On the possibility of q-scaling in high-energy production processes

Abstract

Listen

Translate article

It has recently been noted that transverse momenta (pT) distributions observed in high-energy production processes exhibit remarkably universal scaling behaviour. This is the case when a suitable variable replaces the usual pT. On the other hand, it is also widely known that transverse momentum distributions in general follow a power-like Tsallis distribution, rather than an exponential Boltzmann–Gibbs one, with a (generally energy dependent) nonextensivity parameter q. Here we show that it is possible to choose a suitable variable such that all the data can be fitted by the same Tsallis distribution (with the same, energy-independent value of the q-parameter). They thus exhibit q-scaling.