{"title":"Influence of Short-Range Rapidity Correlations on Multiplicity Fluctuations","authors":"V. V. Vechernin, S. N. Belokurova","doi":"10.1134/S1547477124702091","DOIUrl":null,"url":null,"abstract":"<p>The influence of short-range rapidity correlations on the fluctuation of the number of charged particles in a given rapidity interval of observation is investigated. It is shown that for pp collisions at LHC energies, the fluctuations of the particle number from a given string cluster are, due to the presence of short-range correlations between particles, significantly larger than the Poisson ones. The value of the scaled and robust variance of the multiplicity for <i>pp</i> collisions is calculated at three initial energies: 0.9, 2.76, and 7 TeV, both with and without taking into account the processes of string fusion and formation of string clusters. A comparison with experimental data is performed and it is shown that the results obtained taking into account the formation of string clusters agree well with the experimental values, in contrast to the case where string fusion processes are not taken into account.</p>","PeriodicalId":730,"journal":{"name":"Physics of Particles and Nuclei Letters","volume":"22 1","pages":"194 - 198"},"PeriodicalIF":0.4000,"publicationDate":"2025-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Physics of Particles and Nuclei Letters","FirstCategoryId":"1085","ListUrlMain":"https://link.springer.com/article/10.1134/S1547477124702091","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"PHYSICS, PARTICLES & FIELDS","Score":null,"Total":0}
引用次数: 0
Abstract
The influence of short-range rapidity correlations on the fluctuation of the number of charged particles in a given rapidity interval of observation is investigated. It is shown that for pp collisions at LHC energies, the fluctuations of the particle number from a given string cluster are, due to the presence of short-range correlations between particles, significantly larger than the Poisson ones. The value of the scaled and robust variance of the multiplicity for pp collisions is calculated at three initial energies: 0.9, 2.76, and 7 TeV, both with and without taking into account the processes of string fusion and formation of string clusters. A comparison with experimental data is performed and it is shown that the results obtained taking into account the formation of string clusters agree well with the experimental values, in contrast to the case where string fusion processes are not taken into account.
期刊介绍：
The journal Physics of Particles and Nuclei Letters, brief name Particles and Nuclei Letters, publishes the articles with results of the original theoretical, experimental, scientific-technical, methodological and applied research. Subject matter of articles covers: theoretical physics, elementary particle physics, relativistic nuclear physics, nuclear physics and related problems in other branches of physics, neutron physics, condensed matter physics, physics and engineering at low temperatures, physics and engineering of accelerators, physical experimental instruments and methods, physical computation experiments, applied research in these branches of physics and radiology, ecology and nuclear medicine.
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