Non-factorizable contributions to $\bar{B^0_d} \to D_s^{(*)} \bar{D_s^{(*)}}$

J. O. Eeg; S. Fajfer; A. Hiorth; A. Prapotnik

doi:10.1016/j.nuclphysbps.2005.01.029

Non-factorizable contributions to $\bar{B^0_d} \to D_s^{()} \bar{D_s^{()}}$

High Energy Physics - Phenomenology 2009-11-10 v1

Authors: J. O. Eeg , S. Fajfer , A. Hiorth , A. Prapotnik

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Abstract

It is pointed out that decays of the type $B \to D \bar{D}$ have no factorizable contributions, unless at least one of the charmed mesons in the final state is a vector meson. The dominant contributions to the decay amplitudes arise from chiral loop contributions and tree level amplitudes generated by soft gluon emissions forming a gluon condensate. We predict that the branching ratios for the processes $\bar B^0 \to D_s^+ D_s^-$ , $\bar B^0 \to D_s^{+*} D_s^-$ and $\bar B^0 \to D_s^+ D_s^{-*}$ are all of order $(3- 4) \times 10^{-4}$ , while $\bar B^0 \to D_s^{+*} D_s^{-*}$ has a branching ratio 5 to 10 times bigger. We emphasize that the branching ratios are sensitive to $1/m_c$ corrections.

Keywords

non-factorizable contributions B decays chiral loops gluon condensate branching ratios 1/m_c corrections

Cite

@article{arxiv.hep-ph/0408298,
  title  = {Non-factorizable contributions to $\bar{B^0_d} \to D_s^{(*)} \bar{D_s^{(*)}}$},
  author = {J. O. Eeg and S. Fajfer and A. Hiorth and A. Prapotnik},
  journal= {arXiv preprint arXiv:hep-ph/0408298},
  year   = {2009}
}

Comments

4 pages, 4 figures. Based on talk by J.O. Eeg at BEACH 2004, 6th international conference on Hyperons, Charm and Beauty Hadrons, Illionois Institute of Technology, Chicago, june. 27 - july 3, 2004