Possible Clues:

• European org. with a huge underground ring
• Lab housing the world's largest machine
• Big particle physics lab in Switz
• Org. with a bunch of particle accelerators
• Org. that operates the Large Hadron Collider
• Worry when study is neglected in research establishment
• Swiss research institute
• Acronym for the European Organization for Nuclear Research
• Particle physics laboratory based near Geneva
• European Organisation for Nuclear Research