Elsevier

Physics Letters B

Volume 790, 10 March 2019, Pages 595-614
Physics Letters B

Study of the hard double-parton scattering contribution to inclusive four-lepton production in pp collisions at s=8 TeV with the ATLAS detector

https://doi.org/10.1016/j.physletb.2019.01.062Get rights and content
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Abstract

The inclusive production of four isolated charged leptons in pp collisions is analysed for the presence of hard double-parton scattering, using 20.2 fb1 of data recorded in the ATLAS detector at the LHC at centre-of-mass energy s=8 TeV. In the four-lepton invariant-mass range of 80<m4<1000 GeV, an artificial neural network is used to enhance the separation between single- and double-parton scattering based on the kinematics of the four leptons in the final state. An upper limit on the fraction of events originating from double-parton scattering is determined at 95% confidence level to be fDPS=0.042, which results in an estimated lower limit on the effective cross section at 95% confidence level of 1.0 mb.

Keywords

Four-lepton production
Double Drell–Yan
Double parton-scattering
Higgs golden decay channel

Cited by (0)

a

Also at Borough of Manhattan Community College, City University of New York, NY, United States of America.

b

Also at California State University, East Bay, United States of America.

c

Also at Centre for High Performance Computing, CSIR Campus, Rosebank, Cape Town, South Africa.

d

Also at CERN, Geneva, Switzerland.

e

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

f

Also at Département de Physique Nucléaire et Corpusculaire, Université de Genève, Genève, Switzerland.

g

Also at Departament de Fisica de la Universitat Autonoma de Barcelona, Barcelona, Spain.

h

Also at Departamento de Física Teorica y del Cosmos, Universidad de Granada, Granada (Spain), Spain.

i

Also at Departamento de Física, Instituto Superior Técnico, Universidade de Lisboa, Lisboa, Portugal.

j

Also at Department of Applied Physics and Astronomy, University of Sharjah, Sharjah, United Arab Emirates.

k

Also at Department of Financial and Management Engineering, University of the Aegean, Chios, Greece.

l

Also at Department of Physics and Astronomy, University of Louisville, Louisville, KY, United States of America.

m

Also at Department of Physics and Astronomy, University of Sheffield, Sheffield, United Kingdom.

n

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

o

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

p

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

q

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

r

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

s

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

t

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

u

Also at Giresun University, Faculty of Engineering, Giresun, Turkey.

v

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

w

Also at Hellenic Open University, Patras, Greece.

x

Also at Horia Hulubei National Institute of Physics and Nuclear Engineering, Bucharest, Romania.

y

Also at II. Physikalisches Institut, Georg-August-Universität Göttingen, Göttingen, Germany.

z

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

aa

Also at Institut für Experimentalphysik, Universität Hamburg, Hamburg, Germany.

ab

Also at Institute for Mathematics, Astrophysics and Particle Physics, Radboud University Nijmegen/Nikhef, Nijmegen, Netherlands.

ac

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

ad

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

ae

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

af

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

ag

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

ah

Also at Instituto de Física Teórica de la Universidad Autónoma de Madrid, Spain.

ai

Also at Istanbul University, Dept. of Physics, Istanbul, Turkey.

aj

Also at Joint Institute for Nuclear Research, Dubna, Russia.

ak

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

al

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

am

Also at LPNHE, Sorbonne Université, Paris Diderot Sorbonne Paris Cité, CNRS/IN2P3, Paris, France.

an

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

ao

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

ap

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

aq

Also at Physikalisches Institut, Albert-Ludwigs-Universität Freiburg, Freiburg, Germany.

ar

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

as

Also at The City College of New York, New York, NY, United States of America.

at

Also at The Collaborative Innovation Center of Quantum Matter (CICQM), Beijing, China.

au

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

av

Also at TRIUMF, Vancouver, BC, Canada.

aw

Also at Universita di Napoli Parthenope, Napoli, Italy.

Deceased.

E-mail address: [email protected].