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Showing posts with label standard model. Show all posts
Showing posts with label standard model. Show all posts

Wednesday, July 4, 2012

Clear signs of a new particle, at the level of 5 sigma, in the mass region around 126 GeV

At a seminar held at CERN today as a curtain raiser to the year’s major particle physics conference, ICHEP2012 in Melbourne, the ATLAS and CMS experiments presented their latest preliminary results in the search for the long sought Higgs particle. Both experiments observe a new particle in the mass region around 125-126 GeV.

A typical candidate event including two high-energy photons whose energy (depicted by dashed yellow lines and red towers) is measured in the CMS electromagnetic calorimeter. The yellow lines are the measured tracks of other particles produced in the collision. Credit: Thomas McCauley, Lucas Taylor / CERN