Wednesday, 6 July 2016

Physics prepares to feast on collider data, seeking dark universe

GENEVA: Scientists at Europe's physics research centre CERN are preparing to unwrap the biggest trove of data yet from the Large Hadron Collider (LHC), three years after they confirmed the existence of the elusive Higgs boson."In the life of accelerator physics there are few moments like the
one we are living through," said Tiziano Camporesi, leader of the CMS experiment at CERN.
"This is the time when the probability of finding something new is highest. "The Higgs boson, whose discovery secured the Nobel prize for physics in 2013, answered fundamental questions about how elementary matter attained mass. But it did not solve the riddle of what's missing from the "standard model" of physics. The standard model, an elegant ensemble of equations summarising everything known about nature, leaves some questions hanging, Camporesi told Reuters at CERN in Geneva.
One puzzle is why gravity doesn't seem to fit into the standard model. Another question is why there is far more matter in the universe that the 4 percent we can see.The LHC has never worked better, or harder. Billions of protons shoot around the 27-km underground ring before smashing into each other at an energy of 13 Tera electron Volts (TeV), or about 13 times the force of a flying mosquito. The intensity of the proton beams has been cranked up to a record, providing more data than ever.
CERN scientists count their huge volumes of data in "inverse femtobarns". They harvested 2.6 last year and have culled almost 8 already this year, Camporesi said. The big reveal will be at the International Conference on High Energy Physics in Chicago next month when CMS and its neighbour at CERN, the Atlas experiment, will show what they have found.

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