Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2011-06-06
Phys.Rev.C84:015501,2011
Physics
High Energy Physics
High Energy Physics - Phenomenology
23 pages, 8 figures
Scientific paper
10.1103/PhysRevC.84.015501
The neutral current elastic scattering of neutrinos on Carbon and $CH_2$ targets is computed using the relativistic distorted-wave impulse approximation with relativistic optical potential. Results for exclusive and inclusive neutrino reactions on ${}^{12}$C target are presented. We show that the nuclear effects on the shape of four-momentum transferred squared distribution $d\sigma/dQ^2_{QE}$ in neutrino neutral-current and charged-current quasi-elastic scattering are similar. We also calculate flux-averaged neutral current elastic differential cross section $d\sigma/dQ^2_{QE}$ for neutrino scattering from $CH_2$, as well as, the neutral-current to charged-current cross section ratio as functions of $Q^2_{QE}$. The value of axial mass $M_A$ is extracted from a fit of $d\sigma/dQ^2_{QE}$ cross section measured in MiniBooNE experiment. The extracted value of $M_A=1.28\pm 0.05$ GeV is consistent within errors with the MiniBooNE result. Additionally, for proton kinetic energies above the Cherenkov threshold, the strange quark contribution to the neutral current axial vector form factor at $Q^2_{QE}=0$, $\Delta s$, was extracted from a fit of MiniBoone data for $\nu p \to \nu p$ to $\nu N \to \nu N$ cross section ratio. This value is found to be $\Delta s=-0.11\pm 0.36$
Butkevich A. V.
Perevalov Denis
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