Multiplicity Correlations in the Model with String Clusters in pp Collisions at LHC Energies

IF 0.6 4区 物理与天体物理 Q4 PHYSICS, PARTICLES & FIELDS Physics of Particles and Nuclei Pub Date : 2024-08-18 DOI:10.1134/S1063779624700539
S. N. Belokurova, V. V. Vechernin
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Abstract

In the framework of the model with string fusion and the formation of string clusters, the correlations between multiplicities in two separated rapidity windows in pp collisions at LHC energies were studied and the results obtained were compared with data from the ALICE collaboration at CERN. The simulation is conducted within the framework of a Monte Carlo implementation of the color quark–gluon string model. String fusion effects are considered by implementing a finite lattice in the plane of the impact parameter. The dependence of the correlation coefficient between multiplicities in two rapidity observation windows on the distance between these windows is calculated for four values of their width and three values of initial energy. It is shown that the model with string clusters describes the major features of the behavior of the correlation coefficient: its increase with increasing initial energy, decrease with increasing rapidity distance between observation windows, and nonlinear dependence on the width of the rapidity window.

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大型强子对撞机能量下pp对撞中弦簇模型的多重相关性
摘要 在弦融合和弦簇形成模型的框架内,研究了在大型强子对撞机能量下pp对撞中两个分离的快速窗口中倍率之间的相关性,并将所得结果与欧洲核子研究中心ALICE合作的数据进行了比较。模拟是在彩色夸克-胶子弦模型的蒙特卡罗实施框架内进行的。通过在撞击参数平面上实施有限晶格,考虑了弦融合效应。根据四个窗口宽度值和三个初始能量值,计算了两个快速观测窗口中倍率之间的相关系数与这些窗口之间距离的关系。结果表明,弦簇模型描述了相关系数行为的主要特征:相关系数随初始能量的增加而增加,随观察窗间快速距离的增加而减小,以及与快速窗宽度的非线性关系。
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来源期刊
Physics of Particles and Nuclei
Physics of Particles and Nuclei 物理-物理:粒子与场物理
CiteScore
1.00
自引率
0.00%
发文量
116
审稿时长
6-12 weeks
期刊介绍: The journal Fizika Elementarnykh Chastits i Atomnogo Yadr of the Joint Institute for Nuclear Research (JINR, Dubna) was founded by Academician N.N. Bogolyubov in August 1969. The Editors-in-chief of the journal were Academician N.N. Bogolyubov (1970–1992) and Academician A.M. Baldin (1992–2001). Its English translation, Physics of Particles and Nuclei, appears simultaneously with the original Russian-language edition. Published by leading physicists from the JINR member states, as well as by scientists from other countries, review articles in this journal examine problems of elementary particle physics, nuclear physics, condensed matter physics, experimental data processing, accelerators and related instrumentation ecology and radiology.
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