Analysis of the heavy quarkonium states hc and hb with QCD sum rules

被引：15

作者：

Wang, Zhi-Gang ^{[1
]}

机构：

[1] North China Elect Power Univ, Dept Phys, Baoding 071003, Peoples R China

来源：

EUROPEAN PHYSICAL JOURNAL C | 2013年 / 73卷 / 08期

关键词：

SPECTRUM; CHARMONIUM; DECAYS;

D O I：

10.1140/epjc/s10052-013-2533-4

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：

In this article, we take the tensor currents (Q) over bar (x)sigma(mu nu)Q(x) to interpolate the P-wave spin-singlet heavy quarkonium states h(Q), and study the masses and decay constants with the Borel sum rules and moments sum rules. The masses and decay constants from the Borel sum rules and moments sum rules are consistent with each other, the masses are also consistent with the experimental data. We can take the decay constants as basic input parameters and study other phenomenological quantities with the three-point correlation functions via the QCD sum rules. The heavy quarkonium states h(Q) couple potentially to the tensor currents (Q) over bar (x)sigma(mu nu)Q(x), and have the quark structure epsilon(ijk)xi(dagger)sigma(k)zeta besides the quark structure ik(2)(i)xi(dagger)sigma .((k) over right arrow (1) - (k) over right arrow (2))zeta. In calculations, we take into account the leading-order, next-to-leading-order perturbative contributions, and the gluon condensate, four-quark condensate contributions in the operator product expansion. The analytical expressions of the perturbative QCD spectral densities have applications in studying the two-body decays of a boson to two fermions with the vertexes sigma(mu nu)gamma 5 and sigma(mu nu).

引用

页码：1 / 12

页数：12

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