CP Asymmetry in $\bar B^0\to K^- π^+$ from SUSY Flavor Changing Interactions

Details CP Asymmetry in $\bar B^0\to K^- π^+$ from SUSY Flavor Changing Interactions CP Asymmetry in $\bar B^0\to K^- π^+$ from SUSY Flavor Changing Interactions

2004-09-29

arxiv.org/abs/hep-ph/0409338v2

Phys.Rev. D71 (2005) 054006

Physics

High Energy Physics

High Energy Physics - Phenomenology

RevTeX4, 5 pages, 6 eps figures. Minor changes, conclusions unchanged

Scientific paper

10.1103/PhysRevD.71.054006

Recently Babar and Belle collaborations have measured direct CP asymmetry $A_{CP}=-0.114\pm 0.020$ in $\bar B^0 \to K^- \pi^+$. The experimental value is substantially different from QCD factorization prediction. We show that SUSY flavor changing neutral current interaction via gluonic dipole can explain the difference. CP asymmetries in other $B\to K\pi$ decays are predicted to be sizeable. Taking this asymmetry as a constraint, we find that the allowed SUSY parameter space is considerably reduced compared with constraint from $B\to X_s \gamma$ alone. We also find that the allowed time dependent CP asymmetries $S_f$ in $\bar B^0 \to \bar K^{* 0}\gamma \to \pi^0 K_S \gamma$ and $\bar B^0\to \phi K_S$ to be large. These predictions are quite different than those predicted in the Standard Model and can be tested in the near future.

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