Nuclear Transparency in a Relativistic Quark Model

Recovering Relativistic Nuclear Phenomenology from the Quark-Meson Coupling Model

The quark-meson coupling (QMC) model for nuclear matter, which describes nuclear matter as non-overlapping MIT bags bound by the self-consistent exchange of scalar and vector mesons is modified by the introduction of a density dependent bag constant. The density dependence of the bag constant is related to that of the in-medium effective nucleon mass through a scaling ansatz suggested by partia...

0 in a relativistic quark model

∗)l̄l in a relativistic quark model

We study the exclusive rare decay B → K(K∗)l̄l with special emphasis on the cascade decay B → K∗(→ Kπ)l̄l. We derive a four-fold angular decay distribution for this process in terms of helicity amplitudes including lepton mass effects. The four-fold angular decay distribution allows to define a number of physical observables which are amenable to measurement. We calculate the relevant form factor...

Saturation properties of nuclear matter in a relativistic mean field model constrained by quark dynamics

We have built an effective Walecka-type hadronic Lagrangian in which the hadron masses and the density dependence of the coupling constants are deduced from the quark dynamics using a Nambu-Jona-Lasinio model. The parameters of this Nambu-Jona-Lasinio model have been determined using the meson properties in the vacuum but also in the medium through the omega meson mass in nuclei measured by the...

Isgur-wise Function in Relativistic Quark Model

Hadronic matrix elements are expressed in the framework of BS formalism, and in the limit of heavy quark mass mQ → ∞, we find that all form factors in processes of B → D weak transition can be incorporated into a single universal Isgur-Wise (I −W ) function ξ(v · v′), which was first discovered by Isgur and Wise in heavy quark effective theory (HQET). By introducing a phenomenological interacti...