Abstract
The NA61/SHINE experiment aims to discover the critical point of strongly interacting matter and study the properties of the onset of deconfinement. For these goals a scan of the two dimensional phase diagram ($T$-$\mu_{B}$) is being performed at the SPS by measurements of hadron production in proton-proton, proton-nucleus and nucleus-nucleus interactions as a function of collision energy and system size. In this contribution preliminary results on transverse momentum and multiplicity fluctuations expressed in terms of strongly intensive quantities from the Ar+Sc energy scan will be presented. These fluctuations are expected to be sensitive to the existence of a critical point. The results are compared with results from the p+p and Be+Be energy scan as well as with NA49 measurements.
Highlights
The NA61/SHINE experiment [1] is a multi-purpose fixed target experiment at the Super Proton Synchrotron (SPS) of the European Organization for Nuclear Research (CERN)
The strong interaction programme of NA61/SHINE consists of studies of the onset of deconfinement (OD) [2] in nucleus-nucleus collisions and search for the critical point (CP) [3] of strongly interacting matter
The analysis was preformed for inelastic p+p interactions at 20, 30, 40, 80 and 158 GeV/c beam momenta, as well as Be+Be and Ar+Sc collisions at 19, 30, 40, 75 and 150A GeV/c selected for the smallest 5% of forward energies
Summary
The NA61/SHINE experiment [1] is a multi-purpose fixed target experiment at the Super Proton Synchrotron (SPS) of the European Organization for Nuclear Research (CERN). The strong interaction programme of NA61/SHINE consists of studies of the onset of deconfinement (OD) [2] in nucleus-nucleus collisions and search for the critical point (CP) [3] of strongly interacting matter. NA61/SHINE performes measurements of hadron production in collisions of protons and various nuclei (p+p, Be+Be, Ar+Sc, Xe+La, Pb+Pb) at a range of beam momenta (13A - 158A GeV/c). It is expected that there will be a non-monotonic dependence of fluctuations of a number of observables in this scan due to the phase transition of strongly interacting matter. Template printed on September 28, 2017 and the possible existence of the CP [4]. Some hints of this enhancement were already observed by the NA49 experiment [5]
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