# Particle Zoo 2.0: New tetra- and pentaquarks at LHCb

- Institution: CERN
- Department: LHC Seminar
- Taught by: Elisabetta Spadaro Norella, Chen Chen
- Year: 2022
- Language: English
- Subjects: Physics
- Source: [CERN](https://videos.cern.ch/record/3018007)
- Licence: [CERN](http://copyright.web.cern.ch)
- Who can watch: Tweens profiles and older (sources give no ratings; placed by Invisible Network from the source's own words)

There has been significant interest over a number of years regarding the observation of new hadrons that do not fit the expected pattern of known mesons and baryons. This started with the observation of the charmonium-like $X(3872)$ resonance. In recent years over a dozen exotic states have been observed by LHCb, of which the pentaquark $P_c(4312)^+$, 4-charm-state $T_{cccc}(6900)$, the open charm X(2900) and the doubly charmed $T_{cc}(3875)^+$ are notable examples. In this seminar significant new pentaquark and tetraquark discoveries will be presented, in the analysis of various multi-body $B$ decays.

## Lectures

1. [Particle Zoo 2.0: New tetra- and pentaquarks at LHCb](https://invisiblenetwork.ai/learn/cern/3018007/48b1956666be), 1 h 2 min (CERN's player)