Dijet production in $$\sqrt{s}$$ = 7 TeV pp collisions with large rapidity gaps at the ATLAS experiment
- et al.
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.
- Research Organization:
- Brookhaven National Laboratory (BNL), Upton, NY (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), High Energy Physics (HEP)
- DOE Contract Number:
- SC00112704
- OSTI ID:
- 1246815
- Report Number(s):
- BNL-112029-2016-JA; KA1101021
- Journal Information:
- Physics Letters B, Vol. 754; ISSN 0370-2693
- Publisher:
- Elsevier
- Country of Publication:
- United States
- Language:
- English
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