Simulations and feasibility studies of low mass vector mesons identification in CBM Jerzy Cibor 1 Rados ł aw Karabowicz 2 Zbigniew Majka 2 Pawe ł Staszel.

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Presentation transcript:

Simulations and feasibility studies of low mass vector mesons identification in CBM Jerzy Cibor 1 Rados ł aw Karabowicz 2 Zbigniew Majka 2 Pawe ł Staszel 2 Pawe ł Szostak 2 1.H. Niewodniczanski Institute Of Nuclear Physics, Krakow, Poland 2.M. Smoluchowski Institute Of Physics, Jagiellonian University, Krakow, Poland

Organization of the software UrQMD central after 40 fm/c Pluto fireball Geant Standard G4CBM setup: -magnet (zero field) -target 2x2 cm 2 x 300 m -carbon pipe, 0.5 mm thick -7 STStations, 100 m thick background (9000 events) -particle multiplicities -rapidity and anisotropy distributions signal (10 6 events) RESULTS Jerzy Cibor, IFJ Krakow CBM meeting, GSI Darmstadt

UrQMD particle multiplicities and distributions Particle multiplicities: N ALL = 1582 N CH = 944 N p = 161 N pbar = N + = 338 N - = 369 N K+ = 42.4 N K- = 13.6 N = 37.4 Jerzy Cibor, IFJ Krakow CBM meeting, GSI Darmstadt y ptpt

UrQMD hit densities in STS Jerzy Cibor, IFJ Krakow CBM meeting, GSI Darmstadt

Signal from Pluto Jerzy Cibor, IFJ Krakow CBM meeting, GSI Darmstadt after Geant

UrQMD + Geant vertices distribution Jerzy Cibor, IFJ Krakow CBM meeting, GSI Darmstadt

Background from UrQMD and cuts applied Jerzy Cibor, IFJ Krakow CBM meeting, GSI Darmstadt dN e+e- /dM e+e-

Latest results of combinatorial background subtraction Jerzy Cibor, IFJ Krakow CBM meeting, GSI Darmstadt dN e+e- /dM e+e-

Future plans - more statistics (?) - investigation and optimization of different cuts - magnetic field + tracking - realistic detector – efficiencies, misidentifications - next results will be presented in Warsaw Jerzy Cibor, IFJ Krakow CBM meeting, GSI Darmstadt