LHC 750 GeV diphoton excess in a radiative seesaw model

Shinya Kanemura; Kenji Nishiwaki; Hiroshi Okada; Yuta Orikasa; Seong Chan Park; Ryoutaro Watanabe

doi:10.1093/ptep/ptw164

LHC 750 GeV diphoton excess in a radiative seesaw model

Shinya Kanemura, Kenji Nishiwaki, Hiroshi Okada, Yuta Orikasa, Seong Chan Park, Ryoutaro Watanabe

Department of Physics

Research output: Contribution to journal › Article › peer-review

15 Citations (Scopus)

Abstract

We investigate a possibility for explaining the recently announced 750 GeV diphoton excess by the ATLAS and CMS experiments at the CERN Large Hadron Collider in a model with multiple doubly charged particles, that was originally suggested for explaining tiny neutrino masses through a three-loop effect in a natural way. The enhanced radiatively generated effective coupling of a new singlet scalar S with diphoton with multiple charged particles in the loop enlarges the production rate of S in pp → S +X via a photon fusion process and also the decay width Γ(S → γ γ ) even without assuming a tree-level production mechanism. We provide detailed analysis on the cases with or without allowing mixing between S and the standard model Higgs doublet.

Original language	English
Article number	123B04
Journal	Progress of Theoretical and Experimental Physics
Volume	2016
Issue number	12
DOIs	https://doi.org/10.1093/ptep/ptw164
Publication status	Published - 2016 Dec 19

Bibliographical note

Publisher Copyright:
© The Author(s) 2016.

All Science Journal Classification (ASJC) codes

Physics and Astronomy(all)

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10.1093/ptep/ptw164

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AU - Nishiwaki, Kenji

AU - Okada, Hiroshi

AU - Orikasa, Yuta

AU - Park, Seong Chan

AU - Watanabe, Ryoutaro

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LHC 750 GeV diphoton excess in a radiative seesaw model

Abstract

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