Centers and Institutes
Published February 17, 2012 | Version v1
Journal article Open

Search for anomalous production of prompt like-sign muon pairs and constraints on physics beyond the standard model with the ATLAS detector

Creators

  • 1. Albert-Ludwigs-Universität
  • 2. University of Oklahoma
  • 3. Universitat Autònoma de Barcelona
  • 4. Université de Genève
  • 5. Oxford University
  • 6. Azerbaijan Academy of Sciences
  • 7. Oklahoma State University
  • 8. Michigan State University
  • 9. University of Toronto
  • 10. Tel Aviv University
  • 11. Université Paris-Sud
  • 12. INFN Sezione di Milano
  • 13. Università di Udine
  • 14. AGH-University of Science and Technology
  • 15. Brookhaven National Laboratory
  • 16. Hampton University
  • 17. University of Chicago

Description

An inclusive search for anomalous production of two prompt, isolated muons with the same electric charge is presented. The search is performed in a data sample corresponding to $1.6  fb^{−1}$ of integrated luminosity collected in 2011 at $\sqrt{s}=7  TeV$ with the ATLAS detector at the LHC. Muon pairs are selected by requiring two isolated muons of the same electric charge with $p_T>20  GeV$ and $|𝜂|<2.5$. Minimal requirements are placed on the rest of the event activity. The distribution of the invariant mass of the muon pair $𝑚⁡(𝜇⁢𝜇)$ is found to agree well with the background expectation. Upper limits on the cross section for anomalous production of two muons with the same electric charge are placed as a function of $𝑚⁡(𝜇⁢𝜇)$ within a fiducial region defined by the event selection. The fiducial cross-section limit constrains the like-sign top-quark pair-production cross section to be below 3.7 pb at 95% confidence level. The data are also analyzed to search for a narrow like-sign dimuon resonance as predicted for e.g. doubly charged Higgs bosons ($H^\underline{++}$). Assuming pair production of $H^\underline{++}$ bosons and a branching ratio to muons of 100% (33%), this analysis excludes masses below 355 (244) GeV and 251 (209) GeV for $H^\underline{++}$ bosons coupling to left-handed and right-handed fermions, respectively.

Notes

Due to the large number of authors, only the first 20 and the University of Chicago authors are included on the above author list. Please download the article for the complete list of authors.

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Additional details

Identifiers

DOI
10.1103/PhysRevD.85.032004
Other
oai:uchicago.tind.io:12467

Funding

Agencia Nacional de Promoción Científica y Tecnológica
Yerevan Physics Institute
Australian Research Council
Bundesministerium für Bildung, Wissenschaft und Forschung
Azerbaijan National Academy of Sciences
SSTC
National Council for Scientific and Technological Development
Fundação de Amparo à Pesquisa do Estado de São Paulo
Natural Sciences and Engineering Research Council of Canada
National Research Council Canada
Canada Foundation for Innovation
CERN
Consejo Nacional de Innovación, Ciencia y Tecnología
Chinese Academy of Sciences
Ministry of Science and Technology
National Natural Science Foundation of China
Ministerio de Ciencia, Tecnología e Innovación
Ministry of Education, Youth and Sports
Ministry of Industry and Trade
VSC CR
Danish National Research Foundation
Danish Natural Sciences Research Council
Lundbeck Foundation
ARTEMIS
Institut National de Physique Nucléaire et de Physique des Particules
Commissariat à l'Énergie Atomique et aux Énergies Alternatives
Georgian National Academy of Sciences
Bundesministerium für Forschung, Technologie und Raumfahrt
Deutsche Forschungsgemeinschaft
HGF
MPG
AvH Foundation
GSRT
ISF
MINERVA
GIF
DIP
Benoziyo Center
INFN
MEXT
JSPS
CNRST
FOM
NWO
RCN
MNiSW
Gabinete de Relações Internacionais da Ciência e do Ensino Superior
Fundação para a Ciência e Tecnologia
MERYS (MECTS)
MES of Russia
Rosatom (Russia)
Joint Institute for Nuclear Research
Ministry of Education, Science and Technological Development
MSSR
The Slovenian Research and Innovation Agency
Ministry of Science Technology and Higher Education
DST/NRF
Ministerio de Ciencia, Innovación y Universidades
Stockholm Resilience Centre
Wallenberg Foundation
SER
Swiss National Science Foundation
Cantons of Bern and Geneva
National Science and Technology Council
Turkish Atomic Energy Authority
Science and Technology Facilities Council
Royal Society
Leverhulme Trust
U.S. Department of Energy
National Science Foundation

UChicago Information

Division(s)
Physical Sciences Division
Department(s)
Enrico Fermi Institute