# The Ways of Four-Quark Hadrons

- Institution: CERN
- Department: EP Seminar
- Speaker: Antonio Polosa
- Year: 2014
- Language: English
- Source: [CERN](https://videos.cern.ch/record/3013414)
- Licence: [CERN](http://copyright.web.cern.ch)
- Who can watch: Teens profiles and older (sources give no ratings; placed by Invisible Network from the source's own words)

Ten years after the discovery of the X(3872) we can assert that a number of exotic four-quark hadrons with hidden charm and beauty have been discovered, the most recent, Z(3900), found by BES in 2013, being among the top-striking ones.

However, ten years have not been enough to dispel the controversy about their inner structure, with two body hadron molecules and compact multiquark states being the withstanding antipodal models.

In this seminar I will review the status of the field, presenting both the experimental facts and the theoretical pictures attempting to interpret them..

0:00:00 Slide 1

0:01:28 Slide 2

0:02:04 Slide 3

0:04:02 Slide 4

0:04:18 Slide 5

0:05:15 Slide 6

0:05:51 Slide 7

0:07:17 Slide 8

0:07:46 Slide 9

0:07:51 Slide 10

0:08:03 Slide 11

0:08:15 Slide 12

0:08:32 Slide 13

0:09:28 Slide 14

0:09:51 Slide 15

0:10:14 Slide 16

0:12:27 Slide 17

0:12:52 Slide 18

0:14:05 Slide 19

0:16:04 Slide 20

0:16:54 Slide 21

0:17:04 Slide 22

0:17:39 Slide 23

0:17:45 Slide 24

0:18:25 Slide 25

0:18:32 Slide 26

0:19:10 Slide 27

0:19:34 Slide 28

0:20:47 Slide 29

0:21:33 Slide 30

0:22:09 Slide 31

0:22:35 Slide 32

0:22:51 Slide 33

0:24:10 Slide 34

0:25:27 Slide 35

0:27:48 Slide 36

0:29:09 Slide 37

0:30:05 Slide 38

0:30:10 Slide 39

0:31:06 Slide 40

0:32:30 Slide 41

0:32:52 Slide 42

0:33:49 Slide 43

0:34:25 Slide 44

0:35:17 Slide 45

0:35:36 Slide 46

0:36:26 Slide 47

0:38:17 Slide 48

0:39:38 Slide 49

0:41:47 Slide 50

0:42:38 Slide 51

0:45:18 Slide 52

0:47:33 Slide 53

0:49:38 Slide 54

0:52:26 Slide 55

0:52:36 Slide 56

0:53:05 Slide 57

0:54:55 Slide 58

0:56:47 Slide 59

0:57:12 Slide 60

1:00:16 Slide 61

1:01:03 Slide 62

## Lectures

1. [The Ways of Four-Quark Hadrons](https://invisiblenetwork.ai/learn/cern/3013414/6253b28edb08), 1 h 13 min (CERN's player)