A Search for Lightly Ionizing Particles with the MACRO Detector
MACRO Collaboration
Abstract
A search for lightly ionizing particles has been performed with the MACRO detector. This search was sensitive to particles with charges between 5e and close to the charge of an electron, with β between approximately 0.25 and 1.0. Unlike previous searches both single track events and tracks buried within high multiplicity muon showers were examined. In a period of approximately one year no candidates were observed. Assuming an isotropic flux, for the single track sample this corresponds to a 90% C.L. upper flux limit Φ≤ 9.2 × 10-15 cm-2 sec-1 sr-1 .
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