B -> M1 M2: Factorization, Charming Penguins, Strong Phases, and Polarization
High Energy Physics - Phenomenology
2009-11-10 v2 High Energy Physics - Experiment
Abstract
Using the soft-collinear effective theory we derive the factorization theorem for the decays B-> M1 M2 with M{1,2}= pi,K, rho,K*, at leading order in Lambda/E_M and Lambda/mb. The results derived here apply even if alpha_s(E_M Lambda) is not perturbative, and we prove that the physics sensitive to the E*Lambda scale is the same in B-> M1 M2 and B-> M form factors. We argue that c-cbar penguins could give long-distance effects at leading order. Decays to two transversely polarized vector mesons are discussed. Analyzing B-> pi pi we find predictions for B^0 -> pi^0 pi^0 and |V_{ub}| f_+(0) as a function of gamma.
Cite
@article{arxiv.hep-ph/0401188,
title = {B -> M1 M2: Factorization, Charming Penguins, Strong Phases, and Polarization},
author = {Christian W. Bauer and Dan Pirjol and Ira Z. Rothstein and Iain W. Stewart},
journal= {arXiv preprint arXiv:hep-ph/0401188},
year = {2009}
}
Comments
10 pages, v2 phenomenological analysis of B->pi pi added