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arXiv · hep-ph/0408292

Effect of Asymmetric Strange-Antistrange Sea to the NuTeV Anomaly

Yong Ding·Rong-Guang Xu·Bo-Qiang Ma
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Abstract

We calculate the strange quark and antiquark distributions of the nucleon by using the effective chiral quark model, and find that the strange-antistrange asymmetry can bring a contribution of about 60--100% to the NuTeV deviation of $\sin^{2}θ_{w}$ from the standard value measured in other electroweak processes. The results are insensitive to different inputs. The light-flavor quark asymmetry of $\bar{d}-\bar{u}$ is also investigated and found to be consistent with the experimental measurements. Therefore the chiral quark model provides a successful picture to understand the NuTeV anomaly, as well as the light-flavor quark asymmetry and the proton spin problem in previous studies.

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Yong Ding, Rong-Guang Xu, Bo-Qiang Ma. 2004-12-29. Effect of Asymmetric Strange-Antistrange Sea to the NuTeV Anomaly. https://doi.org/10.1016/j.physletb.2004.12.054

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