What question did this study set out to answer?

This research aims to search for the existence of magnetic monopoles and measure their flux limits.

March 5, 2026Open Access

Search for Magnetic Monopoles with MACRO

Key Points

This research aims to search for the existence of magnetic monopoles and measure their flux limits.
Utilized data from the complete MACRO Detector for analysis.
Employed scintillator and nuclear track detectors alongside specialized electronics.
Conducted searches for signatures of magnetic monopoles and other rare particles like nuclearites and Q-balls.
No observations of magnetic monopoles were made.
Established strict flux limits for magnetic monopoles at a few 10^{-5}.

Abstract

Data from the complete MACRO Detector have been used to search for magnetic monopoles (MMs) of all expected velocities. Scintillator, stramer tube (instrumented with specialized electronics) and uclear track detectors have been used to search for signatures coming from MMs; the scintillator and nuclear track subdetectors were used also for searches for other rare particles (nuclearites, charged Q-balls). Based on no observation of such signals, we establish stringent flux limits, for MMs as a few 10^-5.

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