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Title: Diffractive dijet production in √s = 7 TeV pp collisions at the ATLAS Experiment
Author: Bansil, Hardeep Singh
ISNI:       0000 0004 5346 7456
Awarding Body: University of Birmingham
Current Institution: University of Birmingham
Date of Award: 2014
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A data sample of pp collisions with an integrated luminosity of 6.75 nb\(^{-1}\) was collected using a combination of a minimum bias trigger and a single jet trigger at √s = 7 TeV using the ATLAS detector at the Large Hadron Collider. It is analysed to study diffractive dijet production, i.e. events with a hadronic system containing at least two jets in addition to a large region of pseudorapidity devoid of hadronic activity. The cross section is presented differentially with respect to Δη\(^F\), the largest continuous region of pseudorapidity which extends from the edge of the detector at η = ±4.9 and contains no final state particles above threshold momentum cuts, over the region 0 < Δη\(^F\) < 6.5. It is also presented differentially in the variable ξ\(^±\), which estimates the fractional momentum loss of the proton in single diffractive dissociation (pp → pX) events. Comparing the data distributions with a Monte Carlo model suggest that fluctuations in the hadronisation process allow non-diffractive dijets to look like diffractive events, but that the data cannot be described solely by non-diffractive dijet production. In addition, the monitoring of the electromagnetic and jet efficiencies for the ATLAS Level-1 Calorimeter Trigger is described.
Supervisor: Not available Sponsor: Science and Technology Facilities Council (STFC)
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available
Keywords: QC Physics