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Article overview
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Interference in the $gg
ightarrow h
ightarrow gammagamma$ On-Shell Rate and the Higgs Boson Total Width | | John Campbell
; Marcela Carena
; Roni Harnik
; Zhen Liu
; | | Date: |
26 Apr 2017 | | Abstract: | We consider interference between the Higgs signal and QCD background in
$gg
ightarrow h
ightarrow gammagamma$ and its effect on the on-shell Higgs
rate. The existence of sizable strong phases leads to destructive interference
of about 2% of the on-shell cross section in the Standard Model. This effect
can be enhanced by beyond the standard model physics. In particular, since it
scales differently from the usual rates, the presence of interference allows
indirect limits to be placed on the Higgs width in a novel way, using on-shell
rate measurements. Our study motivates further QCD calculations to reduce
uncertainties. We discuss potential width-sensitive observables, both using
total and differential rates and find that the HL-LHC can potentially
indirectly probe widths of order tens of MeV. | | Source: | arXiv, 1704.8259 | | Services: | Forum | Review | PDF | Favorites | |
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