Work

Effect of asymmetric strange–antistrange sea to the NuTeV anomaly

Year: 2004

Type: article

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 d ¯ – 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.

Source: Physics Letters B

DOI: 10.1016/j.physletb.2004.12.054

Authors: Yong Ding, Rong-Guang Xu, Bo-Qiang Ma

Institutions: Peking University, China Center of Advanced Science and Technology

Language: English

Topic: Quantum Chromodynamics and Particle Interactions

Subfield: Nuclear and High Energy Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: hybrid

Estimated APC paid:

Funder: National Natural Science Foundation of China