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Title: Interference in the $$gg\rightarrow h \rightarrow \gamma\gamma$$ On-Shell Rate and the Higgs Boson Total Width

Abstract

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. Fermilab
  2. Chicago U., KICP
Publication Date:
Research Org.:
Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
OSTI Identifier:
1358106
Report Number(s):
FERMILAB-PUB-17-131-T; arXiv:1704.08259
1597134
DOE Contract Number:
AC02-07CH11359
Resource Type:
Journal Article
Resource Relation:
Journal Name: TBD
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS

Citation Formats

Campbell, John, Carena, Marcela, Harnik, Roni, and Liu, Zhen. Interference in the $gg\rightarrow h \rightarrow \gamma\gamma$ On-Shell Rate and the Higgs Boson Total Width. United States: N. p., 2017. Web.
Campbell, John, Carena, Marcela, Harnik, Roni, & Liu, Zhen. Interference in the $gg\rightarrow h \rightarrow \gamma\gamma$ On-Shell Rate and the Higgs Boson Total Width. United States.
Campbell, John, Carena, Marcela, Harnik, Roni, and Liu, Zhen. 2017. "Interference in the $gg\rightarrow h \rightarrow \gamma\gamma$ On-Shell Rate and the Higgs Boson Total Width". United States. doi:. https://www.osti.gov/servlets/purl/1358106.
@article{osti_1358106,
title = {Interference in the $gg\rightarrow h \rightarrow \gamma\gamma$ On-Shell Rate and the Higgs Boson Total Width},
author = {Campbell, John and Carena, Marcela and Harnik, Roni and Liu, Zhen},
abstractNote = {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 = {},
journal = {TBD},
number = ,
volume = ,
place = {United States},
year = 2017,
month = 4
}
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