Searching for a new force at VEPP-3

TL;DR

This paper proposes an experiment at VEPP-3 to search for a new gauge boson, A', using missing mass spectra in electron-positron annihilation, aiming to detect signals regardless of decay modes.

Contribution

It introduces a novel experimental approach to detect a new gauge boson via missing mass spectra in e+e- collisions at VEPP-3.

Findings

Projected upper limit on coupling constant |f_{eA'}|^2 = 1×10^{-8} at 15 MeV mass.

Method allows detection independent of A' decay modes.

Expected signal-to-noise ratio of five to one.

Abstract

We propose an experiment to search for a new gauge boson, A$^\prime$, in $e^+e^-$ annihilation by means of a positron beam incident on a gas hydrogen target internal to the VEPP-3 storage ring. The search method is based on a missing mass spectra in the reaction $e^+e^-\rightarrow \gamma$ A$^\prime$. It allows observation of the A$^\prime$ signal independently of its decay modes and life time. The projected result of this experiment corresponds to an upper limit on the square of coupling constant $|f_{e\text{A}{^\prime}}|^2=1\cdot 10^{-8}$ with a signal-to-noise ratio of five to one at an A$^\prime$ mass of 15 MeV.