Lone Higgs at the LHC

Abstract

We address the possible scenario that the Large Hadron Collider (LHC) discovers only a Higgs boson after 10 fb^{-1} of operation, and attempt to identify this Higgs boson as that of the Standard Model (SM), the minimal universal extra dimension model (MUED), the littlest Higgs model with T-parity (LHT), or the minimal supersymmetric Standard Model (MSSM), using only the measurement of the product of gluon-fusion production cross section and the di-photon branching ratio. In MUED, by decoupling any new physics sufficiently to evade the discovery reach at the LHC, the deviation of the signal from the SM is not statistically significant. However, in LHT and MSSM, it is possible to have a significant deviation in the signal that is consistent with this "lone Higgs scenario", and, in the case of a very large suppression, we can distinguish MSSM and LHT before the discovery of any new resonances. Starting with the lone Higgs scenario and the deviation in this measurement from the Standard Model prediction (whether or not statistically significant), we offer tests that may discriminate the models and search strategies of discovering new physics signatures with increasing integrated luminosity.

32 pages, 25 figures, PRD version

References in corpus (7)

• Dark Matter and Collider Phenomenology of Universal Extra Dimensions
• Hunting for the Top Partner in the Littlest Higgs Model with T-parity at the LHC
• Search for Heavy Neutral MSSM Higgs Bosons with CMS: Reach and Higgs-Mass Precision
• LHC signals of T-odd heavy quarks in the Littlest Higgs model
• Signatures of Extra Gauge Bosons in the Littlest Higgs Model with T-parity at Future Colliders
• The Higgs Decay Width in Multi-Scalar Doublet Models
• New Physics Effects in Higgs Decay to Tau Leptons