Fast Simulation of TOF ResponseA.Galoyan,

LPP, JINR, Dubna

Used modelUsed model

L.D.Landau, E.M.Lifshitz, “Field theory”, 1962L.D.Landau, E.M.Lifshitz, “Field theory”, 1962

Mass resolution of Mass resolution of ππ, , KK, P, P

ππ KK PP

0.20.2

0.20.2

1.01.0

0.40.4

0.40.4 0.60.6

0.60.6 0.80.8

0.80.8

1.21.2

1.21.2

1.01.0

Nuclear Instruments and Methods in Physics Research A 433 (1999) 542}553Review of particle identification by time of flight techniquesW. Klempt

Nuclear Instruments and Methods in Physics Research A 433 (1999) 542}553Review of particle identification by time of flight techniquesW. Klempt

J. Phys. G: Nucl. Part. Phys. 30 (2004) S119–S128Strangeness from 20AGeV to 158AGeVVolker Friese (for the NA49 Collaboration)Particle identification is achieved by the measurements of the specific energy loss dE/dx(resolution ≈4%) in the TPCs and the time-of-flight (resolution ≈60 ps) with the scintillatorwalls.Depending on their momentum, charged kaons were identified by TOF, combined TOF and dE/dx or dE/dx alone, as figure 1 illustrates. GEANT calculations were used to correct the raw yields for geometrical acceptance, in-flight decay and the efficiency of the time-of-flight system.

PHYSICAL REVIEW C 69, 024902 (2004)Energy and centrality dependence of deuteron and proton production in Pb+Pb collisions at relativistic energiesT. Anticic, et al/ NA49 Collaboration

Physics Letters B 486 2000 22–28Deuteron production in central PbqPb collisions at 158A GeVNA49 CollaborationS.V. Afanasiev et al.

The overall time resolution is about 60–70 ps. The particle identification capability in the experiment is shown in Fig. 1a, where the dErdx value measured in the Main TPCis plotted against the particle mass squared m2 derived from the TOF information. Whereas deuterons would be completely overshadowed by kaons and protons in the dErdx projection, they can be cleanlyseparated on the basis of the TOF information.