a b s t r a c tThe data collected by the L3+C muon spectrometer at the CERN Large Electron-Positron collider, LEP, have been used to search for short duration signals emitted by cosmic point sources. A sky survey performed from July to November 1999 and from April to November 2000 has revealed one single flux enhancement ðchance probability ¼ 2:6 Â 10 À3 Þ between the 17th and 20th of August 2000 from a direction with a galactic longitude of (265.02 ± 0.42)°and latitude of (55.58 ± 0.24)°. The energy of the detected muons was above 15 GeV.
The L3+C muon detector at the CERN electron-positron collider, LEP, is used for the detection of very-high-energy cosmic γ-ray sources through the observation of muons of energies above 20, 30,
An effort to search for Kolar-like events within the data set of the L3+C experiment is reported. From a total of 0.89 × 1010 triggered events there are no reliable two-prong Kolar-like events observed. The corresponding event flux upper limit 7.1 × 10−13 cm−2 · s−1 · sr−1 at 90% confidence level is deduced based on some reasonable assumptions.
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