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arXiv 0911.1902nucl-ex
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NA49和NA61/SHINE实验:结果和前景

NA49 and NA61/SHINE experiments: results and perspectives

Katarzyna Grebieszkow

摘要:

超级质子同步加速器(SPS)覆盖了QCD相图$(T - μ_B)$中最有趣的区域之一。一方面,有迹象表明,在低SPS能量下已经达到了去禁闭的能量阈值。另一方面,理论计算将QCD临界端点定位在SPS可获得的能量处。在本文中,NA 49签名的开始解除禁闭。结果上的π介子生产,K介子π介子比,横向质谱(“温度”)的斜率,和事件的事件粒子比波动与碰撞能量,中央$Pb+Pb$相互作用。接下来,我们展示了事件的平均横向动量和多重性波动的临界点的可能迹象。最后讨论了NA 61/SHINE实验的未来离子计划(轻离子能量扫描)。

英文摘要:

The Super Proton Synchrotron (SPS) covers one of the most interesting regions of the QCD phase diagram $(T - μ_B)$. On the one hand there are indications that the energy threshold for deconfinement is reached already at low SPS energies. On the other hand theoretical calculations locate the QCD critical end-point at energies accessible at the SPS. In this paper the NA49 signatures of the onset of deconfinement are presented. Results are shown on pion production, the kaon to pion ratio, slopes of transverse mass spectra ("temperature"), and event-by-event particle ratio fluctuations versus collision energy, for central $Pb+Pb$ interactions. Next we show possible indications of the critical point in event-by-event mean transverse momentum and multiplicity fluctuations. Finally we discuss the future ion program of the NA61/SHINE experiment (energy scan with light ions).

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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