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arXiv 1409.0693hep-ph
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高能强子碰撞中$χ_c$ -和$χ_b$ -介子的产生

Production of $χ_c$- and $χ_b$-mesons in high energy hadronic collisions

A. K. Likhoded, A. V. Luchinsky, S. V. Poslavsky

摘要:

本文在NRQCD框架下研究了高能强子碰撞中$χ_{c,b}$ -介子的产生。我们分析了所有可用的实验数据$χ_c$ -介子生产和提取非微扰NRQCD矩阵元素拟合的数据。我们发现,$χ_c$介子的$p_T$谱主要由色单重态分量构成,而$σ(χ_{c2})/σ(χ_{c1})$比强烈地依赖于色八重态矩阵元,这个比成为研究NRQCD展开式中不同项贡献的一个高度灵敏的工具.用NRQCD标度规则给出了$χ_b$ -介子截面的预言。

英文摘要:

This paper is devoted to phenomenological study of $χ_{c,b}$-mesons production in high energy hadronic collisions in the framework of NRQCD. We analyze all available experimental data on $χ_c$-mesons production and extract non-perturbative NRQCD matrix elements from fitting the data. We show, that measured $p_T$-spectrum of $χ_c$-mesons is mainly formed by color singlet components, while $σ(χ_{c2})/σ(χ_{c1})$ ratio depends strongly on color octet matrix elements; this ratio becomes a highly sensitive tool to study contribution of different terms from the NRQCD expansion. Obtained using NRQCD scaling rules predictions for $χ_b$-mesons cross sections are also given.

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。

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