On event-by-event fluctuations in nuclear collisions

被引：0

作者：

Marek Gaździcki

Andrei Leonidov

Gunther Roland

机构：

[1] Institut für Kernphysik,

[2] Universität Frankfurt,undefined

[3] August-Euler Str. 6,undefined

[4] D-60486 Frankfurt/M,undefined

[5] Germany ,undefined

[6] P.N. Lebedev Physics Institute,undefined

[7] 117924 Leninsky pr. 53,undefined

[8] Moscow,undefined

[9] Russia ,undefined

来源：

The European Physical Journal C - Particles and Fields | 1999年 / 6卷 / 2期

关键词：

Random Walk; Transverse Momentum; Preliminary Data; Quantitative Determination; Momentum Distribution;

D O I：

10.1007/PL00021663

中图分类号：

学科分类号：

摘要：

We demonstrate that a new type of analysis in heavy-ion collisions, based on an event-by-event analysis of the transverse momentum distribution, allows us to obtain information on secondary interactions and collective behaviour that is not available from the inclusive spectra. Using a random walk model as a simple phenomenological description of initial state scattering in collisions with heavy nuclei, we show that the event-by-event measurement allows a quantitative determination of this effect, well within the resolution achievable with the new generation of large acceptance hadron spectrometers. The preliminary data of the NA49 collaboration on transverse momentum fluctuations indicate qualitatively different behaviour than that obtained within the random walk model. The results are discussed in relation to the thermodynamic and hydrodynamic description of nuclear collisions.

引用

页码：365 / 369

页数：4

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