Cern: A milestone in the history of particle physics on the matter-antimatter imbalance

A CP-symmetry transformation swaps a particle with the mirror image of its antiparticle. The LHCb collaboration has observed a breakdown of this symmetry in the decays of the D0 meson (illustrated by the big sphere on the right) and its antimatter counterpart, the anti-D0 (big sphere on the left), into other particles (smaller spheres). The extent of the breakdown was deduced from the difference in the number of decays in each case (vertical bars, for illustration only) (Image: CERN)

This content is restricted to site members. If you are an existing user, please log in. New users may register below.

Existing Users Log In
   
New User Registration
*Required field

Welcome to Lobby Global.

Nothing but the truth for

a global citizen
Register

  • Sign up
Lost your password? Please enter your username or email address. You will receive a link to create a new password via email.
We do not share your personal details with anyone.