Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2007-07-06
Phys.Rev.D77:096010,2008
Physics
High Energy Physics
High Energy Physics - Phenomenology
15 pages, 3 figures, 2 tables. More discussion added
Scientific paper
10.1103/PhysRevD.77.096010
It is well known that the final state interaction plays an important role in the decays of $B$-meson. The contribution of the final state interaction which is supposed to be long-distance effects, to the concerned processes can interfere with that of the short-distance effects produced via the tree and/or loop diagrams at quark-gluon level. The interference may provide a source for the direct CP violation $\mathcal{A}_{CP}$ in the process $B_{c}^{+}\to D^{0}\pi^{+}$. We find that a typical value of $\mathcal{A}_{CP}$ when the final state interaction effect is taken into account can be about -22% which is different from that without the final state interaction effect. Therefore, when we extract information on CP violation from the data which will be available at LHCb and the new experiments in $B$-factories, the contribution from the final state interaction must be included. This study may be crucial for searching new physics in the future.
Li Xue-Qian
Liu Xiang
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