Quarkonium spectroscopy and perturbative QCD: a new perspective

被引：90

作者：

Brambilla, N

Sumino, Y

Vairo, A

机构：

[1] Univ Milan, Dipartimento Fis, I-20133 Milan, Italy

[2] Tohoku Univ, Dept Phys, Sendai, Miyagi 9808578, Japan

[3] Heidelberg Univ, Inst Theoret Phys, D-69120 Heidelberg, Germany

来源：

PHYSICS LETTERS B | 2001年 / 513卷 / 3-4期

关键词：

D O I：

10.1016/S0370-2693(01)00611-6

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We study the energy spectrum of bottomonium in perturbative QCD, taking alpha (s) (M-Z) = 0.1181 +/- 0.0020 as input and fixing m(b)((MS) over bar) (m(b)((MS) over bar)) on the Y(1S) mass. Contrary to wide beliefs, perturbative QCD reproduces reasonably well the gross structure of the spectrum as long as the coupling constant remains smaller than one. We perform a detailed analysis and discuss the size of nonperturbative effects. A new qualitative picture on the structure of the bottomonium spectrum is provided. The lowest-lying c (c) over bar and b (c) over bar states are also examined. (C) 2001 Published by Elsevier Science B.V.

引用

页码：381 / 390

页数：10

共 39 条

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