We have investigated the spectra of light-heavy quarkonia with the use of a quantum-chromodynamic potential model which is similar to that used earlier for the heavy quarkonia. An essential feature of our treatment is the inclusion of the one-loop radiative corrections to the quark-antiquark potential, which contribute significantly to the spin-splittings among the quarkonium energy levels. Unl...

Assuming the D̄, D, D s and B , B, B s mesons belong to triplets of SU(3) flavor symmetry, we analyse the form factors in the semileptonic decays of these mesons. Both quark and meson mass differences are taken into account. We find a number of relations, in agreement with the present data as well as with previous analyses, and predict certain ratios of form factors, not yet measured, most notab...

The Σc − Σc and Σ∗b − Σb hyperfine mass splittings are computed in the Skyrme model. The hyperfine splittings are suppressed by both 1/Nc and by 1/mQ, where Nc is the number of colors and mQ is the mass of the heavy quark. The Σc, Σ ∗ c , Σb, Σ ∗ b , and Λb masses are predicted in terms of the known values of the Λc, D, D , B and B masses. UCSD/PTH 92-26 hep-ph/9208238 August 1992 1 Baryons con...

Based on the quark mass density-and temperature-dependent model we suggest a model for nuclear matter where the meson field is introduced to be directly coupled to the quarks. The dynamic formation of the nucleon bag, the saturation properties of nuclear matter as well as equation of state for this model are studies. Relativistic calculation of infinite nuclear matter as well as neutron matter ...

Mesons containing one heavy quark are a useful laboratory to test QCD models. In the limit of heavy quark mass mQ → ∞, heavy mesons’ properties are governed by the dynamics of the light quark. As such, these states become “hydrogen atoms” of hadron physics. In this Heavy Quark Symmetry approach (see references 1) the quantum numbers of the heavy and light quarks are separately conserved by the ...

One of the challenges for elementary particle physics is to trace all possible sources of the violation of CP symmetry. In the standard model, CP symmetry is violated through the CKM mechanism. Although the standard model picture of CP violation has so far been confirmed by all laboratory measurements, the level of CP violation in the standard model is too small to produce the observed baryon n...

One of the challenges for elementary particle physics is to trace all possible sources of the violation of CP symmetry. In the standard model, CP symmetry is violated through the CKM mechanism. Although the standard model picture of CP violation has so far been confirmed by all laboratory measurements, the level of CP violation in the standard model is too small to produce the observed baryon n...

The Dyson-Schwinger equation for the quark self energy is solved in rainbow approximation using an infrared (IR) vanishing gluon propagator that introduces an IR mass scale b. There exists a b dependent critical coupling indicating the spontaneous breakdown of chiral symmetry. If one chooses realistic QCD coupling constants the strength and the scale of spontaneous chiral symmetry breaking deco...

The observed inclusive decay of B–mesons into η′ + X is interpreted as the consequence of the gluonic decay of the b–quark into an s–quark. As a result of the QCD anomaly this decay proceeds partly as the decay b → s + η′, similar to b → s + J/ψ. The hadronic recoiling system is found to have a relatively large mass. Analogously one expects a decay of the type b→ s+ σ. The branching ratios for ...

Azimuthal correlation between the (p l , p X b) and (p l , P t) planes in the semileptonic rest frame decay of a polarized top quark: An O(α s) effect Abstract The azimuthal correlation between the planes formed by the vectors (p l , p X b) and (p l , P t) in the semileptonic rest frame decay of a polarized top quark t(↑) → X b + l + + ν l belongs to a class of polarization observables involvin...