Results 1 to 10 of about 215,997 (253)

Quark-Resonance model [PDF]

open access: yesZeitschrift 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

The unquenched quark model [PDF]

open access: yesEPJ 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   +7 more sources

Chiral Quark Model [PDF]

open access: yesPramana, 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

Nonperturbative partonic quasidistributions of the pion from chiral quark models

open access: yesPhysics 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

Quark models for mesons [PDF]

open access: yesEPJ 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

Quark Structure of the X (4500), X (4700) and χc(4P,5P) States

open access: yesFrontiers in Physics, 2021
We study some of the main properties (masses and open-flavor strong decay widths) of 4P and 5P charmonia. While there are two candidates for the χc0(4P,5P) states, the X(4500) and X(4700), the properties of the other members of the χc(4P,5P) multiplets ...
J. Ferretti, E. Santopinto
doaj   +1 more source

Study of Hidden-Charm and Hidden-Bottom Pentaquark Resonances in the Quark Model

open access: yesUniverse, 2023
Inspired by the LHCb observation of hidden-charm pentaquarks, i.e., Pc(4312), Pc(4440), and Pc(4457) in the J/ψp invariant mass spectrum, a calculation of the J/ψp scattering cross-section was performed using the quark-delocalization color screening ...
Xinmei Zhu   +4 more
doaj   +1 more source

The Genuine Resonance of Full-Charm Tetraquarks

open access: yesUniverse, 2021
In this work, the genuine resonance states of full-charm tetraquark systems with quantum numbers JPC=0++,1+−,2++ are searched in a nonrelativistic chiral quark model with the help of the Gaussian Expansion Method.
Xiaoyun Chen
doaj   +1 more source

Investigating Fully Strange Tetraquark System with Positive Parity in a Chiral Quark Model

open access: yesUniverse, 2023
Motivated by the intriguing discovery of X(6900) by the LHCb collaboration, we undertake a comprehensive study of the ss¯ss¯ tetraquark system with positive parity, employing the Gaussian expansion within the chiral quark model method.
Yue Tan   +3 more
doaj   +1 more source

Quark confinement in a constituent quark model [PDF]

open access: yesNuclear Physics A, 1995
40 pages, 14 figures, complete uu-file avaiable on ...
Langfeld, K., Rho, M.
openaire   +6 more sources

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