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
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
收藏
页码:365 / 369
页数:4
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