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Introduction

• Open heavy flavour allow studying the dynamical properties of QCD matter and degree of thermalization

D0 meson production

Full reconstruction of open charmed mesons

D0 -> K, pi

• c -> D0 O(50%) of cross-section
• BR : 3.93 +- 0.04%, D0 ct : 122.9 mu m

• direct clean probe: signal in invariant mass distribution
• difficulty : large combinatorial background especially in a high multiplicity environment
• mixed - event subtraction and/or vertex tracker needed

Deep Reconstructor