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Title: Model-independent determination of the triple Higgs coupling at e + e colliders

Here, the observation of Higgs pair production at high-energy colliders can give evidence for the presence of a triple Higgs coupling. However, the actual determination of the value of this coupling is more difficult. In the context of general models for new physics, double Higgs production processes can receive contributions from many possible beyond-Standard-Model effects. This dependence must be understood if one is to make a definite statement about the deviation of the Higgs field potential from the Standard Model. In this paper, we study the extraction of the triple Higgs coupling from the process e +e →Zhh. We show that, by combining the measurement of this process with other measurements available at a 500 GeV e +e collider, it is possible to quote model-independent limits on the effective field theory parameter c 6 that parametrizes modifications of the Higgs potential. We present precise error estimates based on the anticipated International Linear Collider physics program, studied with full simulation. Our analysis also gives new insight into the model-independent extraction of the Higgs boson coupling constants and total width from e +e data.
Authors:
 [1] ;  [2] ;  [3] ;  [1] ;  [4]
  1. Stanford Univ., Menlo Park, CA (United States). SLAC
  2. High Energy Accelerator Research Organization (KEK), Ibaraki (Japan)
  3. Stanford Univ., Menlo Park, CA (United States). SLAC; Seoul National Univ., Seoul (Korea)
  4. Univ. of Tokyo, Tokyo (Japan)
Publication Date:
Report Number(s):
SLAC–PUB-17130
Journal ID: ISSN 2470-0010; PRVDAQ
Grant/Contract Number:
AC02–76SF00515; 2015R1A4A1042542; 2017R1D1A1B03030820; 16H02173; 16H02176; 15H02083
Type:
Accepted Manuscript
Journal Name:
Physical Review D
Additional Journal Information:
Journal Volume: 97; Journal Issue: 5; Journal ID: ISSN 2470-0010
Publisher:
American Physical Society (APS)
Research Org:
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
OSTI Identifier:
1436965