Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2001-03-01
Phys.Lett. B507 (2001) 142-146
Physics
High Energy Physics
High Energy Physics - Phenomenology
7 pages, minor clarifications to text
Scientific paper
10.1016/S0370-2693(01)00424-5
We propose studying the mechanism of factorization in exclusive decays of the form B->D(*)X by examining the differential decay rate as a function of the invariant mass of the light hadronic state X. If factorization works primarily due to the large N_c limit then its accuracy is not expected to decrease as the X invariant mass increases. However, if factorization is mostly a consequence of perturbative QCD then the corrections should grow with the X invariant mass. Combining data for hadronic tau decays and semileptonic B decays allows tests of factorization to be made for a variety of final states. We discuss the examples of B->D^*\pi^+\pi^-\pi^-\pi^0 and B->D^*\omega\pi^-. The mode B->D^*\omega\pi^- will allow a precision study of the dependence of the corrections to factorization on the invariant mass of the light hadronic state.
Ligeti Zoltan
Luke Michael
Wise Mark B.
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