Physics – Nuclear Physics – Nuclear Theory
Scientific paper
2003-10-17
Phys.Rev.C69:035501,2004
Physics
Nuclear Physics
Nuclear Theory
23 pages, 12 figures, Revtex, Submitted to Phys. Rev. C
Scientific paper
10.1103/PhysRevC.69.035501
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 $(\nu,\nu' p)$ to neutron $(\nu,\nu' n)$ 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 $g_{A}^{s}=0$.
Piekarewicz Jorge
van der Ventel I. S. B.
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