Elsevier

Physics Letters B

Volume 754, 10 March 2016, Pages 214-234
Physics Letters B

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

https://doi.org/10.1016/j.physletb.2016.01.028Get rights and content
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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 (pppX). 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.

Cited by (0)

a

Also at Department of Physics, King's College London, London, United Kingdom.

b

Also at Institute of Physics, Azerbaijan Academy of Sciences, Baku, Azerbaijan.

c

Also at Novosibirsk State University, Novosibirsk, Russia.

d

Also at TRIUMF, Vancouver, BC, Canada.

e

Also at Department of Physics, California State University, Fresno, CA, United States.

f

Also at Department of Physics, University of Fribourg, Fribourg, Switzerland.

g

Also at Departamento de Fisica e Astronomia, Faculdade de Ciencias, Universidade do Porto, Portugal.

h

Also at Tomsk State University, Tomsk, Russia.

i

Also at CPPM, Aix-Marseille Université and CNRS/IN2P3, Marseille, France.

j

Also at Universita di Napoli Parthenope, Napoli, Italy.

k

Also at Institute of Particle Physics (IPP), Canada.

l

Also at Particle Physics Department, Rutherford Appleton Laboratory, Didcot, United Kingdom.

m

Also at Department of Physics, St. Petersburg State Polytechnical University, St. Petersburg, Russia.

n

Also at Louisiana Tech University, Ruston, LA, United States.

o

Also at Institucio Catalana de Recerca i Estudis Avancats, ICREA, Barcelona, Spain.

p

Also at Department of Physics, The University of Michigan, Ann Arbor, MI, United States.

q

Also at Graduate School of Science, Osaka University, Osaka, Japan.

r

Also at Department of Physics, National Tsing Hua University, Taiwan.

s

Also at Department of Physics, The University of Texas at Austin, Austin, TX, United States.

t

Also at Institute of Theoretical Physics, Ilia State University, Tbilisi, Georgia.

u

Also at CERN, Geneva, Switzerland.

v

Also at Georgian Technical University (GTU), Tbilisi, Georgia.

w

Also at Manhattan College, New York, NY, United States.

x

Also at Hellenic Open University, Patras, Greece.

y

Also at Institute of Physics, Academia Sinica, Taipei, Taiwan.

z

Also at LAL, Université Paris-Sud and CNRS/IN2P3, Orsay, France.

aa

Also at Academia Sinica Grid Computing, Institute of Physics, Academia Sinica, Taipei, Taiwan.

ab

Also at School of Physics, Shandong University, Shandong, China.

ac

Also at Moscow Institute of Physics and Technology State University, Dolgoprudny, Russia.

ad

Also at Section de Physique, Université de Genève, Geneva, Switzerland.

ae

Also at International School for Advanced Studies (SISSA), Trieste, Italy.

af

Also at Department of Physics and Astronomy, University of South Carolina, Columbia, SC, United States.

ag

Also at School of Physics and Engineering, Sun Yat-sen University, Guangzhou, China.

ah

Also at Faculty of Physics, M.V. Lomonosov Moscow State University, Moscow, Russia.

ai

Also at National Research Nuclear University MEPhI, Moscow, Russia.

aj

Also at Department of Physics, Stanford University, Stanford, CA, United States.

ak

Also at Institute for Particle and Nuclear Physics, Wigner Research Centre for Physics, Budapest, Hungary.

al

Also at University of Malaya, Department of Physics, Kuala Lumpur, Malaysia.

Deceased.

E-mail address: [email protected].