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High Energy Physics - Phenomenology

arXiv:1602.07691 (hep-ph)
[Submitted on 24 Feb 2016 (v1), last revised 26 Apr 2016 (this version, v2)]

Title:The NMSSM lives: with the 750 GeV diphoton excess

Authors:F. Domingo, S. Heinemeyer, J.S. Kim, K. Rolbiecki
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Abstract:We propose an NMSSM scenario that can explain the excess in the diphoton spectrum at 750 GeV recently observed by ATLAS and CMS. We show that in a certain limit with a very light pseudoscalar one can reproduce the experimental results without invoking exotic matter. The 750 GeV excess is produced by two resonant heavy Higgs bosons with masses ~750 GeV, that subsequently decay to two light pseudoscalars. Each of these decays to collimated photon pairs that appear as a single photon in the electromagnetic calorimeter. A mass gap between heavy Higgses mimics a large width of the 750 GeV peak. The production mechanism, containing a strong component via initial b quarks, ameliorates a possible tension with 8 TeV data compared to other production modes. We also discuss other constraints, in particular from low energy experiments. Finally, we discuss possible methods that could distinguish our proposal from other physics models describing the diphoton excess in the Run-II of the LHC.
Comments: 24 pages, 4 figures; minor text improvements; to appear in EPJC
Subjects: High Energy Physics - Phenomenology (hep-ph)
Report number: IFT-UAM/CSIC-16-019
Cite as: arXiv:1602.07691 [hep-ph]
  (or arXiv:1602.07691v2 [hep-ph] for this version)
  https://doi.org/10.48550/arXiv.1602.07691
Related DOI: https://doi.org/10.1140/epjc/s10052-016-4080-2

Submission history

From: Krzysztof Rolbiecki [view email]
[v1] Wed, 24 Feb 2016 21:00:04 UTC (546 KB)
[v2] Tue, 26 Apr 2016 09:27:37 UTC (542 KB)
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