Limits on Nonstandard Forces in the Submicrometer Range

TL;DR

This study measures Casimir forces at submicrometer distances to constrain nonstandard forces, setting new limits on Yukawa-type deviations and fundamental scales in extra-dimensional models.

Contribution

It provides the first constraints on Yukawa deviations and fundamental scales from Casimir force measurements in the 0.48--6.5 μm range, improving previous limits.

Findings

Stronger constraints on Yukawa parameter α in 1.0--2.9 μm range.

Lower limits on fundamental scale M_* for six extra dimensions.

Enhanced bounds on nonstandard forces at submicrometer scales.

Abstract

We report the search for a nonstandard force by measuring the Casimir forces in the 0.48--6.5 $\mu$m range. By comparing the data and the theory of the Casimir force, we have obtained constraints for the parameter $\alpha$ of the Yukawa-type deviations from Newtonian gravity. The obtained limits are more stringent than previous limits in the 1.0--2.9 $\mu$m range. Furthermore, we have obtained lower limits for the fundamental scale $M_{*}$ for gauged baryon number in the bulk. In particular, for six extra dimensions, the limits on $M_{*}$ are stringent in the range $6.5\times10^{-6}<\rho<2.5\times10^{-4}$.