Calculation of the contributions to the signals and backgrounds for intermediate mass Higgs detection at the LHC and SSC from the q qbar initial state

Details Calculation of the contributions to the signals and backgrounds for intermediate mass Higgs detection at the LHC and SSC from the q qbar initial state Calculation of the contributions to the signals and backgrounds for intermediate mass Higgs detection at the LHC and SSC from the q qbar initial state

1993-02-23

arxiv.org/abs/hep-ph/9302294v2

Phys.Lett. B306 (1993) 129-133

Physics

High Energy Physics

High Energy Physics - Phenomenology

TeX, 8 pages, 2 figures (not included - available upon request) DTP/93/2 .... missing reference file now included

Scientific paper

10.1016/0370-2693(93)91149-H

We calculate the subprocess q qbar --> t tbar H which contributes to the signal for detection of a light `intermediate mass' Higgs boson at the LHC and SSC in the isolated lepton and two isolated photons mode. This enhances the gg --> t tbar H signal by about 10% at the SSC and 25% at the LHC. We also calculate the q qbar --> t tbar gamma gamma irreducible background subprocess to this detection mode which enhances the gg --> t tbar gamma gamma irreducible background. This background is found to be quite substantial due to the effect of radiation from the initial state quarks as well as the final state t tbar pair; at the SSC the q qbar initial state background enhances the gg initial state background by between 20% for m_t=100 GeV and 35% for m_t=180 GeV, and at the LHC by between 50% for m_t=100 GeV and 120% for m_t=180 GeV. However with a 3% mass resolution on the gamma gamma mass the extra q qbar background events are typically smaller than the extra q qbar signal events, and the signal remains observable.

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