论文标题
LHC精确物理时代的轻中性介子产生
Light neutral meson production in the era of precision physics at the LHC
论文作者
论文摘要
由于各种原因，在不同碰撞系统中的光中性介子的产生很有趣：在核核（AA）碰撞中，测量结果提供了有关遍历夸克 - 葡萄糖等离子体（QGP）的能量损失的重要信息，这些信息是在LHC的重型离子碰撞中形成的。在质子 - 普罗顿（PP）碰撞中，中性介子使我们能够高精度测试扰动QCD和其他模型计算的预测，还可以作为PA和AA碰撞的参考。在PA碰撞中，研究了冷核问题。在专门研究QGP的爱丽丝实验中，可以通过腐烂到两个光子来检测中性介子。后者可以使用两个量热仪EMCAL和PHO进行重建，也可以通过检测器材料中的转换来重建。将最新的重建技术与LHC在运行2中提供的大量数据样本相结合，这使我们有机会提高测量的精度。在这些程序中，提出了用爱丽丝探测器测量的LHC Energies中PP，P-PB和PB-PB碰撞中中性介子产生的概述。
The production of light neutral mesons in different collision systems is interesting for a variety of reasons: In nucleus-nucleus (AA) collisions the measurements provide important information on the energy loss of partons traversing the Quark-Gluon Plasma (QGP) which is formed in heavy-ion collisions at the LHC. In proton--proton (pp) collisions, neutral mesons allow us to test with high precision the predictions of perturbative QCD and other model calculations, and also serve as a reference for pA and AA collisions. In pA collisions, cold nuclear matter effects are studied. In the ALICE experiment, which is dedicated to the study of the QGP, neutral mesons can be detected via their decay to two photons. The latter can be reconstructed using the two calorimeters EMCal and PHOS or via conversions in the detector material. Combining state-of-the-art reconstruction techniques with the large data sample delivered by the LHC in Run 2 gives us the opportunity to enhance the precision of our measurements. In these proceedings, an overview of neutral meson production in pp, p--Pb and Pb--Pb collisions at LHC energies, as measured with the ALICE detector is presented.
