Strange quark asymmetry in the nucleon and the NuTeV anomaly

Journal Article · Wed Dec 01 04:00:00 EST 2004 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PhysRevD.70.111505· OSTI ID:20698088

Alwall, J ^[1]; Ingelman, G ^[1]; Deutsches Elektronen-Synchrotron DESY, D-22603 Hamburg ^[2]

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1. High Energy Physics, Uppsala University, Box 535, S-75121 Uppsala (Sweden)
2. Germany

The NuTeV anomaly of a nonuniversal value of the fundamental parameter sin{sup 2}{theta}{sub W} in the electroweak theory has been interpreted as an indication for new physics beyond the standard model. However, the observed quantity depends on a possible asymmetry in the momentum distributions of strange quarks and antiquarks in the nucleon. This asymmetry occurs naturally in a phenomenologically successful physical model for such parton distributions, which reduces the NuTeV result to only about 2 standard deviations from the standard model.

• OSTI ID: 20698088
• Journal Information: Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 11 Vol. 70; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ASYMMETRY
DISTRIBUTION
NEUTRAL CURRENTS
NEUTRINO-NUCLEON INTERACTIONS
NUCLEONS
PARTON MODEL
PARTONS
QUARK MODEL
S QUARKS
STANDARD MODEL
WEINBERG-SALAM GAUGE MODEL