2020 Impact factor 4.590
Particles and Fields
Eur. Phys. J. C 25, 511-522 (2002)
DOI: 10.1140/epjc/s2002-01046-9

Final results of magnetic monopole searches with the MACRO experiment

The MACRO Collaboration

(Received: 15 July 2002 / Published online: 27 September 2002)

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.

© Società Italiana di Fisica, Springer-Verlag 2002