Signatures of thermal dilepton radiation at ultrarelativistic energies
Signatures of thermal dilepton radiation at ultrarelativistic energies
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DOI：
10.1103/physrevc.63.054907
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发表时间：
2000-10
影响因子：
3.1
通讯作者：
R. Rapp
中科院分区：
文献类型：
--
作者：
R. Rapp
在RHIC能量范围内，对不变质量范围从0.5到3 GeV的重离子碰撞产生热双轻子的性质进行了评价。使用膨胀的热火球模型的演化通过夸克胶子和强子阶段的光谱的各种功能进行了处理。在低质量区域，由于预期的大背景，重点是可能的介质修改的窄共振结构从$\ensuremath{\omega}$和$\ensuremath{\varphi}$介子，而在中等质量区域的旧的想法，确定QGP辐射重申包括化学不饱和的影响，在早期阶段的中心Au+Au碰撞。
The properties of thermal dilepton production from heavy-ion collisions in the RHIC energy regime are evaluated for invariant masses ranging from 0.5 to 3 GeV. Using an expanding thermal fireball to model the evolution through both quark-gluon and hadronic phases various features of the spectra are addressed. In the low-mass region, due to an expected large background, the focus is on possible medium modifications of the narrow resonance structures from $\ensuremath{\omega}$ and $\ensuremath{\varphi}$ mesons, whereas in the intermediate-mass region the old idea of identifying QGP radiation is reiterated including effects of chemical undersaturation in the early stages of central Au+Au collisions.