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Bibliographic Details
Main Authors: Pustyntsev, Aleksandr, Ramasamy, Muthubharathi S., Vanderhaeghen, Marc
Format: Preprint
Published: 2025
Subjects:
Online Access:https://arxiv.org/abs/2511.22568
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Table of Contents:
  • We examine the sensitivity of the beam normal spin asymmetry in Bhabha scattering to beyond the Standard Model (BSM) 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.