Probing the Short Range Spin Dependent Interactions by Polarized $^{3}He$ Atom Beams

TL;DR

This paper proposes using polarized $^{3}He$ atom beams to detect short-range spin-dependent forces, achieving significant sensitivity improvements through advanced background reduction and experimental design.

Contribution

It introduces a novel experimental approach with enhanced sensitivity for probing short-range spin-dependent interactions using polarized $^{3}He$ beams.

Findings

Potential sensitivity improvements of up to 10^8 times over current experiments.

Implementation of background reduction techniques like $-metal$ and superconductors.

Feasibility of using high polarization, small beam size $^{3}He$ beams in surface science applications.

Abstract

Experiments using polarized $^{3}He$ atom beams to search for short range spin dependent forces are proposed. High intensity, high polarization, small beam size $^{3}He$ atom beams have been successfully produced and used in surface science researches. By incorporating background reduction designs as combination shielding by $\mu$-metal and superconductor and double beam pathes, the precision of spin rotation angle per unit length could be improved by a factor of $\sim10^{4}$. By this precision, in combination with using a high density and low magnetic susceptibility sample source mass,and reversing one beam path if necessary, sensitivities on three different types of spin dependent interactions could be possibly improved by as much as $\sim10^{2}$ to $\sim10^{8}$ over the current experiments at the millimeter range.