Eur. Phys. J. C 22, 115-121 (2001)
Analysis of direct CP violation in decaysA.K. Giri1, R. Mohanta2 and M.P. Khanna1
1 Physics Department, Panjab University, Chandigarh-160 014, India
2 School of Physics, University of Hyderabad, Gachibowli, Hyderabad-500 046, India
(Received: 5 June 2001 / Revised version: 24 July 2001 / Published online: 19 September 2001 - © Springer-Verlag / Società Italiana di Fisica 2001 )
We investigate the possibility of observing direct CP violation in the decay modes and D0 D- within the standard model. Including the contributions arising from the tree, annihilation, QCD as well as electroweak penguins with both time- and space-like components, we find that the direct CP asymmetry in is very small, %, but in decay it can be as large as 4%. Approximately 107 charged B mesons are required to experimentally observe the CP asymmetry parameter for the latter case. Since this is easily accessible with the currently running B-factories, the decay mode may be pursued to look for CP violation.
© Società Italiana di Fisica, Springer-Verlag 2001