2015/12/31 by Jonathan J. Heckman · 5 citations
Physics and Astronomy · #Brane #Brane cosmology #Extra dimensions #Geometry #Grand Unified Theory #Hidden sector #High-Energy Particle Collisions Research #Particle physics #Particle physics theoretical and experimental studies #Physics #Physics beyond the Standard Model #Quantum Chromodynamics and Particle Interactions #Scalar (mathematics) #String (physics) #Supersymmetry #Theoretical physics #Yukawa potential #hep-ph #hep-th
paper · pdf · doi:10.1016/j.nuclphysb.2016.02.031
v3: 12 pages, 1 figure, clarifications added
openalex publication_date 2016/03/08 · arxiv created 2016/04/27 · arxiv updated 2016/04/28 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/06
Motivated by the recently reported diphoton excess at 750 GeV observed by both CMS and ATLAS, we study string-based particle physics models which can accommodate this signal. Quite remarkably, although Grand Unified Theories in F-theory tend to impose tight restrictions on candidate extra sectors, the case of a probe D3-brane near an E-type Yukawa point naturally leads to a class of strongly coupled models capable of accommodating the observed signature. In these models, the visible sector is realized by intersecting 7-branes, and the 750 GeV resonance is a scalar modulus associated with motion of the D3-brane in the direction transverse to the Standard Model 7-branes. Integrating out heavy 3–7 string messenger states leads to dimension five operators for gluon fusion production and diphoton decays. Due to the unified structure of interactions, these models also predict that there should be additional decay channels to ZZ and Zγ. We also comment on models with distorted unification, where both the production mechanism and decay channels can differ.