Evidence for diquarks in lattice QCD

被引：102

作者：

Alexandrou, C. ^{[1
]}

de Forcrand, Ph.

Lucini, B.

机构：

[1] Univ Cyprus, Dept Phys, CY-1678 Nicosia, Cyprus

[2] ETH, Inst Theoret Phys, CH-8093 Zurich, Switzerland

[3] CERN, Dept Phys, TH Unit, CH-1211 Geneva 23, Switzerland

[4] Univ Coll Swansea, Dept Phys, Swansea SA2 8PP, W Glam, Wales

来源：

PHYSICAL REVIEW LETTERS | 2006年 / 97卷 / 22期

关键词：

D O I：

10.1103/PhysRevLett.97.222002

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Diquarks may play an important role in hadron spectroscopy, baryon decays, and color superconductivity. We investigate the existence of diquark correlations in lattice QCD by considering systematically all the lowest energy diquark channels in a color gauge-invariant setup. We measure mass differences between the various channels and show that the positive parity scalar diquark is the lightest. Quark-quark correlations inside the diquark are clearly seen in this channel, and yield a diquark size of O(1) fm.

引用

页数：4

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