12 November 2012 Last updated at 13:30 GMT
Popular physics theory running out of hiding places
By Pallab Ghosh
Science correspondent, BBC News
Researchers at the Large Hadron Collider have detected one of the rarest particle decays seen in Nature.
The finding deals a significant blow to the theory of physics known as supersymmetry.
Supersymmetry, or SUSY, has gained popularity as a way to explain some of the inconsistencies in the traditional theory of subatomic physics known as the Standard Model.
The new observation, reported at the Hadron Collider Physics conference in Kyoto, is not consistent with many of the most likely models of SUSY.
Read more: http://www.bbc.co.uk/news/science-environment-20300100