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16 February 2025
 
  » arxiv » 1605.0206

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750 GeV diphoton resonance and electric dipole moments
Kiwoon Choi ; Sang Hui Im ; Hyungjin Kim ; Doh Young Mo ;
Date 1 May 2016
AbstractWe examine the implication of the recently observed 750 GeV diphoton excess for the electric dipole moments of the neutron and electron. If the excess is due to a spin zero resonance which couples to photons and gluons through the loops of massive vector-like fermions, the resulting neutron electric dipole moment can be comparable to the present experimental bound if the CP-violating angle {alpha} in the underlying new physics is of O(10^{-1}). An electron EDM comparable to the present bound can be achieved through a mixing between the 750 GeV resonance and the Standard Model Higgs boson, if the mixing angle itself for an approximately pseudoscalar resonance, or the mixing angle times the CP-violating angle {alpha} for an approximately scalar resonance, is of O(10^{-3}). For the case that the 750 GeV resonance corresponds to a composite pseudo-Nambu-Goldstone boson formed by a QCD-like hypercolor dynamics confining at Lambda_HC, the resulting neutron EDM can be estimated with alpha ~ (750 GeV / Lambda_HC)^2 heta_HC, where heta_HC is the hypercolor vacuum angle.
Source arXiv, 1605.0206
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