Hiding the Higgs Boson from Prying Eyes
Ernest Ma (UC Riverside)

TL;DR
This paper explores mechanisms by which the Higgs boson could evade detection at colliders, including invisible decays into dark matter and mixing with a heavy scalar that suppresses its observable signals.
Contribution
It introduces two simple scenarios that can hide the Higgs boson from collider searches, expanding potential explanations for non-observation.
Findings
Higgs can decay invisibly into dark matter particles.
Higgs mixing with a heavy scalar can suppress its collider signals.
Heavy scalar may be beyond current collider reach.
Abstract
There are two simple ways that the Higgs boson H of the Standard Model (SM) may be more difficult to observe than expected at the Large Hadron Collider (LHC) or the Tevatron. One is well-known, i.e. H decays invisibly, into dark-matter scalar particles for example. The other is that H mixes with a heavy singlet scalar S which couples to new colored fermions and scalars. Of the two mass eigenstates, the lighter one could (accidentally) have a suppressed effective coupling to two gluons, and the heavy one could be kinematically beyond the reach of the LHC.
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