QCD string in light-light and heavy-light mesons
نویسندگان
چکیده
منابع مشابه
Light-light and heavy-light mesons in the model of QCD string with quarks at the ends
The variational einbein field method is applied to the model of the QCD string with quarks at the ends for the case of light–light and heavy–light mesons. Special attention is payed to the proper string dynamics. The correct string slope of the Regge trajectories is reproduced for light–light states which comes out from the picture of rotating string. Masses of several low-lying orbitally and r...
متن کاملUniversal Behavior in Excited Heavy - Light and Light - Light Mesons
A common pattern of large orbital and radial excitations in heavy-light and lightlight mesons is demonstrated. Within a general potential model the Regge slopes of the light degrees of freedom for these mesons are shown to be in the ratio of two. The possibility of \tower" degeneracy occurs only with pure scalar con nement.
متن کاملContinuum Qcd and Light Mesons
The ladder-rainbow truncation of the set of Dyson–Schwinger equations is used to study light mesons. The parameters in the effective interaction are constrained by the chiral condensate and fπ; the current quark masses are fitted to mπ and mK . The dressed quark propagators are in qualitative agreement with recent latticeQCD results at low q while having the correct perturbative behavior at lar...
متن کاملExcited Heavy Mesons Decay Formfactors in Light Cone Qcd
The formfactors of B1 → π and D1 → π transitions, where B1(D1) is the 1+ P-wave Q̄γνγ5q meson state, are calculated in the framework of the light cone QCD. Furthermore these formfactors are compared with the pole dominance model prediction using the values of the strong coupling constants gB1B∗π and gD1D∗π, and a good agreement between these two different descriptions is observed. PACS numbers: ...
متن کاملHeavy → Light semileptonic decays of pseudoscalar mesons from lattice QCD
We have computed the form factors for B → π andD → K(π) semileptonic decays on the lattice by using full non-perturbative O(a) improvement, in the quenched approximation. Our results are expressed in terms of few parameters which describe the q2-dependence and normalization of the form factors. After combining our results for B → πlνl decay with the measured branching ratio, we obtain |Vub| = (...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Physical Review D
سال: 2001
ISSN: 0556-2821,1089-4918
DOI: 10.1103/physrevd.64.014037