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Discovery potential for a charged Higgs boson decaying in the chargino-neutralino channel of the ATLAS detector at the LHC

  • C. Hansen
  • N. Gollub
  • K. Assamagan
  • T. Ekelöf
Scientific Note

Abstract.

Charged Higgs boson production via the gluon-bottom quark mode, gb\(tH^{\pm}\), followed by its decay into a chargino and a neutralino has been investigated. The calculations are based on masses and couplings given by the Minimal Supersymmetric Standard Model (MSSM) for a specific choice of MSSM parameters. The signature of the signal is characterized by three hard leptons, a substantial missing transverse energy due to the decay of the neutralino and the chargino and three hard jets from the hadronic decay of the top quark. The possibility of detecting the signal over the Standard Model (SM) and non-SM backgrounds was studied for a set of \(\tan\beta\) and m A . The existence of 5-\(\sigma\) confidence level regions for \(H^{\pm}\) discovery at integrated luminosities of 100 fb-1 and 300 fb-1 is demonstrated, which cover also the intermediate region 4 \(\lesssim\) \(\tan\beta\) \(\lesssim\) 10 where \(H^{\pm}\) decays to SM particles cannot be used for \(H^{\pm}\) discovery.

Keywords

Higgs Boson Minimal Supersymmetric Standard Model Integrate Luminosity Standard Model Background Branch Ratio 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. 1.
    P.W. Higgs, Broken symmetries, massless particles and gauge fields. Phys. Lett. 12, 132-133 (1964)Google Scholar
  2. 2.
    H.E. Haber, G.L. Kane, The Search for Supersymmetry: Probing Physics Beyond the Standard Model. Phys. Rept. 117, 75 (1985)Google Scholar
  3. 3.
    H.P. Nilles, Supersymmetry, Supergravity and Particle Physics. Phys. Rept. 110, 1 (1984)Google Scholar
  4. 4.
    K.A. Assamagan, Y. Coadou, A. Deandrea, ATLAS discovery potential for a heavy charged Higgs boson. Eur. Phys. J. direct C4, 9 (2002) hep-ph/0203121Google Scholar
  5. 5.
    LEP Higgs Working Group for Higgs boson searches Collaboration, Search for charged Higgs bosons: Preliminary combined results using LEP data collected at energies up to 209- GeV. hep-ex/0107031.Google Scholar
  6. 6.
    Particle Data Group Collaboration, S. Eidelman et al. , Review of particle physics. Phys. Lett. B 592, 1 (2004)Google Scholar
  7. 7.
    S. Abdullin, et al. , Summary of the CMS potential for the Higgs boson discovery. Eur. Phys. J. C 39S2, 41-61 (2005)Google Scholar
  8. 8.
    D. Cavalli et al. , Search for \(H^+ \to \tau \nu_{\tau}\) decays. ATL-PHYS-94-053, 1994Google Scholar
  9. 9.
    D0 Collaboration, V.M. Abazov, et al. , A precision measurement of the mass of the top quark. Nature 429, 638-642 (2004) hep-ex/0406031.Google Scholar
  10. 10.
    K.A. Assamagan, The Charged Higgs in Hadronic Decays With the ATLAS Detector. ATL-PHYS-99-013, 1999Google Scholar
  11. 11.
    K.A. Assamagan, and Y. Coadou, The hadronic \(\tau\) decay of a heavy \(H^{\pm}\) in ATLAS. Acta Phys. Polon. B 33, 707-720 (2002)ADSGoogle Scholar
  12. 12.
    D.J. Miller, S. Moretti, D.P. Roy, W.J. Stirling, Detecting heavy charged Higgs bosons at the LHC with four b quark tags. Phys. Rev. D 61, 055011 (2000) hep-ph/9906230Google Scholar
  13. 13.
    K.A. Assamagan, N. Gollub, The ATLAS discovery potential for a heavy charged Higgs boson in g g \(\to\) t b H+- with H+- \(\to\) t b. hep-ph/0406013Google Scholar
  14. 14.
    M. Bisset, F. Moortgat, S. Moretti, Trilepton + top signal from chargino neutralino decays of MSSM charged Higgs bosons at the LHC. Eur. Phys. J. C 30, 419-434 (2003) hep-ph/0303093Google Scholar
  15. 15.
    M. Bisset, M. Guchait, S. Moretti, Signatures of MSSM charged Higgs bosons via chargino neutralino decay channels at the LHC. Eur. Phys. J. C 19, 143-154 (2001) hep-ph/0010253Google Scholar
  16. 16.
    G. Corcella, et al. , HERWIG 6: An event generator for hadron emission reactions with interfering gluons (including supersymmetric processes). JHEP 01, 010 (2001) hep-ph/0011363Google Scholar
  17. 17.
    S. Moretti, K. Odagiri, P. Richardson, M.H. Seymour, B.R. Webber, Implementation of supersymmetric processes in the HERWIG event generator. JHEP 04, 028 (2002) hep-ph/0204123Google Scholar
  18. 18.
    E. Richter-Was, D. Froidevaux, L. Poggioli, ATLFAST 2.0, a fast simulation package for ATLAS. ATL-PHYS-98-131, 1998Google Scholar
  19. 19.
    E.L. Berger, T. Han, J. Jiang, T. Plehn, Associated production of a top quark and a charged Higgs boson. Phys. Rev. D D71, 115012 (2005) hep-ph/0312286Google Scholar
  20. 20.
    H. Baer, F.E. Paige, S.D. Protopopescu, X. Tata, ISAJET 7.69: A Monte Carlo event generator for pp, \(\bar pp\), and e + e reactions. hep-ph/0312045Google Scholar
  21. 21.
    S. Frixione, P. Nason, B.R. Webber, Matching NLO QCD and parton showers in heavy flavour production. JHEP 08, 007 (2003) hep-ph/0305252Google Scholar
  22. 22.
    R. Hauser, R., The ATLAS trigger system. Eur. Phys. J. C 34, s173-s183. (2004)Google Scholar
  23. 23.
    L. Poggioli, G. Polesello, E. Richter-Was, J. Söderqvist, Precision SUSY measurements with ATLAS for SUGRA point 5. ATL-PHYS-97-111; ATL-GE-PN-111, 1997Google Scholar
  24. 24.
    P. Eerola, et al. , The NorduGrid architecture and tools. ECONF C0303241, MOAT003 (2003) physics/0306002Google Scholar

Copyright information

© Springer-Verlag Berlin/Heidelberg 2005

Authors and Affiliations

  • C. Hansen
    • 1
  • N. Gollub
    • 1
  • K. Assamagan
    • 2
  • T. Ekelöf
    • 1
  1. 1.Uppsala UniversityDepartment of Radiation SciencesUppsalaSweden
  2. 2.Brookhaven National LaboratoryUptonUSA

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