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VOLUME 103 (2016) | ISSUE 9 | PAGE 635
New Physics at 1 TeV?
Abstract
If decays of a heavy particle S are responsible for the diphoton excess with invariant mass 750 GeV observed at the 13 TeV LHC run, it can be easily accomodated in the Standard Model. Two scenarios are considered: production in gluon fusion through a loop of heavy isosinglet quark(s) and production in photon fusion through a loop of heavy isosinglet leptons. In the second case many heavy leptons are needed orand they should have large electric charges in order to reproduce experimental data on σpp → SX • Br(S → γ γ).