Search for charged Higgs bosons decaying via H ± → τν in \( t\overline t \) events using pp collision data at \( \sqrt {s} = 7\;TeV \) with the ATLAS detector

Abstract

The results of a search for charged Higgs bosons are presented. The analysis is based on 4.6fb−1 of proton-proton collision data at \( \sqrt {s} = 7\;TeV \) collected by the ATLAS experiment at the Large Hadron Collider, using top quark pair events with a τ lepton in the final state. The data are consistent with the expected background from Standard Model processes. Assuming that the branching ratio of the charged Higgs boson to a τ lepton and a neutrino is 100 %, this leads to upper limits on the branching ratio of top quark decays to abquarkandachargedHiggsbosonbetween5%and1%forchargedHiggsbosonmasses ranging from 90 GeV to 160 GeV, respectively. In the context of the \( m_h^{\max } \) scenario of the MSSM, tan β above 12-26, as well as between 1 and 2-6, can be excluded for charged Higgs boson masses between 90 GeV and 150 GeV.

References

  1. [1]

    T. Lee, A theory of spontaneous T violation, Phys. Rev. D 8 (1973) 1226 [INSPIRE].

    ADS  Google Scholar 

  2. [2]

    T. Cheng and L.-F. Li, Neutrino masses, mixings and oscillations in SU(2) × U(1) models of electroweak interactions, Phys. Rev. D 22 (1980) 2860 [INSPIRE].

    ADS  Google Scholar 

  3. [3]

    J. Schechter and J. Valle, Neutrino masses in SU(2) × U(1) theories, Phys. Rev. D 22 (1980) 2227 [INSPIRE].

    ADS  Google Scholar 

  4. [4]

    G. Lazarides, Q. Shafi and C. Wetterich, Proton lifetime and fermion masses in an SO(10) model, Nucl. Phys. B 181 (1981) 287 [INSPIRE].

    ADS  Article  Google Scholar 

  5. [5]

    R.N. Mohapatra and G. Senjanovic, Neutrino masses and mixings in gauge models with spontaneous parity violation, Phys. Rev. D 23 (1981) 165 [INSPIRE].

    ADS  Google Scholar 

  6. [6]

    M. Magg and C. Wetterich, Neutrino mass problem and gauge hierarchy, Phys. Lett. B 94 (1980) 61 [INSPIRE].

    ADS  Article  Google Scholar 

  7. [7]

    P. Fayet, Supersymmetry and weak, electromagnetic and strong interactions, Phys. Lett. B 64 (1976) 159 [INSPIRE].

    ADS  Article  Google Scholar 

  8. [8]

    P. Fayet, Spontaneously broken supersymmetric theories of weak, electromagnetic and strong interactions, Phys. Lett. B 69 (1977) 489 [INSPIRE].

    ADS  Article  Google Scholar 

  9. [9]

    G.R. Farrar and P. Fayet, Phenomenology of the production, decay and detection of new hadronic states associated with supersymmetry, Phys. Lett. B 76 (1978) 575 [INSPIRE].

    ADS  Article  Google Scholar 

  10. [10]

    P. Fayet, Relations between the masses of the superpartners of leptons and quarks, the goldstino couplings and the neutral currents, Phys. Lett. B 84 (1979) 416 [INSPIRE].

    ADS  Article  Google Scholar 

  11. [11]

    S. Dimopoulos and H. Georgi, Softly broken supersymmetry and SU(5), Nucl. Phys. B 193 (1981) 150 [INSPIRE].

    ADS  Article  Google Scholar 

  12. [12]

    LHC Higgs Cross Section Working Group collaboration, S. Dittmaier et al., Handbook of LHC Higgs cross sections: 1. Inclusive observables, CERN-2011-002, CERN, Geneva Switzerland (2011) [arXiv:1101.0593] [INSPIRE].

  13. [13]

    LEP Higgs Working Group for Higgs boson searches, ALEPH, DELPHI, L3 and OPAL collaborations, Search for charged Higgs bosons: preliminary combined results using LEP data collected at energies up to 209 GeV, hep-ex/0107031 [INSPIRE].

  14. [14]

    CDF collaboration, T. Aaltonen et al., Search for charged Higgs bosons in decays of top quarks in \( p\overline p \) collisions at \( \sqrt {s} = 1.96\;TeV \), Phys. Rev. Lett. 103 (2009) 101803 [arXiv:0907.1269] [INSPIRE].

    ADS  Article  Google Scholar 

  15. [15]

    D0 collaboration, V. Abazov et al., Search for charged Higgs bosons in top quark decays, Phys. Lett. B 682 (2009) 278 [arXiv:0908.1811] [INSPIRE].

    ADS  Article  Google Scholar 

  16. [16]

    M.S. Carena, S. Heinemeyer, C. Wagner and G. Weiglein, Suggestions for benchmark scenarios for MSSM Higgs boson searches at hadron colliders, Eur. Phys. J. C 26 (2003) 601 [hep-ph/0202167] [INSPIRE].

    ADS  Article  Google Scholar 

  17. [17]

    ATLAS collaboration, G. Aad et al., The ATLAS experiment at the CERN Large Hadron Collider, 2008 JINST 3 S08003 [INSPIRE].

  18. [18]

    ATLAS collaboration, Luminosity determination in pp collisions at \( \sqrt {s} = 7\;TeV \) using the ATLAS detector in 2011, ATLAS-CONF-2011-116, CERN, Geneva Switzerland (2011).

  19. [19]

    ATLAS collaboration, G. Aad et al., Luminosity determination in pp ollisions at \( \sqrt {s} = 7\;TeV \) using the ATLAS detector at the LHC, Eur. Phys. J. C 71(2011) 1630 [arXiv:1101.2185] [INSPIRE].

    ADS  Article  Google Scholar 

  20. [20]

    S. Frixione and B.R. Webber, Matching NLO QCD computations and parton shower simulations, JHEP 06 (2002) 029 [hep-ph/0204244] [INSPIRE].

    ADS  Article  Google Scholar 

  21. [21]

    B.P. Kersevan and E. Richter-Was, The Monte Carlo event generator AcerMC version 2.0 with interfaces to PYTHIA 6.2 and HERWIG 6.5, hep-ph/0405247 [INSPIRE].

  22. [22]

    H.-L. Lai et al., New parton distributions for collider physics, Phys. Rev. D 82 (2010) 074024 [arXiv:1007.2241] [INSPIRE].

    ADS  Google Scholar 

  23. [23]

    G. Corcella et al., HERWIG 6: an event generator for hadron emission reactions with interfering gluons (including supersymmetric processes), JHEP 01 (2001) 010 [hep-ph/0011363] [INSPIRE].

    ADS  Article  Google Scholar 

  24. [24]

    J. Butterworth, J.R. Forshaw and M. Seymour, Multiparton interactions in photoproduction at HERA, Z. Phys. C 72 (1996) 637 [hep-ph/9601371] [INSPIRE].

    ADS  Google Scholar 

  25. [25]

    T. Sjöstrand, S. Mrenna and P.Z. Skands, PYTHIA 6.4 physics and manual, JHEP 05 (2006) 026 [hep-ph/0603175] [INSPIRE].

    ADS  Article  Google Scholar 

  26. [26]

    M. Aliev et al., HATHOR: HAdronic Top and Heavy quarks crOss section calculatoR, Comput. Phys. Commun. 182 (2011) 1034 [arXiv:1007.1327] [INSPIRE].

    ADS  Article  MATH  Google Scholar 

  27. [27]

    N. Kidonakis, Next-to-next-to-leading-order collinear and soft gluon corrections for t-channel single top quark production, Phys. Rev. D 83 (2011) 091503 [arXiv:1103.2792] [INSPIRE].

    ADS  Google Scholar 

  28. [28]

    N. Kidonakis, NNLL resummation for s-channel single top quark production, Phys. Rev. D 81 (2010) 054028 [arXiv:1001.5034] [INSPIRE].

    ADS  Google Scholar 

  29. [29]

    N. Kidonakis, Two-loop soft anomalous dimensions for single top quark associated production with a W or H , Phys. Rev. D 82 (2010) 054018 [arXiv:1005.4451] [INSPIRE].

    ADS  Google Scholar 

  30. [30]

    S. Frixione, E. Laenen, P. Motylinski and B.R. Webber, Single-top production in MC@NLO, JHEP 03 (2006) 092 [hep-ph/0512250] [INSPIRE].

    ADS  Article  Google Scholar 

  31. [31]

    M.L. Mangano, M. Moretti, F. Piccinini, R. Pittau and A.D. Polosa, ALPGEN, a generator for hard multiparton processes in hadronic collisions, JHEP 07 (2003) 001 [hep-ph/0206293] [INSPIRE].

    ADS  Article  Google Scholar 

  32. [32]

    J. Pumplin et al., New generation of parton distributions with uncertainties from global QCD analysis, JHEP 07 (2002) 012 [hep-ph/0201195] [INSPIRE].

    ADS  Article  Google Scholar 

  33. [33]

    R. Gavin, Y. Li, F. Petriello and S. Quackenbush, W physics at the LHC with FEWZ 2.1, arXiv:1201.5896 [INSPIRE].

  34. [34]

    R. Gavin, Y. Li, F. Petriello and S. Quackenbush, FEWZ 2.0: a code for hadronic Z production at next-to-next-to-leading order, Comput. Phys. Commun. 182 (2011) 2388 [arXiv:1011.3540] [INSPIRE].

    ADS  Article  Google Scholar 

  35. [35]

    J.M. Campbell, R.K. Ellis and C. Williams, Vector boson pair production at the LHC, JHEP 07 (2011) 018 [arXiv:1105.0020] [INSPIRE].

    ADS  Article  Google Scholar 

  36. [36]

    Z. Was and P. Golonka, TAUOLA as τ Monte Carlo for future applications, Nucl. Phys. Proc. Suppl. 144 (2005) 88 [hep-ph/0411377] [INSPIRE].

    ADS  Article  Google Scholar 

  37. [37]

    E. Barberio, B. van Eijk and Z. Was, PHOTOS: a universal Monte Carlo for QED radiative corrections in decays, Comput. Phys. Commun. 66 (1991) 115 [INSPIRE].

    ADS  Article  MATH  Google Scholar 

  38. [38]

    ATLAS collaboration, New ATLAS event generator tunes to 2010 data, ATL-PHYS-PUB-2011-008, CERN, Geneva Switzerland (2011).

  39. [39]

    ATLAS collaboration, ATLAS tunes of PYTHIA 6 and PYTHIA 8 for MC11, ATL-PHYS-PUB-2011-009, CERN, Geneva Switzerland (2011).

  40. [40]

    GEANT4 collaboration, S. Agostinelli et al., GEANT4: a simulation toolkit, Nucl. Instrum. Meth. A 506 (2003) 250 [INSPIRE].

    ADS  Article  Google Scholar 

  41. [41]

    ATLAS collaboration, G. Aad et al., The ATLAS simulation infrastructure, Eur. Phys. J. C 70 (2010) 823 [arXiv:1005.4568] [INSPIRE].

    ADS  Article  Google Scholar 

  42. [42]

    ATLAS collaboration, G. Aad et al., Electron performance measurements with the ATLAS detector using the 2010 LHC proton-proton collision data, Eur. Phys. J. C 72 (2012) 1909 [arXiv:1110.3174] [INSPIRE].

    ADS  Article  Google Scholar 

  43. [43]

    ATLAS collaboration, Muon reconstruction efficiency in reprocessed 2010 LHC proton-proton collision data recorded with the ATLAS detector, ATLAS-CONF-2011-063, CERN, Geneva Switzerland (2011).

  44. [44]

    M. Cacciari, G.P. Salam and G. Soyez, The anti-k t jet clustering algorithm, JHEP 04 (2008) 063 [arXiv:0802.1189] [INSPIRE].

    ADS  Article  Google Scholar 

  45. [45]

    M. Cacciari and G.P. Salam, Dispelling the N 3 myth for the k t jet-finder, Phys. Lett. B 641 (2006) 57 [hep-ph/0512210] [INSPIRE].

    ADS  Article  Google Scholar 

  46. [46]

    W. Lampl et al., Calorimeter clustering algorithms: description and performance, ATL-LARG-PUB-2008-002, CERN, Geneva Switzerland (2008) [INSPIRE].

    Google Scholar 

  47. [47]

    ATLAS collaboration, G. Aad et al., Jet energy measurement with the ATLAS detector in proton-proton collisions at \( \sqrt {s} = 7\;TeV \), arXiv:1112.6426 [INSPIRE].

  48. [48]

    ATLAS collaboration, Validating the measurement of jet energies with the ATLAS detector using Z + jet events from proton-proton collisions at \( \sqrt {s} = 7\;TeV \), ATLAS-CONF-2011-159, CERN, Geneva Switzerland (2011).

  49. [49]

    D0 collaboration, V. Abazov et al., Measurement of the \( p\overline p \to t\overline t \) production cross section at \( \sqrt {s} = 1.96\;TeV \) in the fully hadronic decay channel, Phys. Rev. D 76 (2007) 072007 [hep-ex/0612040] [INSPIRE].

    ADS  Google Scholar 

  50. [50]

    ATLAS collaboration, Commissioning of the ATLAS high-performance b-tagging algorithms in the 7 TeV collision data, ATLAS-CONF-2011-102, CERN, Geneva Switzerland (2011).

  51. [51]

    ATLAS collaboration, Performance of the reconstruction and identification of hadronic tau decays with ATLAS, ATLAS-CONF-2011-152, CERN, Geneva Switzerland (2011).

  52. [52]

    ATLAS collaboration, G. Aad et al., Performance of missing transverse momentum reconstruction in proton-proton collisions at 7 TeV with ATLAS, Eur. Phys. J. C 72 (2012) 1844 [arXiv:1108.5602] [INSPIRE].

    ADS  Article  Google Scholar 

  53. [53]

    E. Gross and O. Vitells, Transverse mass observables for charged Higgs boson searches at hadron colliders, Phys. Rev. D 81 (2010) 055010 [arXiv:0907.5367] [INSPIRE].

    ADS  Google Scholar 

  54. [54]

    ATLAS collaboration, G. Aad et al., Search for neutral MSSM Higgs bosons decaying to τ+τ pairs in proton-proton collisions at \( \sqrt {s} = 7\;TeV \) with the ATLAS detector, Phys. Lett. B 705 (2011) 174 [arXiv:1107.5003] [INSPIRE].

    ADS  Article  Google Scholar 

  55. [55]

    ATLAS collaboration, ATLAS muon momentum resolution in the first pass reconstruction of the 2010 pp collision data at \( \sqrt {s} = 7\;TeV \), ATLAS-CONF-2011-046, CERN, Geneva Switzerland (2011).

  56. [56]

    S. Frixione, P. Nason and C. Oleari, Matching NLO QCD computations with parton shower simulations: the POWHEG method, JHEP 11 (2007) 070 [arXiv:0709.2092] [INSPIRE].

    ADS  Article  Google Scholar 

  57. [57]

    P.Z. Skands, Tuning Monte Carlo generators: the Perugia tunes, Phys. Rev. D 82 (2010) 074018 [arXiv:1005.3457] [INSPIRE].

    ADS  Google Scholar 

  58. [58]

    G. Cowan, K. Cranmer, E. Gross and O. Vitells, Asymptotic formulae for likelihood-based tests of new physics, Eur. Phys. J. C 71 (2011) 1554 [arXiv:1007.1727] [INSPIRE].

    ADS  Google Scholar 

  59. [59]

    A.L. Read, Presentation of search results: the CL s technique, J. Phys. G 28 (2002) 2693 [INSPIRE].

    MathSciNet  ADS  Article  Google Scholar 

  60. [60]

    S. Heinemeyer, W. Hollik and G. Weiglein, FeynHiggs: a program for the calculation of the masses of the neutral CP even Higgs bosons in the MSSM, Comput. Phys. Commun. 124 (2000) 76 [hep-ph/9812320] [INSPIRE].

    ADS  Article  MATH  Google Scholar 

  61. [61]

    S. Dittmaier et al., Handbook of LHC Higgs cross sections: 2. Differential distributions, CERN-2012-002, CERN, Geneva Switzerland (2012) [arXiv:1201.3084] [INSPIRE].

  62. [62]

    M.S. Carena, D. Garcia, U. Nierste and C.E. Wagner, Effective Lagrangian for the tbH + interaction in the MSSM and charged Higgs phenomenology, Nucl. Phys. B 577 (2000) 88 [hep-ph/9912516] [INSPIRE].

    ADS  Article  Google Scholar 

Download references

Author information

Affiliations

Authors

Consortia

Additional information

Deceased (E. Arik, A. Bogouch, C. Caso, R. Dobinson, Y. Doi, B. A. Dolgoshein, S. W. O’Neale, J. A. Strong, I. Stumer, M. Virchaux, V. V. Zmouchko)

Rights and permissions

This article is published under an open access license. Please check the 'Copyright Information' section either on this page or in the PDF for details of this license and what re-use is permitted. If your intended use exceeds what is permitted by the license or if you are unable to locate the licence and re-use information, please contact the Rights and Permissions team.

About this article

Cite this article

The ATLAS collaboration., Aad, G., Abbott, B. et al. Search for charged Higgs bosons decaying via H ± → τν in \( t\overline t \) events using pp collision data at \( \sqrt {s} = 7\;TeV \) with the ATLAS detector. J. High Energ. Phys. 2012, 39 (2012). https://doi.org/10.1007/JHEP06(2012)039

Download citation

Keywords

  • Hadron-Hadron Scattering