Pentaquark

• Physicists discover family of tetraquarks (09 Jul 2016)
  
• After a half century, the exotic pentaquark particle is found (31 May 2016)
  
• LHCb claims discovery of two pentaquarks – Physics World (12 May 2016)
  
• Elusive New Pentaquark Particle Discovered After 50-Year Hunt (16 Jul 2015)