Mixing of X and Y states from QCD sum rules analysis

被引：2

作者：

Chen, Ze-Sheng ^{[1
]}

Huang, Zhuo-Ran ^{[2
]}

Jin, Hong-Ying ^{[1
]}

Steele, T. G. ^{[3
]}

Zhang, Zhu-Feng ^{[4
]}

机构：

[1] Zhejiang Univ, Dept Phys, Inst Modern Phys, Hangzhou 310027, Peoples R China

[2] Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China

[3] Univ Saskatchewan, Dept Phys & Engn Phys, Saskatoon, SK S7N 5E2, Canada

[4] Ningbo Univ, Dept Phys, Ningbo 315211, Peoples R China

来源：

CHINESE PHYSICS C | 2022年 / 46卷 / 06期

基金：

加拿大自然科学与工程研究理事会;

关键词：

four-quark states; QCD sum rules; non-perturbative QCD; RESONANCE PHYSICS;

D O I：

10.1088/1674-1137/ac531a

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：

We study (Q) over barQ (q) over barq and (Q) over bar qQ (q) over bar states as mixed states in QCD sum rules. By calculating the two-point correlation functions of pure states of their corresponding currents, we review the mass and coupling constant predictions of J(PC) = 1(++), 1(--), and 1(-+) states. By calculating the two-point mixed correlation functions of (Q) over bar QQ (q) over barq and (Q) over bar qQ (q) over bar currents, we estimate the mass and coupling constants of the corresponding "physical state" that couples to both (Q) over barQ (q) over barq and (Q) over bar qQ (q) over bar currents. Our results suggest that for 1(++) states, the (Q) over barQ (q) over barq and (Q) over bar qQ (q) over bar components are more likely to mix, while for 1(--) and 1(-+) states, there is less mixing between (Q) over barQ (q) over barq and (Q) over bar qQ (q) over bar. Our results suggest the Y series of states have more complicated components.

引用

页数：14

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