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

Abstract

Time-dependent measurements of the decays B_s^0(t)-->ϕK_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/ΨK_s and B_d^0(t)--> J/Ψπ^0.

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

Cited by in corpus (3)

• Measurement of the Lifetime Difference of $B_d$ Mesons: Possible and Worthwhile?
• The CKM phase $\alpha$ through $B\to a_0\pi$
• Difficulties in Obtaining Weak Phases from $b\to d$ Penguin Decays