Constraining New Physics in B-->pi+pi- with Reparametrization Invariance and QCD Factorization

Abstract

Usually, B->pi+pi- decays are expressed in terms of weak amplitudes explicitly dependent on the CKM weak phase alpha or gamma. In this letter, we show that the weak amplitudes can be rewritten such that a manifest dependence on beta emerges instead. Based on this, we constrain new-physics contributions to the CP-violating phase phi_d in B_0 anti-B_0 mixing. Further, we apply reparametrization invariance and use QCD factorization predictions to investigate the bounds on an additional new-physics amplitude in B->pi+pi-.

8 pages, 2 figures

References in corpus (24)

• Big Bang Nucleosynthesis (in "The Review of Particle Properties" 2004)
• QCD Factorization for $B\to \pi \pi$ Decays: Strong Phases and CP Violation in the Heavy Quark Limit
• Model-independent constraints on Delta F=2 operators and the scale of New Physics
• Averages of b-hadron and c-hadron Properties at the End of 2007
• Measurement of the Bs-Bsbar Oscillation Frequency
• Neutral B Meson Mixing in Unquenched Lattice QCD
• New Strategies to Extract $\beta$ and $\gamma$ from $B_d\to {\pi }^{+}{\pi }^{-}$ and $B_s\to K^{+}{K}^{-}$
• Probing New Physics through B Mixing: Status, Benchmarks and Prospects
• Spectator scattering at NLO in non-leptonic B decays: Tree amplitudes
• The UTfit Collaboration Report on the Status of the Unitarity Triangle beyond the Standard Model I. Model-independent Analysis and Minimal Flavour Violation
• Ambiguity-Free Measurement of cos2beta: Time-Integrated and Time-Dependent Angular Analyses of B->J/Psi K pi
• NNLO Vertex Corrections in charmless hadronic B decays: Imaginary part
• Spectator scattering at NLO in non-leptonic B decays: Leading penguin amplitudes
• NNLO vertex corrections in charmless hadronic B decays: Real part
• Studies of CP violation in B->J/psi K* decays
• Observation of Direct CP-Violation in B0 --> pi+pi- Decays and Model-Independent Constraints on phi2
• Hard spectator interactions in B to pi pi at order alpha_s^2
• SCET Analysis of B -> K pi, B -> K Kbar, and B -> pi pi Decays
• New Aspects of B -> pi pi, pi K and their Implications for Rare Decays
• Reparametrization invariance of B decay amplitudes and implications for new physics searches in B decays
• Charmless hadronic decays $B\to PP,PV,VV$ and new physics effects in the general two-Higgs doublet models
• Measurement of cos2beta in B0->D(*)h0 Decays with a Time-Dependent Dalitz Plot Analysis of D->KSpi+pi-
• R-Parity violation in B --> pi+ pi- decay
• Determination of gamma from charmless B^+/- -> M^0 M^+/- decays using U-spin