Can one detect new physics in I=0 and/or I=2 contributions to the decays B --> pi pi?

Abstract

We study the effects of new-physics contributions to B --> pi pi decays, which can be parametrized as four new complex quantities. A simple analysis is provided by utilizing the reparametrization invariance of the decay amplitudes. We find that six quantities can be reabsorbed into the definitions of Standard Model-like parameters. As a result, the usual isospin analysis provides only two constraints on new physics which are independent of estimates for the Standard Model contributions. In particular, we show that one is not sensitive to new physics affecting the I=0 amplitudes. On the other hand, I=2 new physics can be detected, and its parameters can be measured by using independent determinations of the weak phases. We obtain constraints on these new-physics parameters through a fit to the current experimental data.

8 pages, RevTex

References in corpus (7)

• CP Violation and the CKM Matrix: Assessing the Impact of the Asymmetric B Factories
• Evidence for Direct CP Violation in B0 -> K+- pi-+ Decays
• Improved Measurement of CP Asymmetries in B0 -> (ccbar)K0(*) Decays
• Improved Measurement of CP-Violation Parameters sin(2phi1) and |lambda|, B Meson Lifetimes, and B0-B0bar Mixing Parameter Delta m_d
• Isospin-breaking effects on alpha extracted in B --> pi pi, rho rho, rho pi
• Observation of B0->pi0pi0
• Reparametrization invariance of B decay amplitudes and implications for new physics searches in B decays

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• New physics in $B\to \pi \pi$ and $B\to \pi K$ decays
• Diagnostic for new physics in $B\to \pi K$ decays
• Measurements of New Physics in B -> pi pi Decays
• TASI Lectures on Flavor Physics
• Patterns of New Physics in B Decays
• A solution to B --> pi pi puzzle and B --> K K
• Weak Phases and CP Violation
• $B^0-{\bar{B}}^0$ entanglement for an ideal experiment on the direct CP violation ${\varphi }_3/\gamma$ phase