Reflections on the search for particle dark matter by direct experiments

TL;DR

This paper reviews the long-standing quest to detect dark matter particles, focusing on recent experimental efforts, especially those by the DAMA Collaboration, and discusses the implications of their findings.

Contribution

It provides a comprehensive overview of direct detection experiments for dark matter, highlighting recent results and future prospects, with particular emphasis on WIMP searches by DAMA.

Findings

DAMA Collaboration reports potential signals consistent with dark matter.

Recent experiments have placed stringent limits on WIMP interactions.

The paper discusses the challenges and future directions in dark matter detection.

Abstract

Since the daring intuition by Fritz Zwicky in 1933 about the existence of dark matter in the Universe, in spite of the extensive investigations pursued over a very long lapse of time, the nature of this matter and of its (other than gravitational, if any) interactions have remained unknown. Very likely, at least a fraction of this matter consists of fossil particles; a possibility that in the last decades has prompted direct and indirect searches for these relics. Particular attention has been (and is being) devoted to the investigation about the physical effects that fossil particles, and in particular Weakly Interacting Particles (WIMPs), moving in our galaxy can produce when they scatter off the material of an appropriate underground detector. In this note we consider the present status of this type of experimental investigation, and comment about some important results obtained recently by the DAMA Collaboration and their possible developments.