arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1004.5582nucl-exhep-exhep-ph
收藏

在sqrt s_(NN)=9.2时Au+Au碰撞中带电强子的GeV谱

High-pT Spectra of Charged Hadrons in Au+Au Collisions at sqrt s_(NN)=9.2 GeV in STAR

M. V. Tokarev

摘要:

高$p_T$重离子碰撞中强子的产生为研究粒子形成机制和介质中组分能量损失提供了重要信息。这些信息是搜索临界点和相变特征所必需的。本文报道了STAR合作组在宽横动量$p_T=0.2-4.$ GeV/c和中等快度范围内测量了$\sqrt {s_{NN}}$ =9.2 GeV的Au+Au碰撞中带电强子的产生。它允许在这个能量的高$p_T$带电强子的光谱的第一次测量。该光谱表明了对中心性的依赖性,该依赖性随着$p_T$而增强。用$z$标度方法计算了组分能量损失及其与粒子横动量和碰撞中心度的关系。

英文摘要:

The production of hadrons in heavy ions collisions at high $p_T$ provides an important information on mechanism of particle formation and constituent energy loss in medium. Such information is needed for search of a Critical Point and signatures of phase transition. Measurements by the STAR Collaboration of charged hadron production in Au+Au collisions at $\sqrt {s_{NN}}$=9.2 GeV over a wide transverse momentum $p_T=0.2-4.$ GeV/c and at mid-rapidity range are reported. It allows for a first measurement of the spectra for charged hadrons at high $p_T$ at this energy. The spectra demonstrate the dependence on centrality which enhances with $p_T$. The constituent energy loss and its dependence on transverse momentum of particle, and centrality of collisions are estimated in the $z$-scaling approach.

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。

↑