What is inside the nucleon?
We briefly review the structure of nucleon in the context of QCD, Constituent Quark Model and Chiral Quark Model.
hep-ph↗
arXiv subjects
Harleen Dahiya
Publications and source records attributed to Harleen Dahiya.
Chiral Quark Model with Configuration Mixing
The implications of one gluon exchange generated configuration mixing in the Chiral Quark Model ($χ$QM$_{gcm}$) with SU(3) and axial U(1) symmetry breakings are discussed in the context of proton flavor and spin structure as well as the hyperon $β$-decay parameters. We find that $χ$QM$_{gcm}$ with SU(3) symmetry breaking is able to give a satisfactory unified fit for spin and quark distribution functions, with the symmetry breaking parameters $α=.4$, $β=.7$ and the mixing angle $ϕ=20^o$, both for NMC and the most recent E866 data. In particular, the agreement with data, in the case of $G_A/G_V, Δ_8$, F, D, $f_s$ and $f_3/f_8$, is quite striking.
hep-ph↗
Reconciling $G_A/G_V, $ and $μ_{p,n}$ in Chiral Quark Model with one Gluon Generated Configuration Mixing
The spin polarization functions $(Δu, ~Δd, ~Δs)$ for proton are calculated in the chiral quark model ($χ$QM) with SU(3) symmetry breaking as well as configuration mixing generated by one gluon exchange forces for the NMC and the most recent E866 data. Besides reproducing the spin polarization functions $Δu,Δd, Δs$ as well as $G_A/G_V$, it can accomodate nucleon magnetic moments and neutron charge radius as well, thus resolving the compatibility problem of these parameters which could not be achieved in constituent quark models.
hep-ph↗
Implications of Configuration Mixing in The Chiral Quark Model With SU(3) and Axial U(1) Breakings for Nucleon Spin-Flavor Structure
The implications of Chiral Quark Model with SU(3) and axial U(1) symmetry breakings as well as configuration mixing generated by one gluon exchange forces ($χ$QM$_{gcm}$) are discussed in context of proton flavor and spin structure as well as hyperon $β$-decay data. Apart from reproducing the success of $χ$QM with symmetry breaking, it is able to improve upon the agreement with data in several cases such as, $G_A/G_V, Δ_8, $ dependent on spin polarization functions and ($\frac{2 \bar s}{u+d}$), ($\frac{2 \bar s}{\bar u+\bar d}$) and f_s involving the quark distribution functions.
hep-ph↗