Effects of nuclear medium and nonisoscalarity in extracting $sin^2\theta_W$ using Paschos-Wolfenstein relation

TL;DR

This paper investigates how nuclear medium effects and nonisoscalarity influence the extraction of the weak mixing angle sin^2θ_W using the Paschos-Wolfenstein relation, with implications for neutrino scattering experiments.

Contribution

It provides a detailed analysis of nuclear medium corrections and nonisoscalarity effects in sin^2θ_W extraction for iron nuclei, incorporating various nuclear effects and correlations.

Findings

Nuclear medium effects significantly impact sin^2θ_W extraction.

Nonisoscalarity corrections are essential for accurate measurements.

Results are relevant for MINERνA and NuSOnG experiments.

Abstract

We study the nuclear medium effects and nonisoscalarity correction in the extraction of weak mixing angle sin$^2\theta_W$ using Paschos-Wolfenstein (PW) relation. The calculations are performed for the iron nucleus. The results are discussed along with the experimental result inferred by NuTeV collaboration. The nuclear medium effects like Fermi motion, binding, shadowing and antishadowing corrections and pion and rho meson cloud contributions have been taken into account. Calculations have been performed in the local density approximation using a relativistic nuclear spectral function which includes nucleon correlations. These studies may be useful for the ongoing MINER$\nu$A experiment as well as for the proposed NuSOnG experiment.