论文信息 - Global baryon number conservation encoded in net-proton ﬂuctuations measured in Pb–Pb collisions at

Global baryon number conservation encoded in net-proton ﬂuctuations measured in Pb–Pb collisions at

Experimental results are presented on event-by-event net-proton ﬂuctuation measurements in Pb–Pb collisions at √ s NN = 2 . 76 TeV, recorded by the ALICE detector at the CERN LHC. These measurements have as their ultimate goal an experimental test of Lattice QCD (LQCD) predictions on second and higher order cumulants of net-baryon distributions to search for critical behavior near the QCD phase boundary. Before confronting them with LQCD predictions, account has to be taken of correlations stemming from baryon number conservation as well as ﬂuctuations of participating nucleons. Both effects inﬂuence the experimental measurements and are usually not considered in theoretical calculations. For the ﬁrst time, it is shown that event-by-event baryon number conservation leads to subtle long-range correlations arising from very early interactions in the collisions. Research. This is an open access article the SCOAP 3

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