The t-decay lifetime is related to the Kobayashi-Maskawa matrix elements in the free quark model as well as in a semi-phenomenological approach. The semi-leptonic branching ratio is also given.doi:10.1016/0370-2693(85)90561-1Klein, M
Exclusive decay of 1-- quarkonia and B c meson into a lepton pair combined with two pions We study the exclusive decay of , and Bc into a lepton pair combined with two pions in two kinematic regions. One is specified by the two pions ... P J.,MaJ.-S.,Xu - 《European Physical ...
The instanton contribution to the on-shell quark-antiquark annihilation amplitude is investigated by means of the dilute gas approximation in the limit of large quark masses. We find that the instanton correction - evaluated with an instanton scale size cut off 蟻 c - to the decay rate of ...
The observed inclusive decay of B-mesons into eta' + X is interpreted as theconsequence of the gluonic decay of the b-quark into an s-quark. As a result ofthe QCD anomaly this decay proceeds partly as the decay b ---> s + eta',similar to b ---> s + J/psi. The hadronic reco...
The width of the decay eta..--> pi../sup 0/..gamma gamma.. is calculated in the model of dominance of quark loop anomalies. We investigate the contribution of the scalar meson delta(980) for two versions of its quark structure: a) the delta meson is a /sup 2/P/sub 0/ state of...
Non-spectator Diquark Effects on Lifetimes of Ab, Ω(b*) and Weak Decay Rates of ∑b(*),[I](*) The difference of τB and τ∧b indicates the role of the light flavors. We calculate the lifetimes ofB-meson and ∧b based on the weak effective Hamiltoni... VS Dai - 《理论物理通...
We consider the dependence of the pion and kaon decay constants on the up, down and strange quark masses in QCD with strict isospin symmetry. The role of d... XYMFM Guo - 《Nuclear Physics A Journal Devoted to the Experimental Study of the Fundamental Constituents of Matter & Their Action...
Method for measurement of the top quark mass using the mean decay length of b hadrons in t t ¯ events We present a new method for the experimental determination of the top quark mass that is based upon the mean distance of travel of b hadrons in top quark ... CS Hill,JRI Ela,...
The method of systematical expansion in the inverse powers of the heavy quark masses of the weak current matrix elements between heavy meson states is developed in the framework of the relativistic quark model based on the quasipotential approach in quantum field theory. The comparison of the first...
Decays of charmed and bottom mesonsCovariant chiral perturbation theoryLattice QCD calculationsWe study the light quark mass dependence of theDandDsmeson decay constants,fDandfDs, using a covariant formulation of chiral perturbation theory (χPT) at next-to-next-to-leading order (NNLO). Using the ...