Asymmetry of Strange Sea in Nucleons

Abstract

Based on the finite-temperature field theory, we evaluate the medium effects in nucleon which can induce an asymmetry between quarks and antiquarks of the strange sea. The short-distance effects determined by the weak interaction can give rise to $\delta m\equiv \Delta m_s-\Delta m_{\bar{s}}$ where $\Delta m_{s(\bar{s})}$ is the medium-induced mass of strange quark by a few KeV at most, but the long-distance effects by strong interaction are sizable. Our numerical results show that there exists an obvious mass difference between strange and anti-strange quarks, as large as 10-100 MeV.

15 latex pages, 3 figures, to appear in PRD

References in corpus (4)

• Short-distance tachyonic gluon mass and 1/Q^2 corrections
• New Relations and Constraints on Quark Spin-flavor Contents in Symmetry-breaking Chiral Quark Model
• A Tachyonic Gluon Mass: Between Infrared and Ultraviolet
• Isospin Breaking and $\omega$->$\pi \pi$ Decay

Cited by in corpus (4)

• Anisotropic convection in rotating proto-neutron stars
• Effect due to charge symmetry violation on the Paschos-Wolfenstein relation
• Neutrino transport and hydrodynamic stability of rotating proto-neutron stars
• Strange sea asymmetry in nucleons