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SUMMARY:NA61/SHINE experiment at CERN SPS: Recent results\, current status
  and perspectives
DTSTART;VALUE=DATE-TIME:20181025T123000Z
DTEND;VALUE=DATE-TIME:20181025T130000Z
DTSTAMP;VALUE=DATE-TIME:20260517T203529Z
UID:indico-contribution-1304@cern.ch
DESCRIPTION:Speakers: Janusz Brzychczyk (Jagiellonian University)\nNA61/SH
 INE is a fixed-target experiment at the CERN Super-Proton-Synchrotron (SPS
 ) measuring the hadron production in hadron-nucleus and nucleus-nucleus co
 llisions with a large acceptance detector system. The measurements perform
 ed for a wide range of reactions provide valuable data for studying proper
 ties of hadronic matter under extreme conditions. They also provide precis
 e results on hadron production for determining the neutrino flux in long-b
 aseline neutrino experiments and for more reliable simulations of cosmic-r
 ay showers.\n\n   The primary aim of the experiment is the investigation o
 f the transition from hadron gas to quark-gluon plasma and the search for 
 associated critical point. A broad region of the phase diagram is probed b
 y varying energy and size of the collision system (from p+p to Pb+Pb at be
 am momenta 13A – 150 /158A GeV/c). Various observables\, e.g. quantities
  measuring event-to-event fluctuations of the particle multiplicity\, whic
 h are expected to reveal the occurrence of phase transition or critical be
 havior are examined. The observed non-monotonic pattern in the excitation 
 function of the K+/π+ ratio in NA49 Pb+Pb reactions has been interpreted 
 as the onset of deconfinement. This ratio is currently studied in p+p\, Be
 +Be and Ar+Sc collisions by NA61/SHINE.\n\nAnalysis of the system-size dep
 endence of hadron production properties has shown a distinct qualitative c
 hange in passing from p+p and Be+Be to Ar+Sc system\, which indicates a th
 reshold for formation of large clusters of strongly interacting matter - t
 he onset of fireball.\n\nRecently\, the experimental program was extended 
 by measurements of production properties of open charm mesons that are exp
 ected to provide a better insight into the phase transition behavior of ha
 dronic matter. For this purpose\, the NA61/SHINE spectrometer was suppleme
 nted with a Vertex Detector\, which allowed identification of $D^0$ mesons
  in the first test measurements performed for Pb+Pb collisions at 150A GeV
 /c.\n\nThis talk will present the recent experimental results and the phys
 ics program for future measurements beyond 2020\, after the Long Shutdown 
 2 of the CERN accelerators\, as well as the planned upgrade of the NA61/SH
 INE facility.\n\nhttps://indico.particle.mephi.ru/event/22/contributions/1
 304/
LOCATION:Hotel Intourist Kolomenskoye 4* Alekseevskiy hall
URL:https://indico.particle.mephi.ru/event/22/contributions/1304/
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