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Measurement of multi-jet production cross section at a center-of-mass energy of 7 TeV at the large hadron collider with the ATLAS detector

Citation

Lopez Mateos, David (2011) Measurement of multi-jet production cross section at a center-of-mass energy of 7 TeV at the large hadron collider with the ATLAS detector. Dissertation (Ph.D.), California Institute of Technology. http://resolver.caltech.edu/CaltechTHESIS:05162011-094146813

Abstract

Inclusive multi-jet production is studied using proton-proton collisions at a center-of-mass energy of 7 TeV. The data sample corresponds to an integrated luminosity of 2.43 pb^(-1), and uses a subset of the data collected by the ATLAS detector in 2010. Measurements of multi-jet production cross sections with up to six jets are presented and compared to both leading-order predictions enhanced by a parton shower and next-to-leading-order calculations. Generally, agreement is found between data and leading-order and next-to-leading-order predictions. Regions of phase space or observables in which pure parton-shower simulations differ from the measurements are well described by leading-order calculations that combine matrix-element calculations with several outgoing partons in the final state to parton-shower simulations. Measurements compared to next-to-leading-order calculations are shown to be sensitive to the value of the strong coupling constant.

Item Type:Thesis (Dissertation (Ph.D.))
Subject Keywords:Multi-jet; QCD; cross section; LHC; ATLAS; Monte Carlo generators; strong coupling
Degree Grantor:California Institute of Technology
Division:Physics, Mathematics and Astronomy
Major Option:Physics
Thesis Availability:Public (worldwide access)
Research Advisor(s):
  • Hughes, Emlyn Willard
Thesis Committee:
  • Hughes, Emlyn Willard (chair)
  • Newman, Harvey B.
  • Tombrello, Thomas A.
  • Schwarz, John H.
Defense Date:13 May 2011
Record Number:CaltechTHESIS:05162011-094146813
Persistent URL:http://resolver.caltech.edu/CaltechTHESIS:05162011-094146813
Default Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:6394
Collection:CaltechTHESIS
Deposited By: David Lopez Mateos
Deposited On:18 May 2011 16:55
Last Modified:26 Dec 2012 04:35

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