750 GeV diphotons from a D3-brane Article Swipe
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· 2016
· Open Access
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· DOI: https://doi.org/10.1016/j.nuclphysb.2016.02.031
· OA: W2204604615
Motivated by the recently reported diphoton excess at 750 GeV observed by\nboth CMS and ATLAS, we study string-based particle physics models which can\naccommodate this signal. Quite remarkably, although Grand Unified Theories in\nF-theory tend to impose tight restrictions on candidate extra sectors, the case\nof a probe D3-brane near an E-type Yukawa point naturally leads to a class of\nstrongly coupled models capable of accommodating the observed signature. In\nthese models, the visible sector is realized by intersecting 7-branes, and the\n750 GeV resonance is a scalar modulus associated with motion of the D3-brane in\nthe direction transverse to the Standard Model 7-branes. Integrating out heavy\n3-7 string messenger states leads to dimension five operators for gluon fusion\nproduction and diphoton decays. Due to the unified structure of interactions,\nthese models also predict that there should be additional decay channels to ZZ\nand Z gamma. We also comment on models with distorted unification, where both\nthe production mechanism and decay channels can differ.\n
