QCD sum rules approach to the X, Y and Z states

被引：103

作者：

Albuquerque, Raphael M. ^{[1
]}

Dias, Jorgivan M. ^{[2
]}

Khemchandani, K. P. ^{[3
]}

Martinez Torres, A. ^{[2
]}

Navarra, Fernando S. ^{[2
]}

Nielsen, Marina ^{[2
]}

Zanetti, Carina M. ^{[1
]}

机构：

[1] Univ Rio de Janeiro, Fac Tecnol, FAT, UERJ, Rod Presidente Dutra Km 298, BR-27537000 Resende, RJ, Brazil

[2] Univ Sao Paulo, Inst Fis, Rua Matao,Travessa R187, BR-05508090 Sao Paulo, SP, Brazil

[3] Univ Fed Sao Paulo, BR-01302907 Diadema, SP, Brazil

来源：

JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS | 2019年 / 46卷 / 09期

关键词：

exotic charmonium states; QCD sum rules; non-perturbative methods; CHIRAL SYMMETRY-BREAKING; GLUON CONDENSATE; CURRENT CORRELATORS; QUARK MASS; J/PSI-PHI; HEAVY TETRAQUARKS; POWER CORRECTIONS; ROOT-S=1.96 TEV; BARYON MASSES; FORM-FACTORS;

D O I：

10.1088/1361-6471/ab2678

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：

In the past decade, due to the experimental observation of many charmonium-like states, there has been a revival of hadron spectroscopy. In particular, the experimental observation of charged charmonium-like K. states, and bottomonium-like Z(b) states, represents a challenge since they can not be accommodated within the naive quark model. These charged states are good candidates of either tetraquark or molecular states and their observation motivated a vigorous theoretical activity. This is a rapidly evolving field with enormous amounts of new experimental information. In this work, we review the current experimental progress and investigate various theoretical interpretations of these candidates of the multiquark states. The present review is written from the perspective of the QCD sum rules approach, where we present the main steps of concrete calculations and compare the results with other approaches and with experimental data.

引用

页数：105

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