Effects of hadronic loops on the direct CP violation of $B_{c}$

Details Effects of hadronic loops on the direct CP violation of $B_{c}$ Effects of hadronic loops on the direct CP violation of $B_{c}$

2007-07-06

arxiv.org/abs/0707.0919v3

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.

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