Scope: PWG
PWG-LF (Light Flavour Spectra)
Energy
2.76 TeV
System
Pb-Pb
Figure Group
Figure Image
Figure image (.eps)
Figure image (.pdf)
Figure Caption
Xi&pi Invariant mass distributions of unlike-sign pairs (black full circle) and Mixed Event Background pairs (blue open circle) for the Xi*0 signal extraction in Pb-Pb collisions in 0-10% centrality class. The distributions correspond to the pT range of the resonance 3.0-3.5 GeV/c.
Detail description
Keywords: Xi*0, Pb-Pb, invariant mass distribution, event-mixing
Data sample: LHC11h
Event selection :
- Pile-up rejection via SPD
- |V_{z}| < 10 cm
Track selection :
- transverse momentum range, \pt > 0.15 GeV/c
- pseudorapidity, \eta in [-0.8, 0.8]
- number of TPC crossed rows> 70
- \chisquare per TPC cluster < 4.0
- number of clusters in the SPD ≥ 1
- reconstructed pairs rapidity range -0.5 < y < 0.5.
PID cuts:
- Nsigma_TPC < 3