scholarly journals Magnetic moments ofJP=32+decuplet baryons using effective quark masses in a chiral constituent quark model

2015 ◽  
Vol 92 (3) ◽  
Author(s):  
Aarti Girdhar ◽  
Harleen Dahiya ◽  
Monika Randhawa
Keyword(s):  
Quark Model ◽  
Constituent Quark ◽  
Magnetic Moments ◽  
Constituent Quark Model ◽  
Quark Masses

scholarly journals Baryon magnetic moments: Symmetries and relations

2018 ◽  
Vol 175 ◽  
pp. 06001 ◽  
Author(s):  
Assumpta Parreño ◽  
Martin J. Savage ◽  
Brian C. Tiburzi ◽  
Jonas Wilhelm ◽  
Emmanuel Chang ◽  
...  
Keyword(s):  
Quark Model ◽  
Constituent Quark ◽  
Magnetic Moments ◽  
Constituent Quark Model ◽  
Quark Masses ◽  
Symmetric Point ◽  
Down Quark ◽  
Model Predictions ◽  
Insight Into ◽  
Shed Light

Magnetic moments of the octet baryons are computed using lattice QCD in background magnetic fields, including the first treatment of the magnetically coupled ∑0- ⋀ system. Although the computations are performed for relatively large values of the up and down quark masses, we gain new insight into the symmetries and relations between magnetic moments by working at a three-flavor mass-symmetric point. While the spinflavor symmetry in the large Nc limit of QCD is shared by the naïve constituent quark model, we find instances where quark model predictions are considerably favored over those emerging in the large Nc limit. We suggest further calculations that would shed light on the curious patterns of baryon magnetic moments.

scholarly journals Mass spectra of triply heavy charm-beauty baryons

2019 ◽  
Vol 202 ◽  
pp. 06001
Author(s):  
Zalak Shah ◽  
Ajay Kumar Rai
Keyword(s):  
Excited State ◽  
Quark Model ◽  
Mass Spectra ◽  
Constituent Quark ◽  
Magnetic Moments ◽  
Constituent Quark Model ◽  
Potential Term ◽  
First Order ◽  
Regge Trajectories ◽  
First Order Correction

We extract the mass spectra of triply heavy charm-beauty baryons using Hypercentral constituent quark model. The first order correction is also added to the potential term of Hamiltonian. The radial and orbital excited state masses are also determined. Moreover, the Regge trajectories and magnetic moments are also given for these baryons.

scholarly journals Magnetic Moments of S-Shell Pentaquarks in the Constituent Quark Model

2005 ◽  
Vol 113 (4) ◽  
pp. 801-808 ◽  
Author(s):  
T. Inoue ◽  
V. E. Lyubovitskij ◽  
T. Gutsche ◽  
A. Faessler
Keyword(s):  
Quark Model ◽  
Constituent Quark ◽  
Magnetic Moments ◽  
Constituent Quark Model

scholarly journals Spectroscopic Properties of Light Baryon

2022 ◽  
Vol 258 ◽  
pp. 03004
Author(s):  
Chandni Menapara ◽  
Ajay Kumar Rai
Keyword(s):  
Quark Model ◽  
Constituent Quark ◽  
Spectroscopic Properties ◽  
Constituent Quark Model ◽  
Hadron Spectroscopy ◽  
Quark Masses ◽  
Regge Trajectories ◽  
Light Baryon ◽  
Experimental Approaches ◽  
Linear Nature

Hadron Spectroscopy provides a realm to study the internal quark dynamics within the hadrons through phenomenological, theoretical as well as experimental approaches. In the present article, an attempt has been made to exploit the nucleon N resonances using a non-relativistic hypercentral Constituent Quark Model (hCQM). The properties are studied based on the linear nature of confining part of the potential. The 1S-5S, 1P-3P, 1D-2D and 1F states mostly with four star labelled resonances are explored again with the separation of charge states using different constituent quark masses. Also, Regge trajectories for some obtained states are plotted for examining the linear nature.

Exchange Currents in Baryons

1997 ◽  
Vol 52 (12) ◽  
pp. 877-940 ◽  
Author(s):  
Alfons J Buchmann
Keyword(s):  
Quark Model ◽  
Quadrupole Moment ◽  
Charge Radius ◽  
Constituent Quark ◽  
Magnetic Moments ◽  
Impulse Approximation ◽  
Constituent Quark Model ◽  
Pion Exchange ◽  
Electromagnetic Current ◽  
Gluon Exchange

This paper reviews calculations of the electromagnetic properties of baryons using the constituent quark model. We start with a short discussion of spontaneous chiral symmetry breaking, which is essential in understanding the transition from QCD to the constituent quark model. We then discuss a chiral version of the constituent quark model, which simulates the symmetries and dynamical content of the underlying field theory in terms of gluon, pion and sigma exchange between constituent quarks. We show that the electromagnetic current charge and current operators, usually approximated by one-body operators (impulse approximation), must be supplemented by appropriate two-body terms (exchange currents). The latter represent the gluon and pion exchange degrees of freedom in the electromagnetic current operator. These exchange currents must be included for reasons of completeness and consistency. Most importantly, however, they are needed in order for the electromagnetic current to be conserved. We also study the effect of scalar exchange currents connected with the confinement and sigma exchange potentials. By including these twobody exchange currents we go beyond the single-quark impulse approximation, which has mainly been used up to now. The inclusion of gluon- pion-, and scalar-exchange currents in the quark potential model is the new point of the present work. We show that for some observables, such as the magnetic moments, charge, and magnetic radii of the proton and charged Δ (1232) states, exchange currents contribute at the level of some 10%. The same holds true for the magnetic moments of the entire baryon octet, with the exception of the Ξ- magnetic moment. On the other hand, the neutron charge radius, the quadrupole moments of the Δ, and the N → Δ transition quadrupole moment, are dominated by pion and gluon exchange contributions to the charge density operator. The inclusion of the pion and gluon exchange currents leads to a neutron charge radius of the correct size and sign. Based on the gluon and pion exchange current diagrams, we derive parameter-free relations between the neutron charge radius, the quadrupole moment of the Δ, and the N → Δ transition quadrupole moment. Neglecting configuration mixing, we find that the neutron charge radius and the N → Δ transition quadrupole moment are simply related as QN→Δ = r2n√2. The implications of Siegert's theorem for the calculation of the E2 form factor in the N → Δ transition are studied. Finally, we discuss the axial coupling constant of the nucleon. We show that the inclusion of axial pair exchange currents does not significantly alter the NRQM prediction.

Why the Constituent Quark Model Works for Baryon Magnetic Moments

1999 ◽  
Vol 16 (6) ◽  
pp. 403-405 ◽  
Author(s):  
Xiang-song Chen ◽  
Di Qing ◽  
Fan Wang
Keyword(s):  
Quark Model ◽  
Constituent Quark ◽  
Magnetic Moments ◽  
Constituent Quark Model

scholarly journals Nucleon magnetic moments in an extended chiral constituent quark model

2000 ◽  
Vol 8 (3) ◽  
pp. 385-388 ◽  
Author(s):  
R. F. Wagenbrunn ◽  
M. Radici ◽  
S. Boffi ◽  
P. Demetriou
Keyword(s):  
Quark Model ◽  
Constituent Quark ◽  
Magnetic Moments ◽  
Constituent Quark Model
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