Final results of magnetic monopole searches with the MACRO experiment

By M. Ambrosio et al., T. M. Collaboration. 2002

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Abstract. We present the final results obtained by the MACRO experiment in the search for GUT magnetic monopoles in the penetrating cosmic radiation, for the range $4\times 10^{-5}< \beta < 1$. Several searches with all the MACRO sub-detectors (i.e. scintillation counters, limited streamer tubes and nuclear track detectors) were performed, both in stand alone and combined ways. No candidates were detected and a 90% Confidence Level (C.L.) upper limit to the local magnetic monopole flux was set at the level of $1.4\times 10^{-16}$ cm-2 s-1 sr-1. This result is the first experimental limit obtained in direct searches which is well below the Parker bound in the whole $\beta$ range in which GUT magnetic monopoles are expected.

Subfields: Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/314a0e826053ff5706629fc4fe3e9867e01b9868