“A composite model for the 750 GeV diphoton excess,” by Keisuke Harigaya (UC Berkeley)

Tuesday, May 17, 2016 - 4:00pm to 5:00pm
TEPAPP Seminars

Theory of Elementary Particles, Astroparticle Physics, and Phenomenology (TEPAPP) Seminar

Physics & Astronomy Building (PAB) Room 4-330
Tuesday, May 17, 2016

Guest Speaker: Keisuke Harigaya (UC Berkeley) 

Talk Title: “A composite model for the 750 GeV diphoton excess"


We study a simple model in which the recently reported 750 GeV diphoton excess arises from a composite pseudo Nambu-Goldstone boson (hidden pion) produced by gluon fusion and decaying into two photons. The model introduces an extra hidden gauge group at the TeV scale with a vectorlike quark in the bifundamental representation of the hidden and standard model gauge groups. We discuss the collider phenomenology and cosmology of hidden pions and other hidden resonances. We discuss possible theoretical structures above the TeV scale, e.g. conformal dynamics and supersymmetry, and their phenomenological implications.

PAB 4-330