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Diffractive dijet production in √s = 7 TeV pp collisions at the ATLAS Experiment

Bansil, Hardeep Singh (2014)
Ph.D. thesis, University of Birmingham.

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Abstract

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.

Type of Work:Ph.D. thesis.
Supervisor(s):Newman, Paul and Bracinik, Juraj
School/Faculty:Colleges (2008 onwards) > College of Engineering & Physical Sciences
Department:Particle Physics Group, School of Physics and Astronomy
Subjects:QC Physics
Institution:University of Birmingham
ID Code:4814
This unpublished thesis/dissertation is copyright of the author and/or third parties. The intellectual property rights of the author or third parties in respect of this work are as defined by The Copyright Designs and Patents Act 1988 or as modified by any successor legislation. Any use made of information contained in this thesis/dissertation must be in accordance with that legislation and must be properly acknowledged. Further distribution or reproduction in any format is prohibited without the permission of the copyright holder.
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