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Journal of High Energy Physics

, 2019:98 | Cite as

New emerging results in Higgs precision analysis updates 2018 after establishment of third-generation Yukawa couplings

  • Kingman Cheung
  • Jae Sik LeeEmail author
  • Po-Yan Tseng
Open Access
Regular Article - Theoretical Physics
  • 20 Downloads

Abstract

We perform global fits of the Higgs boson couplings to all the 7 TeV, 8 TeV, and 13 TeV data available up to the Summer 2018. New measurements at 13 TeV extend to include the Higgs signal strengths exclusively measured in associated Higgs production with top-quark pair and the third-generation Yukawa couplings now have been established. Some important consequences emerge from the global fits. (i) The overall average signal strength of the Higgs boson stands at 2σ above the SM value (μ = 1.10 ± 0.05). (ii) For the first time the bottom-quark Yukawa coupling shows a preference of the positive sign to the negative one. (iii) The negative top-quark Yukawa coupling is completely ruled out unless there exist additional particles running in the H-γ-γ loop with contributions equal to two times the SM top-quark contribution within about 10 %. (iv) The branching ratio for nonstandard decays of the Higgs boson is now below 8.4% at the 95% confidence level.

Keywords

Phenomenological Models 

Notes

Open Access

This article is distributed under the terms of the Creative Commons Attribution License (CC-BY 4.0), which permits any use, distribution and reproduction in any medium, provided the original author(s) and source are credited

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Copyright information

© The Author(s) 2019

Authors and Affiliations

  • Kingman Cheung
    • 1
    • 2
    • 3
    • 4
  • Jae Sik Lee
    • 1
    • 5
    • 6
    Email author
  • Po-Yan Tseng
    • 1
    • 7
  1. 1.Physics Division, National Center for Theoretical SciencesHsinchuTaiwan
  2. 2.Department of PhysicsNational Tsing Hua UniversityHsinchuTaiwan
  3. 3.Division of Quantum Phases and Devices, School of PhysicsKonkuk UniversitySeoulRepublic of Korea
  4. 4.Department of PhysicsNational Central UniversityChungliTaiwan
  5. 5.Department of PhysicsChonnam National UniversityGwangjuRepublic of Korea
  6. 6.Institute for Universe and Elementary ParticlesChonnam National UniversityGwangjuRepublic of Korea
  7. 7.Kavli IPMU (WPI), UTIASThe University of TokyoChibaJapan

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