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

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.
Authors:
 [1] ;  [2] ;  [1] ;  [1]
  1. Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
  2. Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States); Univ. of Chicago, Chicago, IL (United States)
Publication Date:
Report Number(s):
FERMILAB-PUB-17-131-T; arXiv:1704.08259
Journal ID: ISSN 0031-9007; PRLTAO; 1597134
Grant/Contract Number:
AC02-07CH11359
Type:
Accepted Manuscript
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 119; Journal Issue: 18; Journal ID: ISSN 0031-9007
Publisher:
American Physical Society (APS)
Research Org:
Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Sponsoring Org:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
OSTI Identifier:
1358106

Campbell, John, Carena, Marcela, Harnik, Roni, and Liu, Zhen. Interference in the gg→h→γγ On-Shell Rate and the Higgs Boson Total Width. United States: N. p., Web. doi:10.1103/PhysRevLett.119.181801.
Campbell, John, Carena, Marcela, Harnik, Roni, & Liu, Zhen. Interference in the gg→h→γγ On-Shell Rate and the Higgs Boson Total Width. United States. doi:10.1103/PhysRevLett.119.181801.
Campbell, John, Carena, Marcela, Harnik, Roni, and Liu, Zhen. 2017. "Interference in the gg→h→γγ On-Shell Rate and the Higgs Boson Total Width". United States. doi:10.1103/PhysRevLett.119.181801.
@article{osti_1358106,
title = {Interference in the gg→h→γγ On-Shell Rate and the Higgs Boson Total Width},
author = {Campbell, John and Carena, Marcela and Harnik, Roni and Liu, Zhen},
abstractNote = {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.},
doi = {10.1103/PhysRevLett.119.181801},
journal = {Physical Review Letters},
number = 18,
volume = 119,
place = {United States},
year = {2017},
month = {10}
}