Scalar production in association with a Z boson at the LHC and ILC: The mixed Higgs-radion case of warped models

Andrei Angelescu, Grégory Moreau, and François Richard
Phys. Rev. D 96, 015019 – Published 19 July 2017

Abstract

The radion scalar field might be the lightest new particle predicted by extradimensional extensions of the standard model. It could thus lead to the first signatures of new physics at the LHC collider. We perform a complete study of the radion production in association with the Z gauge boson in the custodially protected warped model with a brane-localized Higgs boson addressing the gauge hierarchy problem. Radion-Higgs mixing effects are present. Such a radion production receives possibly resonant contributions from the Kaluza-Klein excitations of the Z boson as well as the extra neutral gauge boson (Z’). All the exchange and mixing effects induced by those heavy bosons are taken into account in the radion coupling and rate calculations. The investigation of the considered radion production at the LHC allows us to be sensitive to some parts of the parameter space but only the ILC program at high luminosity would cover most of the theoretically allowed parameter space via the studied reaction. Complementary tests of the same theoretical parameters can be realized through the high accuracy measurements of the Higgs couplings at the ILC. The generic sensitivity limits on the rates discussed for the LHC and ILC potential reach can be applied to the searches for other (light) exotic scalar bosons.

  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
3 More
  • Received 11 April 2017

DOI:https://doi.org/10.1103/PhysRevD.96.015019

© 2017 American Physical Society

Physics Subject Headings (PhySH)

Particles & Fields

Authors & Affiliations

Andrei Angelescu1,*, Grégory Moreau1,†, and François Richard2,‡

  • 1Laboratoire de Physique Théorique, Bât. 210, CNRS, Univ. Paris Sud, Université Paris-Saclay, F-91405 Orsay Cedex, France
  • 2Laboratoire de l’Accélérateur Linéaire, IN2P3/CNRS, Univ. Paris Sud, Université Paris-Saclay, B.P. 34 F-91898 Orsay Cedex, France

  • *andrei.angelescu@th.u-psud.fr
  • gregory.moreau@th.u-psud.fr
  • richard@lal.in2p3.fr

Article Text (Subscription Required)

Click to Expand

References (Subscription Required)

Click to Expand
Issue

Vol. 96, Iss. 1 — 1 July 2017

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
×