Current Location:home > Detailed Browse

Article Detail

Constraints on $s-\bar s$ asymmetry of the proton in chiral effective theory


We compute the?s?s??asymmetry in the proton in chiral effective theory, using phenomenological constraints based upon existing data. Unlike previous meson cloud model calculations, which accounted for kaon loop contributions with on-shell intermediate states alone, this work includes off-shell terms and contact interactions, which impact the shape of the?s?s??difference. Using a regularization procedure that preserves chiral symmetry and Lorentz invariance, we find that existing data limit the integrated value of the first moment of the asymmetry to the range??0.07×10?3≤?x(s?s?)?≤1.12×10?3?at a scale of?Q2=1GeV2. In contrast to some suggestions in the literature, the magnitude of this correction is too small to account for the NuTeV anomaly.
Download Comment Hits:656 Downloads:361
Recommended references: X. G. Wang,Chueng-Ryong Ji W. Melnitchouk,Y. Salamu,A. W. Thomas P. Wang.(2016).Constraints on $s-\bar s$ asymmetry of the proton in chiral effective theory.[ChinaXiv:201608.00211] (Click&Copy)
Version History
[V1] 2016-08-31 08:18:18 chinaXiv:201608.00211V1 Download
Related Paper

7. On dark matter 2021-10-08


Current Browse

Change Subject Browse

Cross Subject Browse

  • - NO