Flavor Asymmetry of Nucleon Sea from Detailed Balance∗
نویسنده
چکیده
In this talk, we introduce a new work on the flavor asymmetry of the nucleon sea as arising from the pure statistical effect without any parameter. It will be shown that we can reproduce the flavor asymmetry d̄− ū ≈ 0.123, which is in surprisingly agreement with the experimental observation, by just using the principle of detailed balance. We take the proton as an ensemble of a complete set of quark-gluon Fock states, and these different Fock states can be written as
منابع مشابه
Light flavor sea-quark asymmetry for the spin-dependent distribution functions of the nucleon
The theoretical predictions of the chiral quark soliton model for the unpolarized and longitudinally polarized structure functions of the nucleon are compared with recent high energy data. The theory is shown to explain all the qualitatively noticeable features of the existing experiments, including the light flavor sea-quark asymmetry for the unpolarized distribution functions established by t...
متن کاملFlavor Structure of the Nucleon Sea
The recent progress on our understanding of the flavor structure of unpolarized and polarized nucleon sea is reviewed. The large flavor asymmetry between the up and down sea quark distributions is now well established. This asymmetry strongly suggests the importance of the mesonic degrees of freedom in the description of the nucleon sea. The strong connection between the flavor structure and th...
متن کاملFlavor asymmetry of the nucleon sea
One of the most active areas of research in nuclear and particle physics during the last several decades is the study of quark and gluon distributions in the nucleons and nuclei. Several major surprises were discovered in Deep-Inelastic Scattering (DIS) experiments which profoundly changed our views of the partonic substructure of hadrons. In the early 1980’s, the famous ‘EMC’ effect found in m...
متن کاملOff-shell pion structure function and flavor asymmetry in the nucleon sea
We study off-shell effects of the pion cloud on the sea quark distribution in the nucleon. The structure function of the off-mass-shell pion is obtained within the Nambu and Jona-Lasinio model, where the shape of the distribution function depends on the pion momentum. By using the momentum dependent pion structure function, the SU(2) flavor asymmetry in the nucleon see is reexamined within the ...
متن کاملJu l 1 99 7 SLAC - PUB - 7501 BIHEP - TH - 97 - 06 The Spin and Flavor Content of Intrinsic Sea Quarks
The intrinsic quark-antiquark pairs generated by the minimal energy nonperturbative meson-baryon fluctuations in the nucleon sea provide a consistent framework for understanding a number of empirical anomalies observed in the deep inelastic quark-parton structure of nucleons: the flavor asymmetry of the nucleon sea implied by the violation of Gottfried sum rule, the proton spin problem implied ...
متن کامل