Reducing Hadronic Uncertainty in Low-Energy Neutral-Current Processes

2025/06/03 by Tomalak, Oleksandr · 1 citation
#FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #High Energy Physics - Phenomenology (hep-ph) #Nuclear Experiment (nucl-ex) #Nuclear Theory (nucl-th)

paper · doi:10.48550/arxiv.2506.03255

Abstract

We analyze the dominant hadronic uncertainty in low-energy neutral-current (anti)neutrino scattering, estimated at the 3-4 per mille level. This uncertainty arises from limited knowledge of the charge-isospin correlation function of quark currents. We study the charge-charge and charge-isospin correlators within SU(2) and SU(3) chiral perturbation theory (ChPT). In SU(2) ChPT, the two correlators are identical to all orders in the chiral and electromagnetic expansions. We further perform a one-loop SU(3) ChPT calculation and discuss the relevant counterterms. Our findings reduce the hadronic uncertainty in neutral-current processes such as (anti)neutrino-electron and coherent elastic (anti)neutrino-nucleus scattering to the sub-permille level, \lesssim 1 per mille.

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Cited by

• Parity violation in Møller scattering within low-energy effective field theory

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