LHCb experiment. Roͬͬ͠͠͡͠͠͠͠͠͠͠͠sͬͬ͠͠͠͠͠͠͠͠͠aͬͬ͠͠͠͠͠͠͠ Menkman/Flickr March 3, 2021 Cern: scientists discover four new particles – here’s why they matter Patrick Koppenburg, Dutch National Institute for Subatomic Physics and Harry Cliff, University of Cambridge The theory of tiny particles isn’t complete. But new discoveries are helping scientists expand it.