In 2004, Spiropulu moved to CERN as a research scientist with the CMS experiment.
U.S. physicists and graduate students participating in the CMS experiment at CERN's Large Hadron Collider.
Dr Tom Whyntie is a Research Assistant on the CMS experiment at Imperial College London.
An image released by Cern today of a collision detected by the CMS experiment, showing characteristics expected from the decay of a Higgs boson.
Guido Tonelli, in charge of the CMS experiment, says: "We are discussing the last chapter, we hope, of a story that has lasted 47 years.
Oliver Buchmueller, a physicist on the CMS experiment, said: "We see a small bump around the same mass as the Atlas team and that is intriguing.
The goal of CMS experiment is to investigate a wide range of physics, including the search for the Higgs boson, extra dimensions, and particles that could make up dark matter.
The group is the largest from any university in the U.S. to participate in the CMS experiment.
In 2011 he was elected to be the spokesperson for the CMS experiment.
However, there is a common practical difficulty in carrying out CMS experiments, which are labor intensive, demanding of space, and of long duration.