Searching for a U-boson with a positron beam

TL;DR

This paper proposes a high-sensitivity experimental method using a positron beam on hydrogen to search for a light U-boson, aiming to set new upper limits on its coupling constant with improved signal-to-noise ratio.

Contribution

It introduces a novel experimental concept and two realizations for detecting the U-boson with enhanced sensitivity and specific projected limits.

Findings

Projected upper limit on coupling constant: |f_{eU}|^2 = 3 x 10^{-9}

Achieves a signal-to-noise ratio of five

Proposes two experimental realizations for the search

Abstract

A high sensitivity search for a light \Ub{} by means of a positron beam incident on a hydrogen target is proposed. We described a concept of the experiment and two possible realizations. The projected result of this experiment corresponds to an upper limit on the square of coupling constant $ |f_{_{eU}}|^2 = 3 \times 10^{-9}$ with a signal to noise ratio of five.