Production of heavy quarkonia in hadronic experiments

被引：2
作者：
Likhoded, A. K. [1 ]
Luchinsky, A. V. [1 ]
Poslavsky, S. V. [1 ]
机构：
[1] Kurchatov Inst, Natl Res Ctr, Inst High Energy Phys, Protvino 142280, Moscow Oblast, Russia
来源：
PHYSICS OF ATOMIC NUCLEI | 2015年 / 78卷 / 09期
基金：
俄罗斯基础研究基金会;
关键词：
MESONS; ANNIHILATION; COLLISIONS; DECAYS;
D O I：
10.1134/S1063778815090100
中图分类号：
O57 [原子核物理学、高能物理学];
学科分类号：
070202 ;
摘要：
The phenomenology of the production of P-wave chi (c,b) mesons and S-wave eta (c,b) mesons in highenergy hadron-hadron collisions was studied on the basis of nonrelativistic quantum chromodynamics (NRQCD). Available experimental data on chi (c) -meson production were analyzed, and nonperturbative NRQCDmatrix elements were determined from a fit to these data. It is shown that the observed transversemomentum (pT) spectrum of chi (c) mesons is basically formed by color-singlet contributions. At the same time, the ratio sigma(chi (c2))/sigma(chi (c1)) depends greatly on color-octet contributions; this ratio therefore becomes a highly sensitive tool for separating different NRQCD contributions. Predictions for chi (b) -meson production are obtained on the basis of NRQCD scaling rules. For the case of eta (c) -meson production, it is shown that the observed cross sections agree with the color-singlet model featuring phenomenological parameters.
引用
收藏
页码：1056 / 1065
页数：10
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