skip to main content

DOE PAGESDOE PAGES

This content will become publicly available on January 11, 2017

Title: Probing triple-Higgs productions via 4b2γ decay channel at a 100 TeV hadron collider

We report that the quartic self-coupling of the Standard Model Higgs boson can only be measured by observing the triple-Higgs production process, but it is challenging for the LHC Run 2 or International Linear Collider (ILC) at a few TeV because of its extremely small production rate. In this paper, we present a detailed Monte Carlo simulation study of the triple-Higgs production through gluon fusion at a 100 TeV hadron collider and explore the feasibility of observing this production mode. We focus on the decay channel HHH →$$b\bar{b}$$$$b\bar{b}$$γγ, investigating detector effects and optimizing the kinematic cuts to discriminate the signal from the backgrounds. Our study shows that, in order to observe the Standard Model triple-Higgs signal, the integrated luminosity of a 100 TeV hadron collider should be greater than 1.8×104 ab₋1. We also explore the dependence of the cross section upon the trilinear (λ3) and quartic (λ4) self-couplings of the Higgs. Ultimately, we find that, through a search in the triple-Higgs production, the parameters λ3 and λ4 can be restricted to the ranges [₋1,5] and [₋20,30], respectively. We also examine how new physics can change the production rate of triple-Higgs events. For example, in the singlet extension of the Standard Model, we find that the triple-Higgs production rate can be increased by a factor of O(10).
Authors:
 [1] ;  [2] ;  [3] ;  [4] ;  [5]
  1. Brookhaven National Lab. (BNL), Upton, NY (United States); Univ. of Victoria, BC (Canada); Perimeter Inst. for Theoretical Physics, Waterloo, ON (Canada)
  2. Univ. of Chinese Academy of Sciences (CAS), Beijing (China); Peking Univ., Beijing (China); Chinese Academy of Sciences (CAS), Beijing (China). Center for future high energy physics
  3. Univ. of Chinese Academy of Sciences (CAS), Beijing (China)
  4. Univ. of Chinese Academy of Sciences (CAS), Beijing (China); Univ. of Siegen, Siegen (Germany)
  5. Stony Brook Univ., NY (United States)
Publication Date:
OSTI Identifier:
1260148
Report Number(s):
BNL--112256-2016-JA
Journal ID: ISSN 2470-0010; PRVDAQ; KA2401012
Grant/Contract Number:
SC0012704; AC02-76SF00515; AC02- 98CH10886; SC0008061
Type:
Accepted Manuscript
Journal Name:
Physical Review D
Additional Journal Information:
Journal Volume: 93; Journal Issue: 1; Journal ID: ISSN 2470-0010
Publisher:
American Physical Society (APS)
Research Org:
Brookhaven National Laboratory (BNL), Upton, NY (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 Higgs; decay; LHC; hadron; TeV; ILC