Quasielastic neutrino-nucleus scattering

Abstract

We study the sensitivity of neutral-current neutrino-nucleus scattering to the strange-quark content of the axial-vector form factor of the nucleon. A model-independent formalism for this reaction is developed in terms of eight nuclear structure functions. Taking advantage of the insensitivity of the ratio of proton $(\nu ,{\nu }^{\prime }p)$ to neutron $(\nu ,{\nu }^{\prime }n)$ yields to distortion effects, we compute all structure functions in a relativistic plane wave impulse approximation approach. Further, by employing the notion of a bound-state nucleon propagator, closed-form, analytic expressions for all nuclear-structure functions are developed in terms of an accurately calibrated relativistic mean-field model. Using a strange-quark contribution to the axial-vector form factor of $g_A^s=-0.19$, a significant enhancement in the proton-to-neutron yields is observed relative to one with $g_A^s=0$.

23 pages, 12 figures, Revtex, Submitted to Phys. Rev. C

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• Neutrino neutral-current elastic scattering on 12C
• Strange-quark contribution to the ratio of neutral- to charged-current cross sections in neutrino-nucleus scattering
• Ambiguities of neutrino(antineutrino) scattering on the nucleon due to the uncertainties of relevant strangeness form factors
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• Helicity asymmetries in neutrino-nucleus interactions
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• Neutral Current Neutrino-Nucleus Scattering. Theory
• Electromagnetic production of hypernuclei
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• Quasi-Elastic Neutrino Reactions on Carbon and Lead Nuclei
• Signals for strange quark contributions to the neutrino (antineutrino) scattering in quasi-elastic region