In this letter we present the results of the search for massive magnetic monopoles in the penetrating cosmic ray radiation using the various subdetectors of the MACRO apparatus, during the period 1989-1995. Flux limits are given for the β = v/c range 4 × 10-5 < β < 1; for 10-4 < β < 10-1 the limits are below the Parker bound, ∼ 10-15 cm-2s-1sr-1.
|Original language||English (US)|
|Number of pages||7|
|Journal||Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics|
|State||Published - Aug 7 1997|
Bibliographical noteFunding Information:
We gratefully acknowledge the support of the director and of the staff of the Laboratori Nazionali de1 Gran Sass0 and the invaluable assistanceo f the technical staff of the Institutions participating in the experiment. We thank the Istituto Nazionale di Fisica Nucleare (INFN) , the US Departmento f Energy and the US National Science Foundation for their generous support of the MACRO experiment.W e thank INFN for providing fellowships and grants (FAD for non Italian citizens.