CERN-LHC.Measurement of the ratio of antiprotons to protons in proton-proton collisions at centre-of-mass energies og 0.9 and 7 TeV covering the PT range from 0.45 to 1.05 GeV and abs(rapidity) < 0.5. The data were taken during December 2009 with 2.8 million collisions at 0.7 TeV and from March-April 2010 with 4.2 million collisions at 7 TeV. Numerical values supplied by P. Christakoglou.
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