University of Wisconsin-Madison Physical Sciences Lab

LHC Finds a New Particle

Wednesday, July 11th, 2012

The Large Hadron Collider, using the Atlas and CMS detectors, has discovered a new particle that physicists say could be the Higgs Boson, the particle that gives all other particles mass. The Higgs boson is the missing piece of Standard Model of physics, which explains how the universe works. Using data provided by the Atlas and CMS detectors, physicists at CERN have found a new particle at 125 GeV/c2, which is where the Higgs boson is expected. They have achieved 4.9 Sigma, which means there is a one in 2 million chance that what they have found is noise.

PSL is a major contributor to the Compact Muon Solenoid (CMS) detector. PSL designed the endcaps of CMS, as well as oversaw their assembly. PSL’s work on CMS is ongoing, with a number of parts currently in the shop for planned upgrades.

Following are stories regarding the discovery of the particle:

The Guardian

CS Monitor

UW News Service

On Wisconsin magazine, featuring a picture of PSL Engineer Dan Wenman