24-27 декабря 2012 5 Multiple pp-collisions per bunch crossing Научная сессия ученого совета ОФВЭ ПИЯФ Z  μμ from 2012 data with 25 reconstructed vertex (only tracks with pT>20 GeV and #Si hits >9 shown) The BIG challenge in 2012: PILE-UP Experiment's design value (expected to be reached at L=10 34 !) Z  μμ Peak interaction per bunch crossing 2011: =9 2012: =20 Mean # of interaction per crossing
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