Elsevier

Physics Letters B

Volume 712, Issues 4–5, 12 June 2012, Pages 331-350
Physics Letters B

Search for new particles decaying to ZZ using final states with leptons and jets with the ATLAS detector in s=7TeV proton–proton collisions

https://doi.org/10.1016/j.physletb.2012.05.020Get rights and content
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Abstract

A search is presented for a narrow resonance decaying to a pair of Z bosons using data corresponding to 1.02fb1 of integrated luminosity collected by the ATLAS experiment from pp collisions at s=7TeV. Events containing either four charged leptons () or two charged leptons and two jets (jj) are analyzed and found to be consistent with the Standard Model background expectation. Lower limits on a resonance mass are set using the Randall–Sundrum (RS1) graviton model as a benchmark. Using both and jj events, an RS1 graviton with k/m¯pl=0.1 and mass between 325 and 845 GeV is excluded at 95% confidence level. In addition, the events are used to set a model-independent fiducial cross section limit of σfid(ppXZZ)<0.92pb at 95% confidence level for any new sources of ZZ production with mZZ greater than 300 GeV.

Cited by (0)

© CERN for the benefit of the ATLAS Collaboration.

E-mail address: [email protected].

a

Also at Laboratorio de Instrumentacao e Fisica Experimental de Particulas – LIP, Lisboa, Portugal.

b

Also at Faculdade de Ciencias and CFNUL, Universidade de Lisboa, Lisboa, Portugal.

c

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

d

Also at TRIUMF, Vancouver, BC, Canada.

e

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

f

Also at Novosibirsk State University, Novosibirsk, Russia.

g

Also at Fermilab, Batavia, IL, United States.

h

Also at Department of Physics, University of Coimbra, Coimbra, Portugal.

i

Also at Università di Napoli Parthenope, Napoli, Italy.

j

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

k

Also at Department of Physics, Middle East Technical University, Ankara, Turkey.

l

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

m

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

n

Also at Group of Particle Physics, University of Montreal, Montreal, QC, Canada.

o

Also at Department of Physics, University of Cape Town, Cape Town, South Africa.

p

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

q

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

r

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

s

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

t

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

u

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

v

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

w

Also at DSM/IRFU (Institut de Recherches sur les Lois Fondamentales de lʼUnivers), CEA Saclay (Commissariat a lʼEnergie Atomique), Gif-sur-Yvette, France.

x

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

y

Also at Departamento de Fisica, Universidade de Minho, Braga, Portugal.

z

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

aa

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

ab

Also at California Institute of Technology, Pasadena, CA, United States.

ac

Also at Institute of Physics, Jagiellonian University, Krakow, Poland.

ad

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

ae

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

af

Also at Department of Physics, Oxford University, Oxford, United Kingdom.

ag

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

ah

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

ai

Also at Laboratoire de Physique Nucléaire et de Hautes Energies, UPMC and Université Paris-Diderot and CNRS/IN2P3, Paris, France.

Deceased.