منابع مشابه
A Quark-Meson Model for Heavy Mesons: Semi-Leptonic Decays
I consider a model for heavy meson decays based on an effective quark-meson Lagrangian. The model is constrained by the known symmetries of QCD in the mQ → ∞ limit for the heavy quarks, and chiral symmetry in the light quark sector. Using a limited number of free parameters it is possible to compute several phenomenological quantities, e.g. the leptonic B and B∗∗ decay constants; the Isgur-Wise...
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The full O(a)-improvement of the Wilson action and bilinear quark operators [ 1], was tested in spectroscopy and proved to be efficient, namely the hadronic masses and decay constants indeed converge faster to their continuum limit values. Improved operators, including the O(a)-free renormalization constants (RC’s), have been used to determine the values of the light quark masses. The next impo...
متن کاملSemileptonic decays of heavy mesons
The semileptonic and leptonic decays of heavy mesons are studied as a phenomenological application and exploration of a heavy-quark limit of Dyson-Schwinger equations. The single form factor, ξ(w), which characterises the semileptonic decay in this limit, is calculated and compares well with recent experimental extractions. We obtain a lower bound of 1/3 on the slope-parameter ρ2 ≡ −ξ′(1), whic...
متن کاملSystematic Study on QCD Interactions of Heavy Mesons with ρ Meson
The strong interactions of the negative-parity heavy mesons with ρ meson may be described consistently in the context of an effective lagrangian, which is invariant under isospin SU(2) transformation. Four coupling constants gHHρ, fH∗Hρ, gH∗H∗ρ and fH∗H∗ρ enter the effective lagrangian, where H (H ∗) denotes a pseudoscalar bottom or charm meson (the corresponding vector meson). Using QCD light ...
متن کاملLight Scalar Mesons in Charm Meson Decays
We present recent results on scalar light mesons based on Dalitz plot analyses of charm decays from Fermilab experiment E791. Low mass scalar mesons are found to have large contributions to the decays studied, D → Kππ and D,D s → πππ. These results demonstrate the importance of charm decays as a new environment for the study of light meson physics.
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ژورنال
عنوان ژورنال: Chinese Physics C
سال: 2016
ISSN: 1674-1137
DOI: 10.1088/1674-1137/40/7/073105