Small-pT Production of Polarised J/ψ Mesons within the Soft Gluon Resummation Approach

IF 0.4 Q4 PHYSICS, PARTICLES & FIELDS

Physics of Particles and Nuclei Letters Pub Date : 2025-10-03 DOI:10.1134/S1547477125700918

V. A. Saleev, K. K. Shilyaev

引用次数: 0

Abstract

In this work we use the Soft Gluon Resummation approach as a noncollinear factorization model to describe polarisation of \(J{\text{/}}\psi \) within NRQCD as a hadronization model. We extract nonperturbative LDME for octet color states of charmonium by fitting them to unpolarised \(J{\text{/}}\psi \) production data of PHENIX and STAR collaborations at \(\sqrt s = 200\) GeV. We make prediction for an angular coefficient \(\lambda \) as a polarisation indicator for \(J{\text{/}}\psi \) in the helicity frame and compare it with the PHENIX polarisation data.

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软胶子恢复法中极化J/ψ介子的小pt生成

在这项工作中，我们使用软胶子恢复方法作为非线性分解模型来描述NRQCD内\(J{\text{/}}\psi \)的极化作为强子化模型。我们通过将其拟合到\(\sqrt s = 200\) GeV的PHENIX和STAR合作项目的未极化\(J{\text{/}}\psi \)生产数据，提取了charmonium的八元体色态的非微扰LDME。我们预测了角系数\(\lambda \)作为螺旋框架中\(J{\text{/}}\psi \)的偏振指标，并将其与PHENIX偏振数据进行了比较。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Physics of Particles and Nuclei Letters PHYSICS, PARTICLES & FIELDS-

CiteScore

0.80

自引率

20.00%

发文量

108

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.