Strangeness content of the nucleon in quasielastic neutrino-nucleus reactions

Journal Article · Thu Nov 15 04:00:00 EST 2007 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.76.055501· OSTI ID:21067930

Jachowicz, N; Vancraeyveld, P; Lava, P; Praet, C; Ryckebusch, J ^[1]

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1. Department of Subatomic and Radiation Physics, Ghent University, Proeftuinstraat 86, B-9000 Gent (Belgium)

We present a systematic study of the sensitivity of quasielastic neutrino-nucleus cross sections at intermediate energies to the strange quark sea of the nucleon. To this end, we investigate the impact of the weak strangeness form factors on the ratio of proton-to-neutron knockout, the ratio of neutral-to-charged current cross sections, on the Paschos-Wolfenstein relation, and on the longitudinal helicity asymmetry. The influence of axial as well as vector strangeness effects is discussed. For the latter, we introduce strangeness parameters from various hadron models and from a recent fit to data from parity-violating electron scattering. In our model, the nuclear target is described in terms of a relativistic mean-field approach. The effects of final-state interactions on the outgoing nucleon are quantified within a relativistic multiple-scattering Glauber approach. Our results are illustrated with cross sections for the scattering of 1-GeV neutrinos and antineutrinos off a {sup 12}C target. Folding with a proposed FINeSSE (anti-)neutrino energy distribution has no qualitative influence on the overall sensitivity of the cross-section ratios to strangeness mechanisms. We show that vector strangeness effects are large and strongly Q{sup 2} dependent.

• OSTI ID: 21067930
• Journal Information: Physical Review. C, Nuclear Physics, Journal Name: Physical Review. C, Nuclear Physics Journal Issue: 5 Vol. 76; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ANTINEUTRINO REACTIONS
ANTINEUTRINOS
ASYMMETRY
CARBON 12
CARBON 12 TARGET
CHARGED CURRENTS
CROSS SECTIONS
ELECTRONS
FINAL-STATE INTERACTIONS
FORM FACTORS
GEV RANGE
GLAUBER THEORY
HELICITY
KNOCK-OUT REACTIONS
MEAN-FIELD THEORY
MULTIPLE SCATTERING
NEUTRINO REACTIONS
PARITY
S QUARKS
STRANGENESS