Hard π0 and η production in S+Au nuclear collisions at SPS energies and possible signature of quark-gluon plasma

被引：1

作者：

Tarasov, YA ^{[1
]}

机构：

[1] IV Kurchatov Atom Energy Inst, Russian Res Ctr, Moscow 123182, Russia

来源：

PHYSICS LETTERS B | 1998年 / 441卷 / 1-4期

关键词：

quark-gluon plasma; phase transition; pi(0) and eta production; resonances; hydrodynamical model;

D O I：

10.1016/S0370-2693(98)01118-6

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Hard pi(0) and eta production is investigated in Landau and Bjorken hydrodynamical models taking into account great number of hadronic resonances (16 and 42) in hadronic phase. We consider two different scenario: with quark-gluon plasma (QGP) formation and with only hadronic gas one without QGP. The Cronin effect and hard direct pions emission are taken into account. It is shown that these two scenario give similar p(perpendicular to) spectra which agrees with experimental data obtained by WA80 collaboration. Therefore we conclude that from hadronic spectra it is difficult to extract the proof of QGP formation. However we calculate also the eta/pi(0) ratio. We show that this value agrees with experiment only for scenario with;QGP and phase transition to hadrons. The hadronic gas scenario without QGP disagrees with experimental data. (C) 1998 Elsevier Science B.V. All rights reserved.

引用

页码：453 / 460

页数：8

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