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Data Analysis Practice looking for Φ(1020)

Data Analysis Practice looking for Φ(1020). 2006. 12. 12 Nuclear Physics Ⅲ Kyung-Eon,Choi. Contents. NA49 detector Φ(1020) study Data Set Analysis strategy Analysis procedure Find Φ peak Others. NA49 Detector Setup. Main TPC. Vertex TPC2. Vertex TPC 1. Beam. Φ (1020).

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Data Analysis Practice looking for Φ(1020)

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  1. Data Analysis Practicelooking for Φ(1020) 2006. 12. 12 Nuclear Physics Ⅲ Kyung-Eon,Choi

  2. Contents • NA49 detector • Φ(1020) study • Data Set • Analysis strategy • Analysis procedure • Find Φ peak • Others..

  3. NA49 Detector Setup Main TPC Vertex TPC2 Vertex TPC 1 Beam

  4. Φ (1020) • Mass m = 1019.456 +- 0.020 MeV • Full width Γ = 4.26 +- 0.05 MeV < Decay mode > K+K- (49.1 +- 0.6 %) (34.0 +- 0.5 %) My Way ~!!

  5. Data Set • Run Type • 01I : Pb+Pb 160 AGeV central 256 TB • Event • Total event : 2,968,504 • Used event : • Track • Accepted Track :

  6. Analysis Strategy

  7. dEdx - p - m Histogram

  8. dEdx - p - m (kaon cut)

  9. dEdx - p - m (proton cut)

  10. dEdx - p

  11. Slice

  12. dEdx - fit

  13. Cuts • EventCut • Vertex X & Y: -1 ~ 1 cm • Vertex Z : -582 ~ -580 cm • Multiplicity : 700 ~ 1500 • K+ Cut (PosParticleList) • Charge : 1 • Bx (impact parameter) : -5~5 cm • By : -2 ~2 cm • Momentum Range : 3<p<100 • Mass2 : 0.12 < m2 < 0.36 • SetDedxSigma : 0.9 ~ 1.03 • K- Cut (NegParticleList) • Charge : -1 • Bx (impact parameter) : -5~5 cm • By : -2 ~2 cm • Momentum Range : 3<p<100 • Mass2 : 0.12 < m2 < 0.36 • SetDedxSigma : 0.9 ~ 1.03 I don’t need PID..

  14. Event Cut

  15. Track Cut

  16. Result

  17. Compare with yoo’s result

  18. Another interest ~!! Kaon(Strangeness) Suppression?? or Strangeness Enhancement??

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