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This content will become publicly available on March 24, 2017

Title: Interference effect on a heavy Higgs resonance signal in the γγ and ZZ channels

The resonance-continuum interference is usually neglected when the width of a resonance is small compared to the resonance mass. We reexamine this standard by studying the interference effects in high-resolution decay channels, γγ and ZZ, of the heavy Higgs boson H in nearly aligned two-Higgs-doublet models. For the H with a sub-percent width-to-mass ratio, we find that, in the parameter space where the LHC 14 TeV ZZ resonance search can be sensitive, the interference effects can modify the ZZ signal rate by O(10)% and the exclusion reach by O(10) GeV. In other parameter space where the ZZ or γγ signal rate is smaller, the LHC 14 TeV reach is absent, but a resonance shape can be much more dramatically changed. In particular, the γγ signal rate can change by O(100)%. Relevant to such parameter space, we suggest variables that can characterize a general resonance shape. Furthermore, we also illustrate the relevance of the width on the interference by adding nonstandard decay modes of the heavy Higgs boson.
Authors:
 [1] ;  [2] ;  [3]
  1. KonKuk Univ., Seoul (Korea)
  2. KonKuk Univ., Seoul (Korea); Korea Institute for Advanced Study, Seoul (Korea)
  3. Korea Institute for Advanced Study, Seoul (Korea); SLAC National Accelerator Lab., Menlo Park, CA (United States)
Publication Date:
OSTI Identifier:
1261083
Report Number(s):
SLAC-PUB--16434
Journal ID: ISSN 2470-0010; PRVDAQ; arXiv:1510.03450
Grant/Contract Number:
AC02-76SF00515; 2013R1A1A2061331; 2012R1A2A1A01006053
Type:
Accepted Manuscript
Journal Name:
Physical Review D
Additional Journal Information:
Journal Volume: 93; Journal Issue: 5; Journal ID: ISSN 2470-0010
Publisher:
American Physical Society (APS)
Research Org:
SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (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 phenomenology-HEP; HEPPH