Abstract
One of the main physics goals of the Multi Purpose Detector (MPD) is to investigate hot and dense baryonic matter in heavy ion collisions at NICA energies to search for the possible critical end point (CEP). Since the location of CEP is not clear the entire accessible region of the QCD phase diagram needs to be explored by scanning the full range of available beam energies. In case of CEP existence it can be observed by abnormal fluctuations of various quantities such as net-proton multiplicity. This task requires excellent particle identification (PID) capability over as large as possible phase space volume. The identification of charged hadrons is achieved at the momenta of 0:1 – 3 GeV/c. The results of hadron identification and preliminary possibility estimation of the study of event-by-event fluctuations at MPD will be presented.
Highlights
The main scientific goal of the NICA/Multi Purpose Detector (MPD) project is to explore the phase diagram of strongly interacting matter in the region of highly dense and hot baryonic matter [1]
The identification of charged hadrons is achieved by time-of flight (TOF) measurements which are complemented by the energy loss information from TPC
There is a TPC-TOF mismatch effect which is significant in the low momenta region
Summary
The main scientific goal of the NICA/MPD project is to explore the phase diagram of strongly interacting matter in the region of highly dense and hot baryonic matter [1]. The search for the possible critical end point [2] in the QGP diagram requires excellent particle identification capability over as large as possible phase space volume. The identification of charged hadrons is achieved by time-of flight (TOF) measurements which are complemented by the energy loss (dE/dx) information from TPC. TPC is the main MPD tracking detector of the central barrel. Together with the time of flight system it provides momentum measurements with sufficient resolution (2-3%), vertex determination, two track separation, dE/dx measurements and particle identification at pseudorapidity region |η| < 1.6. A new approach based on the full simulation of the detector physics and response is required in order to get realistic estimations of the MPD performance instead of a simplified approach at the smeared hit production level.
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