1. General Seminars

# Tetraquarks, pentaquarks and dibaryons

## by Prof. Luciano Maiani (La Sapienza University)

Europe/Rome
Aula Bruno Touschek (LNF INFN)

### Aula Bruno Touschek

#### LNF INFN

Via Enrico Fermi, 40 00044 Frascati
Description
The discovery of two pentaquarks by LHCb has reinforced the case of “exotic’ hadrons, which have diquarks and antidiquarks as basic units. I review the cases studied until now, the so called XYZ states, the theoretical basis for this concept and the implications for the existence of further states, with baryon number equal two.