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Title: 8D likelihood effective Higgs couplings extraction framework in h → 4ℓ

We present an overview of a comprehensive analysis framework aimed at performing direct extraction of all possible effective Higgs couplings to neutral electroweak gauge bosons in the decay to electrons and muons, the so called ‘golden channel’. Our framework is based primarily on a maximum likelihood method constructed from analytic expressions of the fully differential cross sections for h → 4l and for the dominant irreducible $$ q\overline{q} $$ → 4l background, where 4l = 2e2μ, 4e, 4μ. Detector effects are included by an explicit convolution of these analytic expressions with the appropriate transfer function over all center of mass variables. Utilizing the full set of observables, we construct an unbinned detector-level likelihood which is continuous in the effective couplings. We consider possible ZZ, Zγ, and γγ couplings simultaneously, allowing for general CP odd/even admixtures. A broad overview is given of how the convolution is performed and we discuss the principles and theoretical basis of the framework. This framework can be used in a variety of ways to study Higgs couplings in the golden channel using data obtained at the LHC and other future colliders.
 [1] ;  [2] ;  [2] ;  [1] ;  [3] ;  [1]
  1. California Institute of Technology, Pasadena, CA (United States)
  2. Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
  3. Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States); Univ. Paris-Sud, Orsay Cedex (France); Northwestern Univ., Evanston, IL (United States)
Publication Date:
OSTI Identifier:
Report Number(s):
CALT--68-2874; FERMILAB-PUB--13-555-T; NUHEP-TH--13-06; LPT-Orsay--13-100
Journal ID: ISSN 1029-8479; PII: 9643; TRN: US1500456
Grant/Contract Number:
Accepted Manuscript
Journal Name:
Journal of High Energy Physics (Online)
Additional Journal Information:
Journal Name: Journal of High Energy Physics (Online); Journal Volume: 2015; Journal Issue: 1; Journal ID: ISSN 1029-8479
Springer Berlin
Research Org:
Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)
Sponsoring Org:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
Country of Publication:
United States
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS Hadron-Hadron Scattering; Higgs physics