glueball

**standard model of particle physics**

**matter field fermions** (spinors, Dirac fields)

1st | 2nd | 3d |
---|---|---|

up? | charm | top |

down? | strange? | bottom |

**hadron** (bound states of the above quarks)

**minimally extended supersymmetric standard model**

bosinos:

**dark matter candidates**

**Exotica**

In quantum chromodynamics, in fact already in pure SU(3) Yang-Mills theory, a *glueball* is a bound state of (just) gluons (a kind of confinement).

Glueballs are hard to detect in experiment but their existence is confirmed by lattice QCD, also by the AdS-QCD correspondence (see there). According to Greensite 11, section 8.5:

The caloron idea is probably the most promising current version of monopole confinement in pure non-abelian gauge theories, but it is basically (in certain gauges) a superposition of monopoles with spherically symmetric abelian fields, and this leads to the same questions raised in connection with monopole Coulomb gases.

- Jeff Greensite,
*An Introduction to the Confinement Problem*, Lecture Notes in Physics, Volume 821, 2011 (doi:10.1007/978-3-642-14382-3)

See also

- Wikipedia,
*Glueball*

Created on December 3, 2018 at 08:44:56. See the history of this page for a list of all contributions to it.