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[1207.2392] CMS Collaboration : Measurement of the underlying event activity in pp collisions at sqrt(s) = 0.9 a... http://t.co/AtIm9EZ1
[1207.2392] CMS Collaboration : Measurement of the underlying event activity in pp collisions at sqrt(s) = 0.9 a... http://t.co/AtIm9EZ1