Sigma Meson Cloud and Proton's Light Flavor Sea Quarks

Abstract

We take into account the sigma meson cloud effect in the meson cloud model to calculate the distributions of light flavor sea quarks in the proton. Our calculation gives a better description of the data for $\bar{d}(x)/\bar{u}(x)$. We also provide a picture that the probability of finding a physical proton in a Fock state $|N\omega >$ is reasonable small with a smaller cutoff ${\Lambda }_{\omega }$.

arXiv comment10 latex pages, 4 figures. Version to appear in PLB

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Cited by in corpus (9)

• The electromagnetic form factors of $\Lambda$ hyperon in the vector meson dominance model
• Nucleon sea in the effective chiral quark model
• Pion structure function at small x from DIS data
• Sea quark contents of octet baryons
• Quark sea asymmetries of the octet baryons
• Nucleon structure functions and longitudinal spin asymmetries in the chiral quark constituent model
• Sivers function of sea quarks in the light-cone model
• Quark flavor distribution functions for the octet baryons in the chiral quark constituent model
• Electromagnetic and Axial-Vector Form Factors of the Quarks and Nucleon