期刊
JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS
卷 49, 期 5, 页码 -出版社
IOP Publishing Ltd
DOI: 10.1088/1361-6471/ac5d0b
关键词
transverse momentum spectra; pseudorapidity distribution; Monte Carlo prediction; bulk properties of nuclear matter
资金
- National Natural Science Foundation of China [12147215, 12047571, 11575103, 11947418]
- Scientific and Technological Innovation Programs of Higher Education Institutions in Shanxi (STIP) [201802017]
- Shanxi Provincial Natural Science Foundation [201901D111043]
- Fund for Shanxi '1331 Project' Key Subjects Construction
This study compares the predictions of different Monte Carlo event generators (including HUING, Pythia, and QGSJETII) with experimental data obtained from the CMS Collaboration at CERN. Results show that Pythia reproduces the experimental data more accurately in most cases, while HUING and QGSJETII can only reproduce the data within a limited range. Additionally, parameter values relevant to the study of bulk properties of hadronic matter at high energy were extracted using two analytic functions, and it was found that the values extracted from the RUING and Pythia models are closer to the experimental data than those extracted from the QGSJETII model.
We report the predictions of different Monte Carlo event generators including HUING, Pythia, and QGSJETII in comparison with the experimental data measured by the CMS Collaboration at CERN in proton-proton (pp) collisions at center-of-mass energy root s = 0.9 and 2.36 TeV. The CMS experimental transverse momentum (p(T) or p(perpendicular to)) spectra of charged hadrons were measured for pseudorapidity range 0 <= eta <= 2.4 with bin width of eta = 0.2 (for p(T) from 0.1 to 2 GeV/c) and a single bin of eta for vertical bar eta vertical bar< 2.4 (for p(T) from 0.1 to 4 GeV/c). Pythia reproduced the p(T) spectra with reasonable agreement for most of the p(T) range. It depicts better results in the case of the vertical bar eta vertical bar < 2.4 than HUING and QGSJETII which could reproduce the spectra in a limited p(T) range. Furthermore, to analyze the p(T) spectra of charged hadrons measured by the CMS Collaboration, we used a three-component function (structured from the Boltzmann distribution) and the q-dual function (from the q-dual statistics) to extract parameter values relevant for the study of bulk properties of hadronic matter at high energy. We have also applied the two analytic functions over the model predictions. The values extracted by the functions from the RUING and Pythia models are closer to the experimental data than the QGSJETII model. Although the models could reproduce the p(T) spectra of all charged particles in some of the p(T) range but none of them could reproduce the distributions over the entire p(T )range and in all the pseudorapidity regions.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据