System size dependence of the non-monotonous pion freeze-out volume excitation function

• Authors: Qingfeng Li , Caiwan Shen , Marcus Bleicher
• Languages of publication: EN

Abstracts

EN

Hanburry-Brown-Twiss (HBT) correlation functions and radii of negatively charged pions from C+C, Si+Si, Cu+Cu, and In+In at lower RHIC/SPS energies are calculated with the UrQMD transport model and the CRAB analyzing program. We find a minimum in the excitation function of the pion freeze-out volume at low transverse momenta and around E
lab ∼ 20–30AGeV which can be related to the change from initial string emission to bulk emission from the created resonance matter. For small systems, we predict a local minimum in the excitation function of the HBT (freeze-out) volume which is explained by the competition of two mechanisms of the particle production, namely resonance decays and string formation/fragmentation.

Keywords

EN

HBT correlation; phase transition to QGP; system-size dependence; equation of state

• Publisher: De Gruyter Open
• Journal: Open Physics
• Year: 2012
• Volume: 10
• Issue: 5
• Pages: 1131-1136

Dates

published

1 - 10 - 2012

online

21 - 11 - 2012

Contributors

author

Qingfeng Li

• School of Science, Huzhou Teachers College, Huzhou, 313000, People’s Republic of China

author

Caiwan Shen

• School of Science, Huzhou Teachers College, Huzhou, 313000, People’s Republic of China

author

Marcus Bleicher

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Identifiers

DOI

10.2478/s11534-012-0093-0