Constraints on CP-violating gauge-Higgs operators

Siddharth Dwivedi, Dilip Kumar Ghosh, Biswarup Mukhopadhyaya, and Ambresh Shivaji
Phys. Rev. D 92, 095015 – Published 10 November 2015

Abstract

We consider the most general set of SU(2)×U(1) invariant CP-violating operators of dimension six, which contribute to VVh interactions (V=W, Z, γ). Our aim is to constrain any CP-violating new physics above the electroweak scale via the effective couplings that arise when such physics is integrated out. For this purpose, we use, in turn, electroweak precision data, global fits of Higgs data at the Large Hadron Collider and the electric dipole moments of the neutron and the electron. We thus impose constraints mainly on two-parameter and three-parameter spaces. We find that the constraints from the electroweak precision data are the weakest. Among the existing Higgs search channels, considerable constraints come from the diphoton signal strength. We note that potential contribution to hγZ may in principle be a useful constraining factor, but it can be utilized only in the high energy run. The contributions to electric dipole moments mostly lead to the strongest constraints, though somewhat fine-tuned combinations of more than one parameter with large magnitudes are allowed. We also discuss constraints on gauge boson trilinear couplings which depend on the parameters of the CP-violating operators.

  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
2 More
  • Received 2 September 2015

DOI:https://doi.org/10.1103/PhysRevD.92.095015

© 2015 American Physical Society

Authors & Affiliations

Siddharth Dwivedi1,*, Dilip Kumar Ghosh2,†, Biswarup Mukhopadhyaya1,‡, and Ambresh Shivaji1,§

  • 1Regional Centre for Accelerator-based Particle Physics, Harish-Chandra Research Institute, Chhatnag Road, Jhunsi, Allahabad 211019, India
  • 2Department of Theoretical Physics, Indian Association for the Cultivation of Science, 2A & 2B Raja S.C. Mullick Road, Kolkata 700032, India

  • *siddharthdwivedi@hri.res.in
  • tpdkg@iacs.res.in
  • biswarup@hri.res.in
  • §ambreshkshivaji@hri.res.in

Article Text (Subscription Required)

Click to Expand

References (Subscription Required)

Click to Expand
Issue

Vol. 92, Iss. 9 — 1 November 2015

Reuse & Permissions
Access Options
Author publication services for translation and copyediting assistance advertisement

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review D

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×