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Study of B c D π in the perturbative QCD approach

  • Jian-Feng ChengEmail author
  • Dong-Sheng Du
  • Cai-Dian Lü
Theoretical Physics

Abstract.

We investigate the branching ratios and direct CP-asymmetries of the \(B_c^ + \to D^0\pi^ + \) and \(B_c^ + \to D^ + \pi^0\) decays in the PQCD approach. All the diagrams with emission topology or annihilation topology are calculated strictly. A branching ratio of 10-6 and 10-7 for \(B_c^ + \to D^0\pi^ + \) and \(B_c^ + \to D^ + \pi^0\) decay is predicted, respectively. Because of the different weak phase and strong phase from penguin operator and two kinds of tree operator contributions, we predict a possible large direct CP-violation: \(A^{\mathrm{dir}}_{CP} (B_c^\pm \to D^0 \pi^\pm )\approx -50\%\) and \(A^{\mathrm{dir}}_{CP} (B_c^\pm \to D^\pm \pi^0 )\approx 25\%\) when γ = 55°, which can be tested in the coming LHC.

Keywords

Field Theory Elementary Particle Quantum Field Theory Tree Operator Strong Phase 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag 2005

Authors and Affiliations

  • Jian-Feng Cheng
    • 1
    Email author
  • Dong-Sheng Du
    • 2
    • 3
  • Cai-Dian Lü
    • 2
    • 3
  1. 1.Institute of High Energy PhysicsCASBeijingChina
  2. 2.CCAST (World Laboratory)BeijingChina
  3. 3.Institute of High Energy PhysicsCASBeijingChina

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