String Consistency, Heavy Exotics, and the 750 GeV Diphoton Excess at the LHC: Addendum
arXiv:1602.06257
Abstract
We study models with heavy exotics that account for the LHC GeV diphoton excess in light of current vector-like quark bounds. Utilizing only exotics that may appear in three-stack and four-stack D-brane models, we show that a narrow width diphoton excess can be accounted for while evading existing bounds if multiple exotics are added, with vector-like leptons of mass GeV and vector-like quarks with masses up to TeV. However, a large width , as suggested by the ATLAS data, cannot be easily accommodated in this framework. Renormalization group equations with GUT-scale boundary conditions show that these supersymmetric models are perturbative and stable. Type IIA compactifications on toroidal orbifolds allow for Yukawa couplings in the ultraviolet.
arXiv comment12 pages
References in corpus (5)
Cited by in corpus (15)
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