Systematic Error on Weak Phase $γ$ from $B \to π^+ π^-$ and $B \to K π$

Details Systematic Error on Weak Phase $γ$ from $B \to π^+ π^-$ and $B \to K π$ Systematic Error on Weak Phase $γ$ from $B \to π^+ π^-$ and $B \to K π$

2007-04-25

arxiv.org/abs/0704.3459v3

Phys.Lett.B651:166-170,2007

Physics

High Energy Physics

High Energy Physics - Phenomenology

Comments and figure added

Scientific paper

10.1016/j.physletb.2007.06.030

When CP asymmetries in $B^0(t)\to \pi^+ \pi^-$ are combined using broken flavor SU(3) with decay rates for $B^+\to K^0\pi^+$ and/or $B^0\to K^+\pi^-$, one can obtain stringent limits on the weak phase $\gamma$ which are consistent with those obtained from other CKM constraints. Experimental data in the past few years have improved to the extent that systematic errors associated with uncertainty in SU(3) symmetry breaking dominate the determination of $\gamma$. We obtain a value $\gamma =(73 \pm 4^{+10}_{-8})^\circ$, where the first error is statistical while the second one is systematic.

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