Advertisement

Speedy Higgs boson discovery in decays to tau lepton pairs: h → ττ

  • Alan J. Barr
  • Sky T. French
  • James A. Frost
  • Christopher G. Lester
Article

Abstract

Discovery of the Higgs boson in any decay channel depends on the existence of event variables or cuts with sensitivity to the presence of the Higgs. We demonstrate the non-optimality of the kinematic variables which are currently expected to play the largest role in the discovery (or exclusion) of the Higgs at the LHC in the ττ channel. Any LHC collaboration looking for opportunities to gain advantages over its rivals should, perhaps, consider the alternative strategy we propose.

Keywords

Higgs Physics Hadronic Colliders 

Supplementary material

References

  1. [1]
    A.J. Barr, B. Gripaios and C.G. Lester, Measuring the Higgs boson mass in dileptonic W-boson decays at hadron colliders, JHEP 07 (2009) 072 [arXiv:0902.4864] [INSPIRE].ADSCrossRefGoogle Scholar
  2. [2]
    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].ADSGoogle Scholar
  3. [3]
    A. Barr, T. Khoo, P. Konar, K. Kong, C. Lester, et al., Guide to transverse projections and mass-constraining variables, arXiv:1105.2977 [INSPIRE].
  4. [4]
    S. Kuehn, Tau physics in ATLAS, talk given at the 23rd Rencontres de Blois, May 29–June 3, Blois, France (2011).Google Scholar
  5. [5]
    ATLAS collaboration, Search for neutral MSSM Higgs bosons decaying to τ + τ pairs in proton-proton collisions at \( \sqrt {s} = 7 \) TeV with the ATLAS experiment, ATLAS-CONF-2011-024 (2011).
  6. [6]
    CMS collaboration, Search for neutral Higgs boson production and decay to tau pairs, CMS-PAS-HIG-10-002.
  7. [7]
    C. Lester and D. Summers, Measuring masses of semiinvisibly decaying particles pair produced at hadron colliders, Phys. Lett. B 463 (1999) 99 [hep-ph/9906349] [INSPIRE].ADSGoogle Scholar
  8. [8]
    A. Barr, C. Lester and P. Stephens, m(T2): the truth behind the glamour, J. Phys. G G 29 (2003) 2343 [hep-ph/0304226] [INSPIRE].ADSGoogle Scholar
  9. [9]
    H.-C. Cheng and Z. Han, Minimal kinematic constraints and m(T2), JHEP 12 (2008) 063 [arXiv:0810.5178] [INSPIRE].ADSCrossRefGoogle Scholar
  10. [10]
    V.D. Barger, T. Han and J. Ohnemus, Heavy leptons at hadron supercolliders, Phys. Rev. D 37 (1988) 1174 [INSPIRE].ADSGoogle Scholar
  11. [11]
    A.J. Barr, B. Gripaios and C.G. Lester, Re-weighing the evidence for a Higgs boson in dileptonic W-boson decays, arXiv:1108.3468 [INSPIRE].
  12. [12]
    K. Choi, J.S. Lee and C.B. Park, Measuring the Higgs boson mass with transverse mass variables, Phys. Rev. D 82 (2010) 113017 [arXiv:1008.2690] [INSPIRE].ADSGoogle Scholar
  13. [13]
    G. Corcella et al., HERWIG 6.5 release note, hep-ph/0210213 [INSPIRE].
  14. [14]
    G. Marchesini et al., HERWIG: a Monte Carlo event generator for simulating hadron emission reactions with interfering gluons. Version 5.1 — April 1991, Comput. Phys. Commun. 67 (1992) 465 [INSPIRE].ADSCrossRefGoogle Scholar
  15. [15]
    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].ADSGoogle Scholar
  16. [16]
    M. Cacciari, G.P. Salam and G. Soyez, The anti-k t jet clustering algorithm, JHEP 04 (2008) 063 [arXiv:0802.1189] [INSPIRE].ADSCrossRefGoogle Scholar
  17. [17]
    The ATLAS collaboration, G. Aad et al., Expected performance of the ATLAS experiment — Detector, trigger and physics, arXiv:0901.0512 [INSPIRE].
  18. [18]
    CMS collaboration, CMS physics technical design report. Volume II: physics performance, CERN-LHCC-2006-021 (2006).
  19. [19]
    ATLAS collaboration, Observation of Z → τ h τ l decays with the ATLAS detector, ATLAS-CONF-2011-010 (2011).
  20. [20]
    A. Elagin, P. Murat, A. Pranko and A. Safonov, A new mass reconstruction technique for resonances decaying to di-τ, Nucl. Instrum. Meth. A 654 (2011) 481 [arXiv:1012.4686] [INSPIRE].ADSGoogle Scholar

Copyright information

© SISSA, Trieste, Italy 2011

Authors and Affiliations

  • Alan J. Barr
    • 1
  • Sky T. French
    • 2
  • James A. Frost
    • 2
  • Christopher G. Lester
    • 2
  1. 1.Denys Wilkinson BuildingOxfordU.K.
  2. 2.Cavendish Laboratory, Dept of PhysicsCambridgeU.K.

Personalised recommendations