Stewart, Iain W. (1998) Extraction of the D*Dπ coupling from D* decays. Nuclear Physics B, 529 (1-2). pp. 62-80. ISSN 0550-3213. doi:10.1016/S0550-3213(98)00374-5. https://resolver.caltech.edu/CaltechAUTHORS:20170816-133456679
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Abstract
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, and the counterterms at order m_q. A fit to the experimental data gives two possible solutions, g = 0.27_(−0.02−0.02)^(+0.04+0.05), β= 0.85_(−0.1 − 0.1)^(+0.2 + 0.3) GeV− or g = 0.76_(−0.03 −0.1)^(+0.03+0.2), β = 4.90_(−0.3−0.7)^(+0.3+5.0) GeV^(−1). The first errors are experimental, while the second are estimates of the uncertainty induced by the counterterms. (The experimental limit Γ_D* < 0.13 MeV excludes the g = 0.76 solution.) Predictions for the D* and B* widths are given.
Item Type: | Article | |||||||||
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Additional Information: | © 1998 Elsevier B.V. Received 7 April 1998, Accepted 6 May 1998, Available online 4 December 1998. | |||||||||
Issue or Number: | 1-2 | |||||||||
Classification Code: | PACS: 11.30.Rd; 12.39.Hg; 13.25.Ft; 13.40.Hq | |||||||||
DOI: | 10.1016/S0550-3213(98)00374-5 | |||||||||
Record Number: | CaltechAUTHORS:20170816-133456679 | |||||||||
Persistent URL: | https://resolver.caltech.edu/CaltechAUTHORS:20170816-133456679 | |||||||||
Official Citation: | Iain W Stewart, Extraction of the D*Dπ coupling from D* decays, Nuclear Physics B, Volume 529, Issues 1–2, 28 September 1998, Pages 62-80, ISSN 0550-3213, https://doi.org/10.1016/S0550-3213(98)00374-5. (http://www.sciencedirect.com/science/article/pii/S0550321398003745) | |||||||||
Usage Policy: | No commercial reproduction, distribution, display or performance rights in this work are provided. | |||||||||
ID Code: | 80491 | |||||||||
Collection: | CaltechAUTHORS | |||||||||
Deposited By: | Tony Diaz | |||||||||
Deposited On: | 16 Aug 2017 21:16 | |||||||||
Last Modified: | 15 Nov 2021 19:36 |
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