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High Energy Physics - Phenomenology

arXiv:1602.07708 (hep-ph)
[Submitted on 24 Feb 2016]

Title:SU(2) x SU(2) x U(1) Interpretation on the 750 GeV Diphoton Excess

Authors:Jing Ren, Jiang-Hao Yu
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Abstract:We propose that the SU(2) x SU(2) x U(1) (aka G221) models could provide us a 750 GeV scalar resonance that may account for the diphoton excess observed at the LHC while satisfying present collider constraints. The neutral component of the $SU(2)_R$ scalar multiplet can be identified as the 750 GeV scalar. In the lepto-phobic and fermio-phobic G221 models the new charged gauge boson W' could be light, and we find that the diphoton decay width could be dominated by the loop contribution from the $W'$. To initiate gluon fusion production, it is necessary to extend the G221 symmetry to the Pati-Salam and SO(10) symmetry. We investigate the possibilities that the light colored scalars or vectorlike fermions survive in the SO(10) theory and provide large gluon fusion rate for the diphoton signature. It is possible to test the G221 interpretation by direct searches of W' using the multi-gauge boson production channel at the Run 2 LHC.
Comments: 26 pages, 3 figures, 2 tables
Subjects: High Energy Physics - Phenomenology (hep-ph); High Energy Physics - Experiment (hep-ex)
Report number: ACFI-T16-06
Cite as: arXiv:1602.07708 [hep-ph]
  (or arXiv:1602.07708v1 [hep-ph] for this version)
  https://doi.org/10.48550/arXiv.1602.07708

Submission history

From: Jiang-Hao Yu [view email]
[v1] Wed, 24 Feb 2016 21:02:22 UTC (533 KB)
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