Publication Date
1997
Journal or Book Title
PHYSICAL REVIEW D
Abstract
We provide a new estimate of the long-distance component to the radiative transition $B \to \rho \gamma$. Our mechanism involves the soft-scattering of on-shell hadronic products of nonleptonic $B$ decay, as in the chain $B \to \rho\rho \to \rho\gamma$. We employ a phenomenological fit to scattering data to estimate the effect. The specific intermediate states considered here modify the $B \to \rho \gamma$ decay rate at roughly the $5 \to 8%$ level, although the underlying effect has the potential to be larger. Contrary to other mechanisms of long distance physics which have been discussed in the literature, this yields a non-negligible modification of the $B^0 \to \rho^0 \gamma$ channel and hence will provide an uncertainty in the extraction of $V_{td}$. This mechanism also affects the isospin relation between the rates for $B^- \to \rho^-\gamma$ and $B^0 \to \rho^0 \gamma$ and may generate CP asymmetries at experimentally observable levels.
Pages
2657-2662
Volume
55
Issue
5
Recommended Citation
Donoghue, JF; Golowich, Eugene; and Petrov, AA, "Final state rescattering as a contribution to B->rho gamma" (1997). PHYSICAL REVIEW D. 130.
Retrieved from https://scholarworks.umass.edu/physics_faculty_pubs/130
Comments
This is a pre-published version which is collected from arXiv. The published version is located at http://prd.aps.org/abstract/PRD/v55/i5/p2657_1