As everybody of you may know at LHC they found this probable resonance (https://cds.cern.ch/record/2114808, https://cds.cern.ch/record/2114853?ln=en). It may be a scalar or a KK graviton mode. Now, checking arxiv, one can basically find a lot of models inherent scalars and pseudoscalars trying to explain this resonance.

I am asking: theoretically supposing this resonance is true, can it really be a KK graviton mode? In which model can it produce a diphoton? By coupling to what?

(It's a purely speculative question, but still I would like to understand if anyone has thought to KK graviton models.)

  • $\begingroup$ Wouldn't that only occur at this energy scale if we also had compact extra-dimensions that would show themselves in non-Newtonian gravity at the sub-mm level? I thought that train has left the station with all non-Newtonian gravity experiments failing to see anything? $\endgroup$ – CuriousOne Jan 7 '16 at 8:01
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    $\begingroup$ so far, no resonance has been found. We are still around the 3 sigmas statistical fluctuation. There were many discoveries in the history of particle physics of this kind which turned out to be background fluctuations later on. So prudence before drawing premature conclusions... $\endgroup$ – Paganini Jan 7 '16 at 8:36
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    $\begingroup$ @Paganini: Even a high energy physicist can occasionally dream... I have been watching the long faces at the presentations of CERN data for years now... 30 years of work to build it and run it and nothing but a standard Higgs? That would be a meager result, indeed. You are right, though. Unfortunately. $\endgroup$ – CuriousOne Jan 7 '16 at 8:55
  • $\begingroup$ @CuriousOne: sure, as many physicists, I also hope/dream that this bump is the real first sign of something beyond the Standard Model! $\endgroup$ – Paganini Jan 7 '16 at 9:07
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    $\begingroup$ Ok, edited. Now answer please, if u have understood this point. $\endgroup$ – BLS Jan 7 '16 at 9:36

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