Observability of the lightest CMSSM Higgs boson at hadron colliders

John Ellis, Sven Heinemeyer, Keith A. Olive, Georg Weiglein

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We discuss the observability of the lightest neutral Higgs boson in the constrained MSSM (CMSSM), with universal soft supersymmetry-breaking parameters, at hadron colliders such as the Tevatron and the LHC. We take account of the constraints on parameter space provided by LEP, the measured rate of b → sγ decay, the cosmological relic density Ωχh2, and the recent measurement of gμ - 2. We normalize products of the expected CMSSM Higgs production cross sections and decay branching ratios σ × β relative to those expected for a Standard Model Higgs boson of the same mass. In the h → γγ channel, we find that [σ(gg → h) × β(h → γγ)]CMSSM ≳ 0.85 × [σ(gg → h) × β(h → γγ)]SM. In the W±/t̄t + h, h → b̄b channels, we find that [σ(W±/t̄t + h) × β(h → b̄b)]CMSSM ∼ 1.05 × [σ(W±/t̄t + h) × β(h → b̄b)]SM. We conclude that the lightest CMSSM Higgs boson should be almost as easy to see as the Standard Model Higgs boson: in particular, it should be discoverable with about 15 fb-1 of luminosity at the Tevatron or 10 fb-1 of luminosity at the LHC.

Original languageEnglish (US)
Pages (from-to)348-358
Number of pages11
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Issue number3-4
StatePublished - Aug 30 2001

Bibliographical note

Funding Information:
We thank Geri Ganis for useful information and Fabiola Gianotti for an interesting discussion. The work of K.A.O. was partially supported by DOE grant DE-FG02-94ER-40823.


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