Strange quark asymmetry in the nucleon and the NuTeV anomaly
| Autor: | Gunnar Ingelman, Johan Alwall |
|---|---|
| Rok vydání: | 2004 |
| Předmět: |
Quark
Physics Nuclear and High Energy Physics Strange quark Particle physics Physics beyond the Standard Model media_common.quotation_subject High Energy Physics::Phenomenology Electroweak interaction Quark model FOS: Physical sciences Weinberg angle interaction [neutrino nucleon] Parton Asymmetry Nuclear physics High Energy Physics - Phenomenology strangeness [quark] High Energy Physics - Phenomenology (hep-ph) interpretation of experiments [numerical calculations] ddc:530 High Energy Physics::Experiment Anomaly (physics) asymmetry [momentum spectrum] media_common |
| Zdroj: | Physical review / D 70(11), 111505 (2004). doi:10.1103/PhysRevD.70.111505 |
| ISSN: | 1550-2368 1550-7998 |
| DOI: | 10.1103/physrevd.70.111505 |
| Popis: | The NuTeV anomaly of a non-universal value of the fundamental parameter sin^2\theta_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 two standard deviations from the Standard Model. Comment: 4 pages, 5 figures, RevTex4. Updated with new references and extended discussion. v.3: Minor corrections made |
| Databáze: | OpenAIRE |
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