Searching for New Physics in the b->d FCNC using B_s^0(t)->φK_s and B_d^0(t)->K^0\bar{K}^0

Details Searching for New Physics in the b->d FCNC using B_s^0(t)->φK_s and B_d^0(t)->K^0\bar{K}^0 Searching for New Physics in the b->d FCNC using B_s^0(t)->φK_s and B_d^0(t)->K^0\bar{K}^0

1999-04-13

arxiv.org/abs/hep-ph/9904311v3

Phys.Lett.B458:361-369,1999

Physics

High Energy Physics

High Energy Physics - Phenomenology

16 pages, LaTeX, Modified and accepted for publication in Phys.Lett.B

Scientific paper

10.1016/S0370-2693(99)00591-2

Time-dependent measurements of the decays B_s^0(t)-->\phi K_s and B_d^0(t) --> K^0 \bar{K}^0 can be used to compare the weak phases of B_d^0-\bar{B}_d^0 mixing and the t-quark contribution to the b->d penguin. Since these two phases are equal in the standard model, any discrepancy would be a sign of new physics, specifically in the b->d flavour-changing neutral current (FCNC). The method can be applied to other pairs of decays, such as B_s^0(t)--> J/\Psi K_s and B_d^0(t)--> J/\Psi \pi^0.

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