4-8 July 2016
Kramer Law building
Africa/Johannesburg timezone
The Proceedings of SAIP2016 published on 24 December 2017
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Thermal Model Description of Collisions of Small Systems

Presented by Prof. Jean CLEYMANS on 6 Jul 2016 from 10:00 to 10:20
Type: Oral Presentation
Track: Track B - Nuclear, Particle and Radiation Physics


Recently, two experimental observations have attracted high interest: 1. The maxima in the excitation function of the K+/pi+ and Lambda/pi+ ratios around sqrt(sNN) = 8 GeV, while no maximum is seen in the K-/pi- ratio. 2. A continuous evolution of the ratios (multi-)strange-over-pi as a function of the multiplicity in pp, p-Pb and Pb-Pb collisions at LHC energies. Prediction within the thermal-statistical model of particle ratios from the lowest up to LHC energies and from pp up to central heavy-ion collisions will be given. It will be shown why maxima occur, how they evolve when studying smaller systems (E.g. the maximum of the K+/pi+ ratio will hardly be visible in pp, while the maximum in the Lambda/pi ratio is expected to remain also in pp). Using the strangeness canonical ensemble, the key parameter is the strangeness correlation volume. It turns out that this quantity also plays a dominating role in describing the variation of the particle ratios from pp to Pb-Pb collisions at LHC energies.










Location: Kramer Law building
Address: UCT Middle Campus Cape Town
Room: 4A

Primary authors



  • Prof. Krzysztof REDLICH Institute of Theoretical Physics, University of Wroclaw, Pl-45204 Wroclaw, Poland; ExtreMe Matter Institute EMMI, GSI, D-64291 Darmstadt, Germany; Department of Physics, Duke University, Durham, NC 27708, USA}
  • Dr. Helmut OESCHLER University of Heidelberg, Germany
  • Dr. Natasha SHARMA Department of Physics, Panjab University, Chandigarh 160014, India
  • Dr. Boris HIPPOLYTE Institut Pluridisciplinaire Hubert Curien (IPHC), Universit\'e de Strasbourg, CNRS-IN2P3, Strasbourg, France