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Article
Final State Rescattering as a Contribution to B→ ργ
Physical Review D (1997)
  • John Donoghue, University of Massachusetts - Amherst
  • Eugene Golowich, University of Massachusetts - Amherst
  • Alexey Petrov, University of Massachusetts - Amherst
Abstract
We provide a new estimate of the long-distance component to the radiative transition B→py. Our mechanism involves the soft scattering of on-shell hadronic products of nonleptonic B decay, as in the chain B→pp→py. We employ a phenomenological fit to scattering data to estimate the effect. The specific intermediate states considered here modify the B→py decay rate at roughly the 528% 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 B0→r0g channel and hence will provide an uncertainty in the extraction of Vtd . This mechanism also affects the isospin relation between the rates for B2→r2g and B0→r0g and may generate CP asymmetries at experimentally observable levels.
Publication Date
1997
Citation Information
John Donoghue, Eugene Golowich and Alexey Petrov. "Final State Rescattering as a Contribution to B→ ργ" Physical Review D Vol. 55 (1997)
Available at: http://works.bepress.com/john_donoghue/117/