Comments on the diphoton excess: critical reappraisal of effective field theory interpretations

Jernej F. Kamenik, Benjamin R. Safdi, Yotam Soreq, Jure Zupan

Research output: Contribution to journalArticlepeer-review


We consider the diphoton excess observed by ATLAS and CMS using the most up-to-date data and estimate the preferred enhancement in the production rate between 8 TeV and 13 TeV. Within the framework of effective field theory (EFT), we then show that for both spin-0 and spin-2 Standard Model (SM) gauge-singlet resonances, two of the three processes S → ZZ, S → Zγ, and S → W W must occur with a non-zero rate. Moreover, we demonstrate that these branching ratios are highly correlated in the EFT. Couplings of S to additional SM states may be constrained and differentiated by comparing the S production rates with and without the vector-boson fusion (VBF) cuts. We find that for a given VBF to inclusive production ratio there is maximum rate of S to gauge bosons, bb¯ , and lighter quark anti-quark pairs. Simultaneous measurements of the width and the VBF ratio may be able to point towards the existence of hidden decays.

Original languageEnglish
Article number42
JournalJournal of High Energy Physics
Issue number7
StatePublished - 1 Jul 2016
Externally publishedYes


  • Beyond Standard Model
  • Effective field theories

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics


Dive into the research topics of 'Comments on the diphoton excess: critical reappraisal of effective field theory interpretations'. Together they form a unique fingerprint.

Cite this