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

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

2009-06-29

arxiv.org/abs/0906.5065v1

Phys.Lett.B681:264-268,2009

Physics

High Energy Physics

High Energy Physics - Phenomenology

8 pages, 2 figures

Scientific paper

10.1016/j.physletb.2009.10.022

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-.

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