Many ATLAS analyses study events with muons in them including those searching
for the Higgs boson and new physics. Cosmics muons, however, can also occasionally
enter the detector and mimic the trajectory of a muon from one of the collisions
produced by CERN’s Large Hadron Collider. By understanding the different ways
ATLAS triggers on, collects, reconstructs, and analyses data from cosmic rays and
collisions, the flux of cosmic muons with transverse momenta above 20 GeV in the
central region of the detector was measured to be 1.34 ± 0.06 (stat.) s^−1 m^−2 . At the
same time the cosmic muon charge ratio has been measured to be 1.3 ± 0.1 (stat.).
This measurement of the cosmic muon flux in ATLAS is the first step in quantifying
the sizes of the cosmic muon backgrounds to various physics analyses that look for
events with muons. / Graduate
| Identifer | oai:union.ndltd.org:uvic.ca/oai:dspace.library.uvic.ca:1828/3544 |
| Date | 01 September 2011 |
| Creators | Hill, Ewan Chin |
| Contributors | Trigger, Isabel, Lefebvre, Michel |
| Source Sets | University of Victoria |
| Language | English, English |
| Detected Language | English |
| Type | Thesis |
| Rights | Available to the World Wide Web |
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