Search for Dirac magnetic monopoles in e+e- collisions with the OPAL detector at LEP2

This Letter describes a direct search for pair produced magnetic monopoles in e+e− collisions. The analysis is based on 62.7 pb −1 of data collected with the OPAL detector at an average centre-of-mass energy of s=206.3 GeV . The monopole signal was assumed to be characterized by two back-to-back particles with an anomalously high ionization energy loss dE/dx in the tracking chambers. No evidence for production of monopoles was observed. Upper limits were obtained on the magnetic monopole pair-production cross-section ( σ ) in the mass range 45 GeV/c2

Note:

13 pages, 3 figures, Submitted to Phys. Letts. B

electron positron: colliding beams
electron positron: annihilation
magnetic monopole: electroproduction
magnetic monopole: Dirac
magnetic monopole: pair production
ionization: energy loss
magnetic monopole: mass
channel cross section: mass
upper limit
OPAL

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