X(2900) in a chiral quark model

被引：14

作者：

Tan, Yue ^{[1
,2
,3
]}

Ping, Jialun ^{[1
,2
]}

机构：

[1] Nanjing Normal Univ, Dept Phys, Nanjing 210023, Peoples R China

[2] Nanjing Normal Univ, Jiangsu Key Lab Numer Simulat Large SaSyst, Nanjing 210023, Peoples R China

[3] Yancheng Univ, Dept Phys, Nanjing 210023, Peoples R China

来源：

CHINESE PHYSICS C | 2021年 / 45卷 / 09期

基金：

中国国家自然科学基金;

关键词：

X(2900); quark model; gaussian expansion method; real-scaling method;

D O I：

10.1088/1674-1137/ac0ba4

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：

Recently, the LHCb Collaboration reported their observation of the first two fully open-flavor tetraquark states named X-0(2900) and X-1(2900) with unknown parity. Inspired by the report, we consider all the possible fourquark candidates for X(2900), which include the molecular structure, diquark structure, and their coupling in a chiral quark model via the Gaussian expansion method. To identify the genuine resonances, the real-scaling method (stabilization method) was employed. Our results show that five possible resonances, R-0(2914) with Gamma = 42 MeV, R-1(2906) with Gamma = 29 MeV, R-1(2912) with Gamma = 10 MeV, R-J(2920) with Gamma = 9 MeV, and R-J(2842) with Gamma = 24 MeV, originate in the cs (q) over bar(q) over bar system. Compared with experimental data, R-0(2914) with Gamma = 42 MeV may be an optimal X-0(2900) candidate. However, none of the resonances have a similar width for X-1(2900). Hence, further study is required.

引用

页数：10

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