Extraction of the D∗Dπ coupling from D∗ decays

  title={Extraction of the D∗D$\pi$ coupling from D∗ decays},
  author={Iain W. Stewart},
  journal={Nuclear Physics},
The decays D* → Dπ and D* → Dγ are well described by heavy meson chiral perturbation theory. With the recent measurement of B(D*+ → D+γ), the D*^0, D*+ and D*_S branching fractions can be used to extract the D*Dπ and D*Dγ couplings g and β. The D* → Dγ decays receive important corrections at order √m_q and, from the heavy quark magnetic moment, at order 1/m_c. Here all the decay rates are computed to one loop, to first order in m_q and 1/m_c, including the effect of heavy meson mass splittings… Expand
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  • Goity, Roberts
  • Physics, Medicine
  • Physical review. D, Particles and fields
  • 1995
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