通过QCD质谱了解LHC处的$p/π$比率
Understanding the $p/π$ ratio at LHC due to QCD mass spectrum
摘要：
热拟合一致地再现了重离子碰撞的实验粒子产额，然而，来自ALICE Pb+Pb $\sqrt{s_{NN}}=2.76$ TeV的质子与π介子比被热模型过度预测-在$p/π$谜题中已知。在这里，我们测试扩展质谱的相关性，即，包括Hagedorn状态（遵循指数质谱并且具有非常短的寿命的共振）。我们发现，扩展的质谱是能够再现粒子比率在RHIC和LHC，以及能够匹配较低的$p/π$比率在LHC通过动态化学平衡。
英文摘要：
Thermal fits have consistently reproduced the experimental particles yields of heavy ion collisions, however, the proton to pion ratio from ALICE Pb+Pb $\sqrt{s_{NN}}=2.76$ TeV is over-predicted by thermal models- known at the $p/π$ puzzle. Here we test the relevance of the extended mass spectrum, i.e., include Hagedorn states (resonances that follow an exponential mass spectrum and have very short life times) on the $p/π$ puzzle. We find that the extended mass spectrum is able to reproduce particle ratios at both RHIC and the LHC as well as being able to match the lower $p/π$ ratio at the LHC through dynamical chemical equilibration.
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。
