the experimental value.
UR  - https://arxiv.org/abs/2305.11951
UR  - https://doi.org/10.1103/PhysRevD.108.036026
DO  - 10.1103/PhysRevD.108.036026
N1  - exported from refbase (https://references.ific.uv.es/refbase/show.php?record=6091), last updated on Fri, 26 Apr 2024 14:59:15 +0000
ID  - Pich_etal2023
ER  -