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
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|
|Thesis Availability:||Public (worldwide access)|
|Defense Date:||13 May 2011|
|Default Usage Policy:||No commercial reproduction, distribution, display or performance rights in this work are provided.|
|Deposited By:||David Lopez Mateos|
|Deposited On:||18 May 2011 16:55|
|Last Modified:||26 Dec 2012 04:35|
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