Interference in the gg→h→γγ On-Shell Rate and the Higgs Boson Total Width

Campbell, John; Carena, Marcela; Harnik, Roni; Liu, Zhen

doi:10.1103/PhysRevLett.119.181801

Title: Interference in the $g g \to h \to γ γ$ On-Shell Rate and the Higgs Boson Total Width

Journal Article · Mon Oct 30 00:00:00 EDT 2017 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.119.181801· OSTI ID:1358106

Campbell, John ^[1]; Carena, Marcela ^[2]; Harnik, Roni ^[1]; Liu, Zhen ^[1]

Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States); Univ. of Chicago, Chicago, IL (United States)

Here, we consider interference between the Higgs signal and QCD background in $$gg\rightarrow h \rightarrow \gamma\gamma$$ 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.

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Research Organization:: Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)

Sponsoring Organization:: USDOE Office of Science (SC), High Energy Physics (HEP)

Grant/Contract Number:: AC02-07CH11359

OSTI ID:: 1358106

Report Number(s):: FERMILAB-PUB-17-131-T; arXiv:1704.08259; PRLTAO; 1597134

Journal Information:: Physical Review Letters, Vol. 119, Issue 18; ISSN 0031-9007

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 16 works

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