Study of the shadow of the moon in very high energy cosmic rays with the Milagrito water Cherenkov detector

Details Study of the shadow of the moon in very high energy cosmic rays with the Milagrito water Cherenkov detector Study of the shadow of the moon in very high energy cosmic rays with the Milagrito water Cherenkov detector

Dec 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001phdt.........4w&link_type=abstract

Thesis (PhD). UNIVERSITY OF CALIFORNIA, RIVERSIDE, Source DAI-B 62/06, p. 2759, Dec 2001, 144 pages.

Physics

1

Scientific paper

Milagrito was the first extensive air shower array sensitive to showers initiated by primary cosmic rays with energy below 1 TeV. The shadow of the moon observed in cosmic rays can be used to search for the presence of antimatter in the cosmic ray flux, as well as to study systematic pointing shifts and measure the angular resolution of EAS arrays. The moon shadow, offset from the nominal position, has been observed at the 10.2σ level with Milagrito. This is used to study and correct a systematic pointing error found in the Milagrito data. The average angular resolution of Milagrito is estimated to be 0.90° +/- 0.11°. An upper limit on the p¯/p ratio in ~3TeV cosmic rays is calculated to be 17%, at the 95% confidence level.

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