Newtorites in bar detectors of gravitational wave

TL;DR

This paper investigates the detection limits of gravitational bar detectors for hypothetical particles called Newtorites, discussing current constraints, potential improvements, and their relevance to dark matter searches.

Contribution

It provides updated limits on Newtorite detection using the Nautilus bar detector and discusses possible enhancements for future searches.

Findings

Current limits are far from dark matter requirements but are the best on Earth for large masses.

Updated limits for MACRO particles are presented.

Potential improvements could enhance detection sensitivity.

Abstract

The detection of particles with only gravitational interactions (Newtorites) in gravitational bar detectors was studied in 1984 by Bernard, De Rujula and Lautrup. The negative results of dark matter searches suggest to look to exotic possibilities like Newtorites. The limits obtained with the Nautilus bar detector will be presented and the possible improvements will be discussed. Since the gravitational coupling is very weak, the possible limits are very far from what is needed for dark matter, but for large masses are the best limits obtained on the Earth. An update of limits for MACRO particles will be given.