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Asymmetry of Strange Sea in Nucleons | | Xue-Qian Li
; Xiao-Bing Zhang
; Bo-Qiang Ma
; | | Date: |
15 Nov 2001 | | Journal: | Phys.Rev. D65 (2002) 014003 | | Subject: | hep-ph hep-ex nucl-th | | 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 $delta mequiv Delta m_s-Delta m_{ar s}$ where $Delta m_{s(ar s)}$ 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. | | Source: | arXiv, hep-ph/0111183 | | Services: | Forum | Review | PDF | Favorites | |
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