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The performance of the ATLAS missing transverse momentum high-level trigger in 2015 pp collisions at 13 TeV

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dc.contributor.author Chiu, Justin
dc.date.accessioned 2016-09-09T22:05:08Z
dc.date.available 2016-09-09T22:05:08Z
dc.date.copyright 2016 en_US
dc.date.issued 2016-09-09
dc.identifier.uri http://hdl.handle.net/1828/7535
dc.description.abstract The performance of the ATLAS missing transverse momentum (ETmiss) high-level trigger during 2015 operation is presented. In 2015, the Large Hadron Collider operated at a higher centre-of-mass energy and shorter bunch spacing (sqrt(s) = 13 TeV and 25 ns, respectively) than in previous operation. In future operation, the Large Hadron Collider will operate at even higher instantaneous luminosity (O(10^34 cm^−2 s^−1)) and produce a higher average number of interactions per bunch crossing, <mu>. These operating conditions will pose significant challenges to the ETmiss trigger efficiency and rate. An overview of the new algorithms implemented to address these challenges, and of the existing algorithms is given. An integrated luminosity of 1.4 fb^−1 with <mu> = 14 was collected from pp collisions of the Large Hadron Collider by the ATLAS detector during October and November 2015 and was used to study the efficiency, correlation with offline reconstruction, and rates of the trigger algorithms. The performance was found to be satisfactory. From these studies, recommendations for future operating specifications of the trigger were made. en_US
dc.language English eng
dc.language.iso en en_US
dc.rights Available to the World Wide Web en_US
dc.rights.uri http://creativecommons.org/licenses/by-nc-nd/2.5/ca/ *
dc.subject physics en_US
dc.subject trigger en_US
dc.subject particle physics en_US
dc.subject ATLAS experiment en_US
dc.subject CERN en_US
dc.subject missing transverse momentum en_US
dc.subject MET en_US
dc.subject ATLAS detector en_US
dc.subject LHC en_US
dc.title The performance of the ATLAS missing transverse momentum high-level trigger in 2015 pp collisions at 13 TeV en_US
dc.type Thesis en_US
dc.contributor.supervisor Kowalewski, Robert V.
dc.degree.department Department of Physics and Astronomy en_US
dc.degree.level Master of Science M.Sc. en_US
dc.description.scholarlevel Graduate en_US
dc.description.proquestcode 0798, en_US


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