Axial Charges of Octet Baryons in Two-flavor Lattice QCD

Abstract

We evaluate the strangeness-conserving $NN$, $\Sigma \Sigma$, $\Xi \Xi$, $\Lambda \Sigma$ and the strangeness-changing $\Lambda N$, $\Sigma N$, $\Lambda \Xi$, $\Sigma \Xi$ axial charges in lattice QCD with two flavors of dynamical quarks and extend our previous work on pseudoscalar-meson-octet-baryon coupling constants so as to include $\pi \Xi \Xi$, $K\Lambda \Xi$ and $K\Sigma \Xi$ coupling constants. We find that the axial charges have rather weak quark-mass dependence and the breaking in SU(3)-flavor symmetry is small at each quark-mass point we consider.

6 pages, 6 figures. Added discussions and a figure; version to appear in Physics Letters B

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• Nucleon form factors with 2+1 flavor dynamical domain-wall fermions
• Axial coupling constant of the nucleon for two flavours of dynamical quarks in finite and infinite volume
• First Calculation of Hyperon Axial Couplings from Lattice QCD
• Lattice study of flavor SU(3) breaking in hyperon beta decay
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Cited by in corpus (24)

• The Spin Structure of the Nucleon
• Strangeness Contribution to the Proton Spin from Lattice QCD
• Renormalization functions for Nf=2 and Nf=4 Twisted Mass fermions
• Flavor Structure of the Nucleon Sea
• Axial charges of octet and decuplet baryons
• Octet baryon isovector charges from $N_f=2+1$ lattice QCD
• Axial charges of hyperons and charmed baryons using $N_f=2+1+1$ twisted mass fermions
• Axial form factors of the octet baryons in a covariant quark model
• Isovector axial-vector form factors of octet baryons in QCD
• Contact interaction analysis of octet baryon axialvector and pseudoscalar form factors
• Pseudoscalar-meson--octet-baryon coupling constants in two-flavor lattice QCD
• Meson cloud contributions to baryon axial form factors
• Gravitational form factors of hyperons in light-cone QCD
• Tensor form factors of the octet hyperons in QCD
• Lattice-QCD Determination of the Hyperon Axial Couplings in the Continuum Limit
• Axial transition form factors of octet baryons in the perturbative chiral quark model
• Weak interaction axial form factors of the octet baryons in nuclear medium
• Strange Mass Corrections to Hyperonic Semi-leptonic Decay in Statistical Model
• Investigations on the flavor-dependent axial charges of the octet baryons
• Chiral symmetry and the properties of hadrons in the Generalised Nambu-Jona-Lasinio model
• The $g_{{\Sigma }_Q{\Sigma }_Q\pi }$ Coupling Constant via Light Cone QCD Sum Rules
• Effect of isoscalar and isovector scalar fields on baryon semileptonic decays in nuclear matter
• Isovector Axial Vector Form Factors of Octet-Decuplet Hyperon Transition in QCD
• Hyperon couplings from $N_f=2+1$ lattice QCD