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Title: Dijet production in $$\sqrt{s}$$ = 7 TeV pp collisions with large rapidity gaps at the ATLAS experiment

A 6.8 nb$$^{-1}$$ sample of $pp$ collision data collected under low-luminosity conditions at $$\sqrt{s}$$ = 7 TeV by the ATLAS detector at the Large Hadron Collider is used to study diffractive dijet production. Events containing at least two jets with $$p_T$$ are selected and analysed in terms of variables which discriminate between diffractive and non-diffractive processes. Cross sections are measured differentially in $Δη^F$, the size of the observable forward region of pseudorapidity which is devoid of hadronic activity, and in an estimator, $$\bar{ξ}$$, of the fractional momentum loss of the proton assuming single diffractive dissociation (pp→pX). Model comparisons indicate a dominant non-diffractive contribution up to moderately large $Δη^F$ and small $$\bar{ξ}$$, with a diffractive contribution which is significant at the highest $Δη^F$ and the lowest $$\bar{ξ}$$. The rapidity-gap survival probability is estimated from comparisons of the data in this latter region with predictions based on diffractive parton distribution functions.
Authors:
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  1. et al.
Publication Date:
OSTI Identifier:
1246815
Report Number(s):
BNL--112029-2016-JA
Journal ID: ISSN 0370-2693; KA1101021
DOE Contract Number:
SC00112704
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics Letters. Section B; Journal Volume: 754
Publisher:
Elsevier
Research Org:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Org:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS