Journal of High Energy Physics

, 2012:134

A fast track towards the ‘Higgs’ spin and parity

  • John Ellis
  • Dae Sung Hwang
  • Verónica Sanz
  • Tevong You
Open AccessArticle

DOI: 10.1007/JHEP11(2012)134

Cite this article as:
Ellis, J., Hwang, D.S., Sanz, V. et al. J. High Energ. Phys. (2012) 2012: 134. doi:10.1007/JHEP11(2012)134

Abstract

The LHC experiments ATLAS and CMS have discovered a new boson that resembles the long-sought Higgs boson: it cannot have spin one, and has couplings to other particles that increase with their masses, but the spin and parity remain to be determined. We show here that the ‘Higgs’ + gauge boson invariant-mass distribution in ‘Higgs’-strahlung events at the Tevatron or the LHC would be very different under the JP =0+,0 and 2+ hypotheses. Ouranalysisisbasedonsimulationsoftheexperimental event selections and cuts using PYTHIA and Delphes, and incorporates statistical samples of ‘toy’ experiments. The observation of ‘Higgs’-strahlung at the Tevatron and the expected peaking of backgrounds at low invariant masses suggest that this process could provide a fast-track indicator of the ‘Higgs’ spin and parity.

Keywords

Higgs PhysicsBeyond Standard Model
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Copyright information

© SISSA 2012

Authors and Affiliations

  • John Ellis
    • 1
    • 2
  • Dae Sung Hwang
    • 3
  • Verónica Sanz
    • 2
    • 4
  • Tevong You
    • 1
    • 2
  1. 1.Theoretical Particle Physics and Cosmology Group, Physics DepartmentKing’s College LondonLondonU.K
  2. 2.Theory Division, Physics Department, CERNGeneva 23Switzerland
  3. 3.Department of PhysicsSejong UniversitySeoulSouth Korea
  4. 4.Department of Physics and AstronomyYork UniversityTorontoCanada