New physics searches via beam normal spin asymmetry in Bhabha scattering
Abstract
We examine the sensitivity of the beam normal spin asymmetry in Bhabha scattering to beyond the Standard Model mediators, in the context of the JLab polarized positron program. A key property of this observable is that the Standard Model contribution exhibits a zero crossing at a fixed scattering angle, providing a clean, effectively background-free point for these searches. We consider scalar, vector, and axial vector mediators and present projected bounds, finding that scalar and vector scenarios allow a significant extension of the search ranges beyond existing constraints.
Fields of Study & Subjects
Particle physics theoretical and experimental studies
Particle Accelerators and Free-Electron Lasers
Quantum Chromodynamics and Particle Interactions
Publication details
- Journal / source
- Physical review. D/Physical review. D.
- Publisher
- American Physical Society (APS)
- Volume
- 113
- Issue
- 7
- Publication date
- 1 April 2026
- Language
- EN