Results 1 to 10 of about 21,219,868 (313)
The unquenched quark model [PDF]
EPJ Web of Conferences, 2015 In this contribution, we briefly discuss the results for charmonium and bottomonium spectra with self-energy corrections in the unquenched quark model, due to the coupling to the meson-meson continuum The UQM formalism can be extended to include also the
Santopinto E., Ferretti J.
doaj +8 more sources
Zeitschrift für Physik C Particles and Fields, 1994 We construct an effective Lagrangian for low energy hadronic interactions through an infinite expansion in inverse powers of the low energy cutoff $\Lambda_\chi$ of all possible chiral invariant non-renormalizable interactions between quarks and mesons ...
A. Manohar +19 more
core +10 more sources
Pramana, 2003 In this talk I review studies of hadron properties in bosonized chiral quark models for the quark flavor dynamics. Mesons are constructed from Bethe--Salpeter equations and baryons emerge as chiral solitons.
A Ali +30 more
core +6 more sources
Quark mass density- and temperature- dependent model for bulk strange quark matter [PDF]
Phys.Rev. C65 (2002) 035202, 2002 It is shown that the quark mass density-dependent model can not be used to explain the process of the quark deconfinement phase transition because the quark confinement is permanent in this model. A quark mass density- and temperature-dependent model in which the quark confinement is impermanent has been suggested.
Ru-Keng Su, Yun Zhang
arxiv +4 more sources
Quark Number Susceptibility with Finite Quark Mass in Holographic QCD [PDF]
Prog. Theor. Phys. 126 (2011), 735-751, 2010 We study the effect of a finite quark mass on the quark number susceptibility in the framework of holographic QCD. We work in a bottom-up model with a deformed AdS black hole and D3/D7 model to calculate the quark number susceptibility at finite temperature with/without a finite quark chemical potential. As expected the finite quark mass suppresses the
Kim, Kyung-il +3 more
arxiv +3 more sources
Unquenching the Quark Model [PDF]
Theoretical Nuclear Physics in Italy, 2007 We present the formalism for a new generation of unquenched quark models in which quark-antiquark pair effects are taken into account in an explicit form via a microscopic QCD-inspired quark-antiquark creation mechanism. No truncation in the sum over all
Bijker, R., Santopinto, E.
core +4 more sources
The Quark Spin Distributions of the Nucleon [PDF]
Phys.Lett. B441 (1998) 461-467, 1997 The quark helicity measured in polarized deep inelastic scattering is different from the quark spin in the rest frame of the nucleon. We point out that the quark spin distributions $\Delta q_{RF}(x)$ are connected with the quark helicity distributions $\Delta q(x)$ and the quark transversity distributions $\delta q(x)$ by an approximate relation ...
Aoki +11 more
arxiv +4 more sources
EPJ Web of Conferences, 2012 With the advance of experiment, many high excited states of meson are identified. It is found that many of them are difficult to fit into conventional q$ar{q}$q¯ meson spectra. Various explanations are proposed.
Dong Fangfang +4 more
doaj +3 more sources
Nonperturbative partonic quasidistributions of the pion from chiral quark models
Physics Letters B, 2017 We evaluate nonperturbatively the quark quasidistribution amplitude and the valence quark quasidistribution function of the pion in the framework of chiral quark models, namely the Nambu–Jona-Lasinio model and the Spectral Quark Model.
Wojciech Broniowski +1 more
doaj +4 more sources
New signals for vector-like down-type quark in U(1) of $$E_6$$ E6
European Physical Journal C: Particles and Fields, 2018 We consider the pair production of vector-like down-type quarks in an $$E_6$$ E6 motivated model, where each of the produced down-type vector-like quark decays into an ordinary Standard Model light quark and a singlet scalar.
Kasinath Das +3 more
doaj +3 more sources