Bonn 2020 – scientific programme
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HK: Fachverband Physik der Hadronen und Kerne
HK 15: Heavy-Ion Collisions and QCD Phases III
HK 15.4: Talk
Tuesday, March 31, 2020, 18:00–18:15, J-HS F
Ξc0 reconstruction in pp collisions with ALICE — •jianhui zhu for the ALICE collaboration — GSI Helmholtzzentrum für Schwerionenforschung GmbH
The high collision energies available at the LHC allow for an abundant production of heavy quarks (charm and beauty), which are sensitive probes for investigating the properties of the Quark-Gluon Plasma (QGP) formed in high-energy heavy-ion collisions. Due to their large masses, they are produced in initial hard parton scattering processes on a timescale shorter than the QGP formation time and experience the whole system evolution. There have been extensive researches regarding the production of charm mesons in order to investigate the interactions of charm quarks with the QGP constituents and the transport properties of the medium. The measurement of charm-baryon production, and in particular the baryon-to-meson ratios, provides unique information on hadronisation mechanisms, constraining the role of coalescence and testing the universality of the fragmentation function.
Measurements of charm-baryon production in pp collisions are important to set up a benchmark for Pb-Pb collisions and provide essential tests of pQCD calculations and models of charm hadronisation process. In this presentation, the pT differential cross section times branching ratio of the Ξc0 baryon measured in the decay channel Ξc0 → e Ξ ν and the status of the Ξc0 baryon reconstruction via the hadronic decay channel Ξc0 → π+ Ξ− (and its charge conjugate) in pp collisions using Kalman Filter (KF) Particle package combined with machine learning technique will be reported.