CP violation in two-body hadronic decays of $B_c$ mesons

Youshan Dai; Dongsheng Du

doi:doi:10.1007/s100530050499

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2024 Impact factor 4.8

Particles and Fields

Eur. Phys. J. C 9, 557-564
DOI 10.1007/s100529900073

CP violation in two-body hadronic decays of B_c mesons

Youshan Dai^1,2 - Dongsheng Du¹

¹ Institute of High Energy Physics, Chinese Academy of Sciences, P.O. Box 918(4), Beijing, 100039, P.R. China
² Department of Physics, Hangzhou University, Hangzhou, 310028, P.R. China

Received: 17 December 1998 / Published online: 30 June 1999

Abstract
Using the next-to-leading-order low-energy effective Hamiltonian, the CP asymmetries for B_c-meson decays into meson pairs are calculated in the spectator approximation. We do not compute the hadronic matrix elements directly; instead, we use the amplitude ratios to estimate the CP asymmetries. This is quite different from previous treatments in the literature. The values of the momentum squared carried by the virtual particles in timelike penguin diagrams are also carefully discussed. From our calculated results, the best decay modes to observe CP violation in B_c decays would be $B_{c}^-\rightarrow{\bar D}^{*0}K^{*-}$ , ${\bar D}^{0}K^{*-}$ , ${\bar D}^{*0} K^{-}$ , ${\bar D}^{0}K^{-}$ , and $B_{c}^-\rightarrow{\eta}_{c}D^{-}$ ,each of them needs about 10⁸ of $B_{c}^{\pm}$ events in experiment.