Speaker
Aleksandr Pustyntsev
(Johannes Gutenberg University of Mainz)
Description
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.
Authors
Aleksandr Pustyntsev
(Johannes Gutenberg University of Mainz)
Marc Vanderhaeghen
(University Mainz)
Mr
Muthubharathi Ramasamy
(JGU Mainz)
