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Dijet production in √s = 7 TeV pp collisions with large rapidity gaps at the ATLAS experiment

CollaborationWith : Ancu, Lucian Stefan / Bell, William / Benhar Noccioli, Eleonora / Bilbao De Mendizabal, Javier / Calace, Noemi / Clark, Allan Geoffrey / Coccaro, Andrea / Delitzsch, Chris Malena / Della Volpe, Domenico / Ferrere, Didier / Gadomski, Szymon / Golling, Tobias / Gonzalez Sevilla, Sergio / Gramling, Johanna Léna / Guescini, Francesco / Iacobucci, Giuseppe / Katre, Akshay / Mermod, Philippe / Miucci, Antonio / Muenstermann, Daniel / Paolozzi, Lorenzo / Picazio, Attilio / Ristic, Branislav / Schramm, Steven / Tykhonov, Andrii / Vallecorsa, Sofia / Wu, Xin
Published in Physics Letters. B. 2016, vol. 754, p. 214-234
Collection Open Access - SCOAP3
Abstract A 6.8 nb −1 sample of pp collision data collected under low-luminosity conditions at s=7TeV by the ATLAS detector at the Large Hadron Collider is used to study diffractive dijet production. Events containing at least two jets with pT>20GeV are selected and analysed in terms of variables which discriminate between diffractive and non-diffractive processes. Cross sections are measured differentially in ΔηF , the size of the observable forward region of pseudorapidity which is devoid of hadronic activity, and in an estimator, 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 ΔηF and small ξ˜ , with a diffractive contribution which is significant at the highest ΔηF and the lowest 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.
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ATLAS COLLABORATION. Dijet production in √s = 7 TeV pp collisions with large rapidity gaps at the ATLAS experiment. In: Physics Letters. B, 2016, vol. 754, p. 214-234. https://archive-ouverte.unige.ch/unige:80158

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Deposited on : 2016-02-01

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