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Journal of High Energy Physics

, 2011:152 | Cite as

Study of \( {\bar{B}^0} \to {D^0}{\mu^{+} }{\mu^{-} } \) decay in perturbative QCD approach

  • C. S. Kim
  • Run-Hui Li
  • Ying Li
Article

Abstract

Within the perturbative QCD approach and ignoring the contributions of long distance and subleading penguin loops, we investigate \( {\bar{B}^0} \to {D^0}{\mu^{+} }{\mu^{-} } \) decay in the large recoiling kinematic region in the Standard Model. At the tree level, \( {\bar{B}^0} \) decays to D 0 by exchanging a W boson accompanied by a virtual photon emission from the valence quarks of \( {\bar{B}^0} \) and D 0 meson, then the virtual photon decays to the lepton pair. Numerically, we find that the branching ratio decreases rapidly as the q 2 increases, and the branching ratio of \( {\bar{B}^0} \to {D^0}{\mu^{+} }{\mu^{-} } \) is \( \left( {9.7_{ - 3.2}^{ + 4.2}} \right) \times {10^{ - 6}} \) in the region q 2 ∈ [1, 5] GeV2. The order of the branching ratio shows a possibility to study this interesting channel in the current B factories and the Large Hadron Collider. The precise experimental data will help us to test the factorization approach and the QCD theory, in general.

Keywords

RareDecays B-Physics CP violation QCD 

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Copyright information

© SISSA, Trieste, Italy 2011

Authors and Affiliations

  1. 1.Department of Physics and IPAPYonsei UniversitySeoulKorea
  2. 2.Department of PhysicsYantai UniversityYantaiChina

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