Hiding a Higgs width enhancement from off-shell gg (--> h*) --> ZZ measurements
Heather E. Logan (Carleton U.)
TL;DR
This paper discusses how off-shell Higgs measurements used to constrain its width can be misleading if lighter neutral Higgs bosons exist, highlighting potential limitations in current indirect width constraints.
Contribution
It reveals that the presence of lighter neutral Higgs bosons can invalidate the interpretation of off-shell measurements as width constraints.
Findings
Off-shell Higgs measurements can be affected by lighter Higgs bosons.
Current width constraints may be invalidated by additional Higgs states.
Implications for Higgs property measurements and searches.
Abstract
Measurements of the off-shell Higgs boson production cross section in gg (--> h*) --> ZZ have recently been used by the CMS and ATLAS collaborations to indirectly constrain the total width of the Higgs boson. I point out that the interpretation of these measurements as a Higgs width constraint can be invalidated if additional neutral Higgs boson(s) are present with masses below about 350 GeV.
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