BEGIN:VCALENDAR VERSION:2.0 PRODID:-//CERN//INDICO//EN BEGIN:VEVENT SUMMARY:Tetraquarks\, pentaquarks and dibaryons DTSTART;VALUE=DATE-TIME:20151116T100000Z DTEND;VALUE=DATE-TIME:20151116T120000Z DTSTAMP;VALUE=DATE-TIME:20200129T120529Z DESCRIPTION:\n\nThe discovery of two pentaquarks by LHCb has reinforced th e case of “exotic’ hadrons\, which have diquarks and antidiquarks as b asic units. I review the cases studied until now\, the so called XYZ state s\, the theoretical basis for this concept and the implications for the ex istence of further states\, with baryon number equal two.\n\n\n\n\nhttps:/ / LOCATION:LNF INFN Aula Bruno Touschek URL: END:VEVENT END:VCALENDAR