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HK: Fachverband Physik der Hadronen und Kerne

HK 25: Heavy-Ion Collisions and QCD Phases VI

HK 25.2: Vortrag

Mittwoch, 1. April 2020, 14:15–14:30, J-HS G

Relativistic kinetics of a BEC with inelastic processes — •Hendrik van Hees¹, Richard Lenkiewicz¹, Alex Meistrenko¹, Kai Zhou², Zhe Xu³ und Carsten Greiner¹ — ¹Institute for Theoretical Physics, Goethe University, Frankfurt/Main — ²Frankfurt Institute of Advanced Studies, Frankfurt/Main — ³Tsinghua University Beijing

Motivated by the Color Glass Condensate model for the early stages of ultrarelativistic heavy-ion collisions, we investigate the time evolution of a Bose Einstein Condensate (BEC), including both elastic 2 → 2 and inelastic (particle-number changing) 2 ↔ 3 processes. Employing a simple model with constant cross sections we solve the Boltzmann equation by numerically integrating the collision term, implementing the principle of detailed-balance. It is found that only for tiny inelastic cross sections in comparison to the elastic ones, σ₂₃/σ₂₂ ≪ 1, a transient BEC is formed for a short time, before the time evolution converges to the expected thermal equilibrium without a BEC [1].
Supported by DFG through CRC-TR 211.
[1] R. Lenkiewicz et al, Phys. Rev. D 100, 091501(R) (2019)