# The Tsallis function and its applications

Europe/Zurich
40-S2-B01 - Salle Bohr (CERN)

### 40-S2-B01 - Salle Bohr

#### CERN

100
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 Description The Tsallis distribution was introduced in 1988 by Constantin Tsallis and has been used in many fields of physics. It has been widely used in high energy physics by the large experimental collaborations (PHENIX, STAR, ALICE, ATLAS, CMS, ...) mainly to describe transverse momentum distributions. Despite this, it has not received much attention from the theoretical high energy physics community. In this talk we will present a short review of the Tsallis distribution focusing on the use in high energy physics. A proposal will be considered to bring consistency to the values of the Tsallis parameter q and the corresponding temperature T. Organised by Y. Foka, U. Wiedemann
• 09:00 09:30
The Tsallis Distribution at the LHC 30m
Abstract: The Tsallis distribution was introduced in 1988 by Constantin Tsallis and has been used in many fields of physics. It has been widely used in high energy physics by the large experimental collaborations (PHENIX, STAR, ALICE, ATLAS, CMS, ...) mainly to describe transverse momentum distributions. Despite this, it has not received much attention from the theoretical high energy physics community. In this talk we will present a short review of the Tsallis distribution focusing on the use in high energy physics. A proposal will be considered to bring consistency to the values of the Tsallis parameter $q$ and the corresponding temperature $T$.
Speaker: Prof. Jean Cleymans
• 09:30 09:45
Tsallis fitting of the CMS data 15m
In CMS, the spectra of charged or identified hadrons were fit by a Tsallis function, which empirically describes both the low-pt exponential and the high-pt power-law behaviours. The success of this parametrization will be demonstrated through various examples.
Speaker: Dr. Ferenc Sikler
• 09:45 10:00
Fitting PHENIX identified hadron production spectra to Tsallis function in p+p and d+Au collisions at 200 GeV 15m
PHENIX has measured production spectra for a large collection of identified hadrons in p+p and d+Au collisions at 200 GeV. We demonstrate that all production spectra can be well fit to Tsallis distribution in the whole range of measurements. We also present analysis of fit parameters in dependence on particle mass.
Speaker: Victor Riabov
• 10:00 10:15
Power law tail from the low energy perspective 15m
Speaker: Dr. Marek Gazdzicki