Intrinsic light and strange quark--antiquark pairs in the proton and nonperturbative strangeness suppression

Abstract

The CLAS Collaboration recently reported measured ratios of pion and kaon electroproduction cross sections from a proton target and extracted the ratios for light and strange quark--antiquark pairs, $u\bar{u}/d\bar{d}$ and $s\bar{s}/d\bar{d}$. Within an extended chiral constituent quark formalism, we investigate contributions to those ratios from the nonperturbative mechanism due to all possible intrinsic $|uudQ\bar{Q}⟩$ Fock states in the proton; with $Q\bar{Q}\equiv u\bar{u},d\bar{d},s\bar{s},c\bar{c}$. Our results are compared with the CLAS data and findings from other phenomenological approaches, offering insights into the manifestations of the genuine five--quark Fock states in the proton and its relevance to interpreting the experimental data.

To appear in Phys. Rev. D

References in corpus (9)

• Multiplicities of charged pions and kaons from semi-inclusive deep-inelastic scattering by the proton and the deuteron
• A Critical Appraisal and Evaluation of Modern PDFs
• Measurement of Parton Distributions of Strange Quarks in the Nucleon from Charged-Kaon Production in Deep-Inelastic Scattering on the Deuteron
• Determination of Strange Sea Quark Distributions from Fixed-target and Collider Data
• Flavor Asymmetry of the Nucleon Sea and the Five-Quark Components of the Nucleons
• Flavor Structure of the Nucleon Sea
• Intrinsic charm content of the nucleon and charmness-nucleon sigma term
• Parton Distribution Function from the Hadronic Tensor on the Lattice
• Strangeness Suppression in q-qbar Creation Observed in Exclusive Reactions

Cited by in corpus (6)

• Parton distribution functions and constraints on the intrinsic charm content of the proton using BHPS approach
• Orbital angular momentum of the proton and intrinsic five-quark Fock states
• Investigations on the flavor-dependent axial charges of the octet baryons
• Study of the $s-\bar{s}$ asymmetry in the proton
• Parton distribution functions and QCD coupling constant from LHC and non-LHC data
• Improved determination of strange distribution function from the global analysis using BHPS model