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LHC physics data taking gets underway at new record collision energy of 8TeV

Date:
April 5, 2012
Source:
CERN
Summary:
At 00:38 CEST this morning, the LHC shift crew declared ‘stable beams’ as two 4 TeV proton beams were brought into collision at the LHC’s four interaction points. This signals the start of physics data taking by the LHC experiments for 2012. The collision energy of 8 TeV is a new world record, and increases the machine’s discovery potential considerably.

Screen Shot 2012-04-05 at 01.06.24.
Credit: Image courtesy of CERN

At 00:38 CEST this morning, the LHC shift crew declared 'stable beams' as two 4 TeV proton beams were brought into collision at the LHC's four interaction points. This signals the start of physics data taking by the LHC experiments for 2012. The collision energy of 8 TeV is a new world record, and increases the machine's discovery potential considerably.

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"The experience of two good years of running at 3.5 TeV per beam gave us the confidence to increase the energy for this year without any significant risk to the machine," explained CERN[1]'s Director for Accelerators and Technology, Steve Myers. "Now it's over to the experiments to make the best of the increased discovery potential we're delivering them!"

Although the increase in collision energy is relatively modest, it translates to an increased discovery potential that can be several times higher for certain hypothetical particles. Some such particles, for example those predicted by supersymmetry, would be produced much more copiously at the higher energy. Supersymmetry is a theory in particle physics that goes beyond the current Standard Model, and could account for the dark matter of the Universe.

Standard Model Higgs particles, if they exist, will also be produced more copiously at 8 TeV than at 7 TeV, but background processes that mimic the Higgs signal will also increase. That means that the full year's running will still be necessary to convert the tantalising hints seen in 2011 into a discovery, or to rule out the Standard Model Higgs particle altogether.

"The increase in energy is all about maximising the discovery potential of the LHC," said CERN Research Director Sergio Bertolucci. "And in that respect, 2012 looks set to be a vintage year for particle physics."

The LHC is now scheduled to run until the end of 2012, when it will go into its first long shutdown in preparation for running at an energy of 6.5 TeV per beam as of late 2014, with the ultimate goal of ramping up to the full design energy of 7 TeV.


Story Source:

The above story is based on materials provided by CERN. Note: Materials may be edited for content and length.


Cite This Page:

CERN. "LHC physics data taking gets underway at new record collision energy of 8TeV." ScienceDaily. ScienceDaily, 5 April 2012. <www.sciencedaily.com/releases/2012/04/120405131342.htm>.
CERN. (2012, April 5). LHC physics data taking gets underway at new record collision energy of 8TeV. ScienceDaily. Retrieved October 31, 2014 from www.sciencedaily.com/releases/2012/04/120405131342.htm
CERN. "LHC physics data taking gets underway at new record collision energy of 8TeV." ScienceDaily. www.sciencedaily.com/releases/2012/04/120405131342.htm (accessed October 31, 2014).

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