Work

Parity violation on longitudinal single-spin asymmetries at the EicC

Year: 2025

Type: article

Abstract: We explore two longitudinal single-spin asymmetries induced from parity violation in neutral-current deep inelastic scattering at the proposed electron-ion collider in China (EicC): A PV e ( p ) from longitudinally polarized (unpolarized) electrons scattering off unpolarized (longitudinally polarized) protons. We find A PV e , of O ( 10 − 4 ) , is generically 1 to 3 orders of magnitude larger than A PV p . We further estimate different uncertainty sources including statistics, parton distribution functions, and beam polarization, for both asymmetries, and then identify individually their dominance in different regimes of the Bjorken- x . Based on these results, we then advocate utilizing A PV p for the extraction of the weak mixing angle at two representative momentum transfer scales unexplored before, and we find a relative precision below 10% can be achieved at the EicC with an effective one-year operation time.

Source: Physical review. D/Physical review. D.

DOI: 10.1103/b8tr-9mcw

Author: Yong Du

Institutions: Shanghai Jiao Tong University, Chinese Academy of Sciences, Institute of Modern Physics, University of Chinese Academy of Sciences

Language: English

Topic: Quantum Chromodynamics and Particle Interactions

Subfield: Nuclear and High Energy Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: hybrid

Funders: National Natural Science Foundation of China, China Postdoctoral Science Foundation, Shanghai Jiao Tong University

Awards: G4030922261, G4241035886