Rays of light from the LHC

By S. Knapen, Tom Melia, K. Zurek. 2015

171 citations recorded by the source corpus.

We consider models for the di-photon resonance observed at ATLAS (with 3.6  fb-1) and CMS (with 2.6  fb-1). We find there is no conflict between the signal reported at 13 TeV and the constraints from both experiments at 8 TeV with 20.3  fb-1. We make a simple argument for why the decay to the γγ mode must be generated by additional, beyond the standard model (SM) states. We explore four viable options: (i) resonance production and decay through loops of messenger fermions or scalars, (ii) a resonant messenger which decays to the di-photon resonance+X, (iii) an edge configuration where A→Bγ→Cγγ, and (iv) Hidden Valley-like models where the resonance decays to a pair of very light (sub-GeV) states, each of which in turn decays to a pair of collimated photons that cannot be distinguished from a single photon. Since in each case multiple new states have been introduced, a wealth of signatures is expected to ensue at run 2 of the LHC.

Subfields: Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/f765478edd542ca01e7469c06f2bf62fdea943d7

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In Nuclear and High Energy Physics

  1. M. Raidal
  2. G. Arcadi
  3. Abdelhak Djouadi
  4. Alessandro Strumia
  5. K. Kannike
  6. Atlas Collaboration
  7. Cms Collaboration
  8. Alexander Pukhov

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