A New Torsion Balance for the Search of Long-range Interactions Coupling to Baryon and Lepton Numbers

TL;DR

This paper introduces a highly sensitive torsion balance designed to detect long-range forces linked to baryon and lepton numbers, aiming to improve constraints on dark matter interactions and violations of Einstein's equivalence principle.

Contribution

The paper presents a novel torsion balance with ten times greater sensitivity for probing long-range interactions involving baryon and lepton numbers.

Findings

Enhanced sensitivity of the torsion balance by a factor of ten.

Projected improved bounds on dark matter long-range interactions.

Potential to test violations of Einstein's equivalence principle.

Abstract

We have developed a torsion balance with a sensitivity about ten times better than those of previously operating balances for the study of long range forces coupling to baryon and lepton number. We present here the details of the design and expected characteristics of this balance. Operation of this balance for a year will also result in improved bounds on long range interactions of dark matter violating Einstein's equivalence principle.