Decay constants of the charmed vector mesons D⁎ and Ds⁎ from QCD sum rules
- 1. HEPHY, Austrian Academy of Sciences, Nikolsdorfergasse 18, A-1050, Vienna (Austria)
- 2. Faculty of Physics, University of Vienna, Boltzmanngasse 5, A-1090 Vienna (Austria)
- 3. D.V. Skobeltsyn Institute of Nuclear Physics, M.V. Lomonosov Moscow State University, 119991, Moscow (Russian Federation)
- 4. INFN, Sezione di Roma III, Via della Vasca Navale 84, I-00146, Roma (Italy)
Description
We present a sum-rule calculation of the decay constants of the charmed vector mesons D⁎ and Ds⁎ from the two-point correlator of vector currents. First, we show that the perturbative expansion in terms of the pole mass exhibits no sign of convergence whereas the reorganization of this expansion in terms of the MS¯ mass leads to a distinct hierarchy. Second, making use of the operator product expansion in terms of the MS¯ mass, we determine the decay constants of the D⁎ and Ds⁎ mesons with an emphasis on the uncertainties in these theoretically predicted quantities related both to the input QCD parameters and to the limited accuracy of the method of sum rules. Our results are fD⁎=(252.2±22.3OPE±4syst) MeV and fDs⁎=(305.5±26.8OPE±5syst) MeV. For the ratios of the vector-to-pseudoscalar decay constants we report fD⁎/fD=1.221±0.080OPE±0.008syst and fDs⁎/fDs=1.241±0.057OPE±0.007syst
Availability note (English)
Available from http://dx.doi.org/10.1016/j.physletb.2014.06.007Additional details
Identifiers
- DOI
- 10.1016/j.physletb.2014.06.007;
- arXiv
- arXiv:1404.0293v2;
- PII
- S0370-2693(14)00402-X;
Publishing Information
- Journal Title
- Physics Letters. Section B
- Journal Volume
- 735
- Journal Issue
- Complete
- Journal Page Range
- p. 12-18
- ISSN
- 0370-2693
- CODEN
- PYLBAJ
INIS
- Country of Publication
- Netherlands
- Country of Input or Organization
- International Atomic Energy Agency (IAEA)
- INIS RN
- 47005894
- Subject category
- S71: CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; S72: PHYSICS OF ELEMENTARY PARTICLES AND FIELDS;
- Descriptors DEI
- ACCURACY; CONVERGENCE; D S MESONS; DECAY; DEUTERIUM IONS; EXPANSION; MASS; MEV RANGE; OPERATOR PRODUCT EXPANSION; QUANTUM CHROMODYNAMICS; SUM RULES; VECTOR CURRENTS; VECTOR MESONS; VECTORS
- Descriptors DEC
- ALGEBRAIC CURRENTS; BOSONS; CHARGED PARTICLES; CHARM PARTICLES; CHARMED MESONS; CURRENTS; ELEMENTARY PARTICLES; ENERGY RANGE; EQUATIONS; FIELD THEORIES; HADRONS; IONS; MESONS; PSEUDOSCALAR MESONS; QUANTUM FIELD THEORY; SERIES EXPANSION; STRANGE MESONS; STRANGE PARTICLES; TENSORS
Optional Information
- Copyright
- Copyright (c) 2014 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.