&Lambda;<sub>c</sub>重子谱疑难(英文)

吕齐放; 董宇兵; 刘翔; MATSUKI Takayuki

doi:10.11804/NuclPhysRev.35.01.001

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Λ_c重子谱疑难(英文)

吕齐放, 董宇兵, 刘翔, MATSUKI Takayuki

文章导航 > 原子核物理评论 > 2018 > 35(1): 1-4

吕齐放, 董宇兵, 刘翔, MATSUKI Takayuki. Λc重子谱疑难(英文)[J]. 原子核物理评论, 2018, 35(1): 1-4. doi: 10.11804/NuclPhysRev.35.01.001

引用本文:

吕齐放, 董宇兵, 刘翔, MATSUKI Takayuki. Λ_c重子谱疑难(英文)[J]. 原子核物理评论, 2018, 35(1): 1-4. doi: 10.11804/NuclPhysRev.35.01.001

LÜ Qifang, DONG Yubing, LIU Xiang, MATSUKI Takayuki. Puzzle of the Λc Spectrum[J]. Nuclear Physics Review, 2018, 35(1): 1-4. doi: 10.11804/NuclPhysRev.35.01.001

Citation:

LÜ Qifang, DONG Yubing, LIU Xiang, MATSUKI Takayuki. Puzzle of the Λ_c Spectrum[J]. Nuclear Physics Review, 2018, 35(1): 1-4. doi: 10.11804/NuclPhysRev.35.01.001

Λ_c重子谱疑难(英文)

doi: 10.11804/NuclPhysRev.35.01.001

1.
湖南师范大学物理系, 长沙 410081;
2.
中国科学院高能物理研究所, 北京 100049;
3.
中国科学院大科学装置理论物理研究中心, 北京 100049;
4.
兰州大学物理科学与技术学院, 兰州 730000;
5.
兰州大学&中国科学院近代物理研究所, 强子与 CSR 物理研究中心, 兰州 730000;
6.
Tokyo Kasei University, 1-18-1 Kaga, Itabashi, Tokyo 173-8602, Japan;
7.
Theoretical Research Division, Nishina Center, RIKEN, Wako, Saitama 351-0198, Japan

基金项目: 国家自然科学基金资助项目（11475192，11305003，11222547，11175073，11447604，11705056，U1204115）

详细信息

通讯作者: 刘翔

中图分类号: O572.24⁺3

Puzzle of the Λ_c Spectrum

1.
Department of Physics, Hunan Normal University, Changsha 410081, China;
2.
Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China;
3.
Theoretical Physics Center for Science Facilities(TPCSF), Chinese Academy of Sciences, Beijing 100049, China;
4.
School of Physical Science and Technology, Lanzhou University, Lanzhou 730000, China;
5.
Research Center for Hadron and CSR Physics, Lanzhou University & Institute of Modern Physics of CAS, Lanzhou 730000, China;
6.
Tokyo Kasei University, 1-18-1 Kaga, Itabashi, Tokyo 173-8602, Japan;
7.
Theoretical Research Division, Nishina Center, RIKEN, Wako, Saitama 351-0198, Japan

Funds: National Natural Science Foundation of China (11475192, 11305003, 11222547, 11175073, 11447604, 11705056, U1204115)

More Information

Corresponding author: LIU Xiang

摘要: Λ_c⁺重子家族存在一个疑难，也就是重夸克有效理论预言的轨道角动量为L=2的多重态中J^P=3/2⁺的态在实验上是缺失的，而且已发现的Λ_c（2765）⁺和Λ_c（2940）⁺的J^P量子数仍然未知。在本工作中，我们使用双夸克图像计算了重子的质量，研究了Λ_c（2765）⁺和Λ_c（2940）⁺的可能归类以及仍缺失的具有L=2和J^P=3/2⁺量子数的Λ_c⁺态，进而指出Λ_c（2880）⁺的峰结构中实际上已经包含了L=2、J^P=3/2⁺这一缺失态，并建议Λ_c（2765）⁺和Λ_c（2940）⁺的量子数应分别为2S（1/2⁺）和2P（1/2^-）。

There is a puzzle in the Λ_c⁺ family, i.e., one member with J^P=3/2⁺ is missing in a L=2 multiplet which the heavy quark effective theory predicts, and J^P's of Λ_c(2765)⁺ and Λ_c(2940)⁺ are unknown. Using a light diquark picture to calculate baryon masses, we study possible assignments of two Λ_c's with unknown J^P and the missing Λ_c⁺ with 3/2⁺ for L=2, and we find the most probable possibility that the peak corresponding to Λ_c(2880)⁺ actually includes a missing member with spin 3/2⁺ for L=2 and that quantum numbers of Λ_c(2765)⁺ and Λ_c(2940)⁺ are 2S(1/2⁺) and 2P (1/2^-), respectively.
- &Lambda /
- _c家族 /
- 相对论夸克模型 /
- 对夸克
Abstract: There is a puzzle in the Λ_c⁺ family, i.e., one member with J^P=3/2⁺ is missing in a L=2 multiplet which the heavy quark effective theory predicts, and J^P's of Λ_c(2765)⁺ and Λ_c(2940)⁺ are unknown. Using a light diquark picture to calculate baryon masses, we study possible assignments of two Λ_c's with unknown J^P and the missing Λ_c⁺ with 3/2⁺ for L=2, and we find the most probable possibility that the peak corresponding to Λ_c(2880)⁺ actually includes a missing member with spin 3/2⁺ for L=2 and that quantum numbers of Λ_c(2765)⁺ and Λ_c(2940)⁺ are 2S(1/2⁺) and 2P (1/2^-), respectively.
- &Lambda /
- _c family /
- relativized quark model /
- diquark

[1]	MATSUKI T, LÜ Q F, DONG Y B, et al. Phys Lett B, 2016, 758:274.
[2]	AFONIN S S. Phys Rev C, 2007, 76, 015202.
[3]	AFONIN S S, PUSENKOV I V. Mod Phys Lett A, 2014, 29:1450193.
[4]	OLIVE K A[Particle Data Group Collaboration]. Chin Phys C, 2014, 38:090001.
[5]	DONG Y B, FAESSLER A, GUTSCHE T, et al. Phys Rev D, 2010, 81:014006.
[6]	DONG Y B, FAESSLER A, GUTSCHE T,et al. Phys Rev D, 2010, 82:034035.
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[11]	CHEN B, WEI K W, LIU X, MATSUKI T. arXiv:1609.07967[hep-ph].
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[13]	ABE K[Belle Collaboration]. Phys Rev Lett, 2007, 98:262001.
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Λ_c重子谱疑难(英文)

doi: 10.11804/NuclPhysRev.35.01.001

1. 湖南师范大学物理系, 长沙 410081;

2. 中国科学院高能物理研究所, 北京 100049;

3. 中国科学院大科学装置理论物理研究中心, 北京 100049;

4. 兰州大学物理科学与技术学院, 兰州 730000;

5. 兰州大学&中国科学院近代物理研究所, 强子与 CSR 物理研究中心, 兰州 730000;

6. Tokyo Kasei University, 1-18-1 Kaga, Itabashi, Tokyo 173-8602, Japan;

7. Theoretical Research Division, Nishina Center, RIKEN, Wako, Saitama 351-0198, Japan

基金项目: 国家自然科学基金资助项目（11475192，11305003，11222547，11175073，11447604，11705056，U1204115）

通讯作者: 刘翔

收稿日期: 2017-10-27
修回日期: 2017-11-22
刊出日期: 2018-03-20

中图分类号: O572.24⁺3

关键词:

&Lambda /

_c家族 /

相对论夸克模型 /

对夸克

摘要: Λ_c⁺重子家族存在一个疑难，也就是重夸克有效理论预言的轨道角动量为L=2的多重态中J^P=3/2⁺的态在实验上是缺失的，而且已发现的Λ_c（2765）⁺和Λ_c（2940）⁺的J^P量子数仍然未知。在本工作中，我们使用双夸克图像计算了重子的质量，研究了Λ_c（2765）⁺和Λ_c（2940）⁺的可能归类以及仍缺失的具有L=2和J^P=3/2⁺量子数的Λ_c⁺态，进而指出Λ_c（2880）⁺的峰结构中实际上已经包含了L=2、J^P=3/2⁺这一缺失态，并建议Λ_c（2765）⁺和Λ_c（2940）⁺的量子数应分别为2S（1/2⁺）和2P（1/2^-）。

There is a puzzle in the Λ_c⁺ family, i.e., one member with J^P=3/2⁺ is missing in a L=2 multiplet which the heavy quark effective theory predicts, and J^P's of Λ_c(2765)⁺ and Λ_c(2940)⁺ are unknown. Using a light diquark picture to calculate baryon masses, we study possible assignments of two Λ_c's with unknown J^P and the missing Λ_c⁺ with 3/2⁺ for L=2, and we find the most probable possibility that the peak corresponding to Λ_c(2880)⁺ actually includes a missing member with spin 3/2⁺ for L=2 and that quantum numbers of Λ_c(2765)⁺ and Λ_c(2940)⁺ are 2S(1/2⁺) and 2P (1/2^-), respectively.

English Abstract

Puzzle of the Λ_c Spectrum

1. Department of Physics, Hunan Normal University, Changsha 410081, China;

2. Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China;

3. Theoretical Physics Center for Science Facilities(TPCSF), Chinese Academy of Sciences, Beijing 100049, China;

4. School of Physical Science and Technology, Lanzhou University, Lanzhou 730000, China;

5. Research Center for Hadron and CSR Physics, Lanzhou University & Institute of Modern Physics of CAS, Lanzhou 730000, China;

6. Tokyo Kasei University, 1-18-1 Kaga, Itabashi, Tokyo 173-8602, Japan;

7. Theoretical Research Division, Nishina Center, RIKEN, Wako, Saitama 351-0198, Japan

Funds: National Natural Science Foundation of China (11475192, 11305003, 11222547, 11175073, 11447604, 11705056, U1204115)

Corresponding author: LIU Xiang

Received Date: 2017-10-27
Rev Recd Date: 2017-11-22
Publish Date: 2018-03-20

Keywords:

Abstract: There is a puzzle in the Λ_c⁺ family, i.e., one member with J^P=3/2⁺ is missing in a L=2 multiplet which the heavy quark effective theory predicts, and J^P's of Λ_c(2765)⁺ and Λ_c(2940)⁺ are unknown. Using a light diquark picture to calculate baryon masses, we study possible assignments of two Λ_c's with unknown J^P and the missing Λ_c⁺ with 3/2⁺ for L=2, and we find the most probable possibility that the peak corresponding to Λ_c(2880)⁺ actually includes a missing member with spin 3/2⁺ for L=2 and that quantum numbers of Λ_c(2765)⁺ and Λ_c(2940)⁺ are 2S(1/2⁺) and 2P (1/2^-), respectively.

吕齐放, 董宇兵, 刘翔, MATSUKI Takayuki. Λc重子谱疑难(英文)[J]. 原子核物理评论, 2018, 35(1): 1-4. doi: 10.11804/NuclPhysRev.35.01.001

引用本文:

吕齐放, 董宇兵, 刘翔, MATSUKI Takayuki. Λ_c重子谱疑难(英文)[J]. 原子核物理评论, 2018, 35(1): 1-4. doi: 10.11804/NuclPhysRev.35.01.001

LÜ Qifang, DONG Yubing, LIU Xiang, MATSUKI Takayuki. Puzzle of the Λc Spectrum[J]. Nuclear Physics Review, 2018, 35(1): 1-4. doi: 10.11804/NuclPhysRev.35.01.001

Citation:

LÜ Qifang, DONG Yubing, LIU Xiang, MATSUKI Takayuki. Puzzle of the Λ_c Spectrum[J]. Nuclear Physics Review, 2018, 35(1): 1-4. doi: 10.11804/NuclPhysRev.35.01.001