Non-extensive Statistical Approach to Fragmentation

Not scheduled
Théâtre National (Centre Bonlieu)

Théâtre National

Centre Bonlieu

France
Board: 6
Poster Jets

Speaker

Karoly Uermoessy (Dept. for Theor. Phys., ELTE; Research Institute for Particle and Nuclear Physics (KFKI))

Description

The first part of this talk presents a possible statistical physical description of hadron production in electron-positron collisions. The main idea of the model is that hadrons produced inside a jet may be considered as a microcanonical ensemble, with multiplicity fluctuating event by event. The obtained hadron spectrum is in good agreement with measured fragmentation functions [1]. Furthermore, at low energies, the above hadron spectrum coincides with the Tsallis distribution, which gives good fittings to hadron spectra stemming from proton-proton and nucleus-nucleus collisions. In the second part of the talk, I provide mathematical proof for the energence of the Tsallis distribution in systems with special interactions, and present results of a parton collision cascade simulation based on these interactions [2]. [1] Karoly Urmossy, Gergely Gabor Barnafoldi, Tamas Sandor Biro, Generalised Tsallis Statistics in Electron-Positron Collisions arXiv:1101.3023 (Submitted to PLB) [2] Karoly Urmossy, Tamas S. Biro, Gergely G. Barnaföldi Pion Production Via Resonance Decay in a Non-extensive Quark-Gluon Medium with Non-additive Energy Composition Rule arXiv:1101.3522 (Proceedings of Hot and Cold Baryonic Matter 2010)

Primary author

Karoly Uermoessy (Dept. for Theor. Phys., ELTE; Research Institute for Particle and Nuclear Physics (KFKI))

Co-authors

Dr Gergely Gabor Barnafoldi (Research Institute for Particle and Nuclear Physics (KFKI)) Prof. Tamas Sandor Biro (Research Institute for Particle and Nuclear Physics (KFKI))

Presentation materials

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