1 Grażyna Nowak Strangeness Production in DIS at HERA DIS2009 Madrid 26-30.04.2009 Strangeness Production in DIS at HERA Grażyna Nowak IFJ PAN Krakow representing • HERA kinematics • Strange Particles (K 0 s , Λ) Production in ep Collisions Differential cross-sections asymmetry Ratios of differential cross sections (Λ /K 0 s ,K 0 s /h ± ) • Summary Collaboration
Strangeness Production in DIS at HERA. HERA kinematics. Strange Particles (K 0 s , Λ ) Production in ep Collisions. Differential cross-sections asymmetry Ratios of differential cross sections ( Λ /K 0 s ,K 0 s /h ± ). Summary. Grażyna Nowak IFJ PAN Krakow. - PowerPoint PPT Presentation
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Grażyna Nowak Strangeness Production in DIS at HERA DIS2009 Madrid 26-30.04.2009
Strangeness Production in DIS at
HERA
Grażyna Nowak
IFJ PAN Krakowrepresenting
• HERA kinematics
• Strange Particles (K0s, Λ) Production in ep Collisions
Differential cross-sections asymmetryRatios of differential cross sections (Λ /K0
s,K0s/h±)
• Summary
Collaboration
2
e±p kinematics at HERA
exchanged momentum (squared)
Bjorken scaling variable
inelasticity variable
hadronic final state mass
ep center of mass energy
Measurement:
Neutral Current (NC)
Deep Inelastic Scattering (DIS)
2 < Q2 < 100 GeV2
0.1 < y < 0.6
kinematics from scattered electron
HERA I data int. luminosity of ≈ 50 pb-1
non-perturbative hadronisation processleading to hadronic final state