Search for high mass dilepton resonances in pp collisions at s=7 TeV with the ATLAS experiment

doi:10.1016/j.physletb.2011.04.044

Physics Letters B

Volume 700, Issues 3–4, 13 June 2011, Pages 163-180

https://doi.org/10.1016/j.physletb.2011.04.044 Get rights and content

Under a Creative Commons license

open access

Abstract

This Letter presents a search for high mass $e^{+} e^{-}$ or $μ^{+} μ^{-}$ resonances in pp collisions at $\sqrt{s} = 7 TeV$ at the LHC. The data were recorded by the ATLAS experiment during 2010 and correspond to a total integrated luminosity of $\sim 40 {pb}^{- 1}$ . No statistically significant excess above the Standard Model expectation is observed in the search region of dilepton invariant mass above 110 GeV. Upper limits at the 95% confidence level are set on the cross section times branching ratio of $Z^{'}$ resonances decaying to dielectrons and dimuons as a function of the resonance mass. A lower mass limit of 1.048 TeV on the Sequential Standard Model $Z^{'}$ boson is derived, as well as mass limits on $Z^{⁎}$ and $E_{6}$ -motivated $Z^{'}$ models.

Keywords

Grand unified theory

Narrow resonance

New gauge boson

Z^{'}

Dilepton

Mass spectrum

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

^d: Also at TRIUMF, Vancouver, BC, Canada.

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

^f: Also at Faculty of Physics and Applied Computer Science, AGH – University of Science and Technology, Krakow, Poland.

^g: Also at Department of Physics, University of Coimbra, Coimbra, Portugal.

^h: Also at Università di Napoli Parthenope, Napoli, Italy.

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

^j: Also at Louisiana Tech University, Ruston, LA, United States.

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

^l: Also at Institute of Physics, Azerbaijan Academy of Sciences, Baku, Azerbaijan.

^m: Also at Institut für Experimentalphysik, Universität Hamburg, Hamburg, Germany.

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

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

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

^q: Also at High Energy Physics Group, Shandong University, Shandong, China.

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

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

^t: Also at Section de Physique, Université de Genève, Geneva, Switzerland.

^u: Also at Departamento de Fisica, Universidade de Minho, Braga, Portugal.

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

^w: Also at KFKI Research Institute for Particle and Nuclear Physics, Budapest, Hungary.

^x: Also at Institute of Physics, Jagiellonian University, Krakow, Poland.

^y: Also at Department of Physics, Oxford University, Oxford, United Kingdom.

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

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

^ab: Also at Department of Physics, Nanjing University, Jiangsu, China.

^⁎: Deceased.

Physics Letters B

Search for high mass dilepton resonances in pp collisions at s=7 TeV with the ATLAS experiment☆

Abstract

Keywords

Search for high mass dilepton resonances in pp collisions at $\sqrt{s} = 7 TeV$ with the ATLAS experiment☆