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

• Autorzy: Qingfeng Li , Caiwan Shen , Marcus Bleicher
• Języki publikacji: EN

Abstrakty

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.

Słowa kluczowe

EN

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

• Czasopismo: Open Physics
• Rocznik: 2012
• Tom: 10
• Numer: 5
• Strony: 1131-1136

Daty

wydano

2012-10-01

online

2012-11-21

Twórcy

autor

Qingfeng Li

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

autor

Caiwan Shen

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

autor

Marcus Bleicher

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Identyfikatory

DOI

10.2478/s11534-012-0093-0