Searching for the intermediate-mass Higgs boson

Abstract

We study the feasibility of detecting a neutral Higgs boson H o , with mass between 2m, =. 80 GeV (by assumption) and 2m w at an e +e -machine or the Superconducting Super Collider (SSC). Backgrounds to the production at an e + e -machine of H O in association with a Z are calculated with particular emphasis on the case when m~ =m,. We present a detailed survey of the signals for and backgrounds to the inclusive or associated production at the SSC of H 0 followed by the decay of H O into one of the available channels. There is no signature which is established to be identifiable at the SSC. Only a few signatures remain to be studied, and the further calculations of most immediate interest are pointed out.

Isolating a light Higgs boson from the diphoton background at the CERN LHC

“…The LHC will completely cover the low mass region preferred by precision electroweak fits and the MSSM, as well as much higher masses. For m H < 140 GeV, the most important mode involves production via gluon fusion, gg → H, followed by the rare decay into two photons, H → γγ [7,8]. Although this mode has a very large continuum γγ background [9], the narrow width of the Higgs boson, combined with the mass resolution of order 1% achievable in the LHC detectors, allows one to measure the background experimentally and subtract it from a putative signal peak [10,11,12,13].…”

“…The third term contains the gg → γγg squared matrix element (8), minus the two dipole subtractions mentioned above,…”

The anatomy of electroweak symmetry breaking

“…The various detection channels at the LHC [315][316][317][318][319] and at the Tevatron [320][321][322][323] and [319] will be discussed in §3.7.…”

Higgs physics: Theory

“…In the gg fusion mechanism, the detection channels for a light Higgs boson, M H < ∼ 160 GeV are [58]: H → γγ (mostly for M H < ∼ 140 GeV), H → ZZ * → 4ℓ ± and H → W W ( * ) → ℓℓνν with ℓ = e, µ (for masses below, respectively, 2M W and 2M Z ). For 160 < ∼ M H < ∼ 180 GeV, only H → W W → ℓℓνν is possible.…”