English

Determination of the angle gamma using B -> D* V modes

High Energy Physics - Phenomenology 2008-11-26 v1

Abstract

We propose a method to determine the angle γ=arg(Vub)\gamma=arg(V_{ub}), using the BDVB\to D^*V (V=K,ρV=K^*, \rho) modes. The DD^* is considered to decay to DπD \pi. An interference of the BD0VB \to D^{*0}V and BD0ˉVB \to \bar {D^{*0}}V amplitudes is achieved by looking at a common final state ff, in the subsequent decays of D0/D0ˉD^0/\bar{D^0}. A detailed analysis of the angular distribution, allows determination, not only of γ\gamma and Vub|V_{ub}|, but also all the hadronic amplitudes and strong phases involved. No prior knowledge of doubly Cabibbo suppressed branching ratios of DD are required. Large CP violating asymmetries (30\sim30 % for γ=30o\gamma=30^o) are possible if D0ˉf\bar{D^0} \to f is doubly Cabbibo suppressed, while D0fD^0 \to f is Cabbibo allowed, for decays of B+B^+ or B0B^0.

Keywords

Cite

@article{arxiv.hep-ph/9712502,
  title  = {Determination of the angle gamma using B -> D* V modes},
  author = {Nita Sinha and Rahul Sinha},
  journal= {arXiv preprint arXiv:hep-ph/9712502},
  year   = {2008}
}

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12 Pages Revtex

R2 v1 2026-07-22T14:41:28.841Z