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The Rare radiative annihilation decays anti-B0(s,d) ---> J / psi gamma

Aug, 2003
13 pages
Published in:
  • Eur.Phys.J.C 34 (2004) 291-296
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Abstract:
We investigate the physics potential of the annihilation decays Bˉs,d0→J/ψ\bar{B}^0_{s,d} \to J/\psi γ\gamma in the Standard Model and beyond. In naive factorization approach, the branching ratios are estimated to be B(Bˉs0→J/ψγ)=1.40×10−6\mathcal{B}(\bar{B}^0_s \to J/\psi\gamma)=1.40\times 10^{-6} and B(Bˉd0→J/ψγ)=5.29×10−8\mathcal{B}(\bar{B}^0_d \to J/\psi\gamma)=5.29\times 10^{-8}. In the framework of QCD factorization, we compute the non-factorizable corrections and get B(Bˉs0→J/ψγ)=2.11×10−7\mathcal{B}(\bar{B}^0_s \to J/\psi\gamma) = 2.11\times10^{-7}, B(Bˉd0→J/ψγ)=7.65×10−9\mathcal{B}(\bar{B}^0_d \to J/\psi\gamma) =7.65\times10^{-9}. Future measurements of these decays would be useful for testing the factorization frameworks. The smallness of these decays in the SM make them sensitive probes of New Physics. As an example, we will consider the possible admixture of (V+A) charge current to the standard (V-A) current. This admixture will give significant contributions to the decays.
Note:
  • 13pages, 3figures
  • talk: Trieste 2003/05/12
  • B: rare decay
  • decay: exclusive reaction
  • anti-B0: radiative decay
  • anti-B/s0: radiative decay
  • J/psi(3100)
  • anti-B0: branching ratio
  • anti-B/s0: branching ratio
  • Feynman graph
  • amplitude analysis
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