Doubly heavy baryons in sum rules of NRQCD

被引：20

作者：

Kiselev, VV ^{[1
]}

Onishchenko, AI

机构：

[1] Protvino High Energy Phys Inst, State Res Ctr Russia, Protvino 142284, Moscow Region, Russia

[2] Inst Theoret & Expt Phys, Moscow 117259, Russia

来源：

NUCLEAR PHYSICS B | 2000年 / 581卷 / 1-2期

基金：

俄罗斯基础研究基金会;

关键词：

heavy quarks; sum rules; NRQCD; baryon;

D O I：

10.1016/S0550-3213(00)00128-0

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

The masses of baryons containing two heavy quarks and their couplings to the corresponding quark currents are evaluated in the framework of NRQCD sum rules. The Coulomb-like corrections in the system of doubly heavy diquark are taken into account, and the contribution of nonperturbative terms coming from the quark, gluon and mixed condensates as well as the product of quark and gluon condensates, is analyzed. The higher condensates destroy the factorization of baryon and diquark correlators and provide the convergency of sum rule method. As a result the accuracy of estimates is improved. (C) 2000 Elsevier Science B.V. All rights reserved.

引用

页码：432 / 448

页数：17

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