Abstract
The chiral anomaly provides smoking-gun evidence of a new confining gauge theory. Motivated by a reported event excess in a diphoton invariant mass distribution at the LHC, we discuss a scenario that a pseudo-Nambu-Goldstone (PNG) boson of a new QCD-like theory is produced by gluon fusion and decays into a pair of the standard model gauge bosons. Despite the strong dynamics, the production cross section and the decay widths are determined by an anomaly matching condition. The excess can be explained by the PNG boson with mass of around 750 GeV. The model also predicts exotic hadrons such as a color-octet scalar and baryons. Some of them are within the reach of the LHC experiment.
- Received 18 December 2015
DOI:https://doi.org/10.1103/PhysRevLett.116.151802
© 2016 American Physical Society
Physics Subject Headings (PhySH)
Synopsis
Explaining a 750 GeV Bump
Published 12 April 2016
Theorists try to explain data from the LHC that could be hinting at the existence of new particles.
See more in Physics