Revisiting the nature of the P-c pentaquarks
文献类型：期刊论文
| 作者 | Du, Meng-Lin; Baru, Vadim3,4,5; Guo, Feng-Kun ; Hanhart, Christoph; Meissner, Ulf-G.; Oller, Jose A.; Wang, Qian12,13,14
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| 刊名 | JOURNAL OF HIGH ENERGY PHYSICS
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| 出版日期 | 2021 |
| 期号 | 8页码:157 |
| 关键词 | HIDDEN-CHARM PENTAQUARK HEAVY SYMMETRY |
| ISSN号 | 1029-8479 |
| DOI | 10.1007/JHEP08(2021)157 |
| 英文摘要 | The nature of the three narrow hidden-charm pentaquark P-c states, i.e., P-c (4312), P-c (4440) and P-c (4457), is under intense discussion since their discovery from the updated analysis of the process Lambda(0)(b) -> I ) J/psi pK(-) by LHCb. In this work we extend our previous coupled-channel approach [Phys. Rev. Lett. 124, 072001 (2020)], in which the Pc states are treated as Sigma(()(c)*()) (D) over bar (()*()) molecules, by including the Lambda(c)(D) over bar (()*()) and eta(c)p as explicit inelastic channels in addition to the J/psi p, as required by unitarity and heavy quark spin symmetry (HQSS), respectively. Since inelastic parameters are very badly constrained by the current data, three calculation schemes are considered: (a) scheme I with pure contact interactions between the elastic, i.e., Sigma(()(c)*()) (D) over bar (()*()), and inelastic channels and without the Lambda(c)(D) over bar (()*()) interactions, (b) scheme II, where the one-pion exchange (OPE) is added to scheme I, and (c) scheme III, where the Lambda(c)(D) over bar (()*()) interactions are included in addition. It is shown that to obtain cutoff independent results, OPE in the multichannel system is to be supplemented with S-wave-to-D-wave mixing contact terms. As a result, in line with our previous analysis, we demonstrate that the experimental data for the J/psi p invariant mass distribution are consistent with the interpretation of the P-c(4312) and P-c(4440)/P-c(4457) as Sigma(c)(D) over bar and Sigma(c)(D) over bar* hadronic molecules, respectively, and that the data show clear evidence for a new narrow state, P-c(4380), identified as a Sigma(c)*(D) over bar molecule, which should exist as a consequence of HQSS. While two statistically equally good solutions are found in scheme I, only one of these solutions with the quantum numbers of the P-c (4440) and P-c (4457) being J(P) = 3/2(-) and 1/2(-), respectively, survives the requirement of regulator independence once the OPE is included. Moreover, we predict the line shapes in the elastic and inelastic channels and demonstrate that those related to the P-c (4440) and the P-c (4457) in the Sigma(()(c)*())<(D)over ( )anf eta(c)p mass distributions from Lambda(0)(b) ->( )Sigma(()(c)*()) (D) over barK(-) and Lambda(0)(b) -> eta(c)pK(-) will shed light on the quantum numbers of those states, once the data are available. We also investigate possible pentaquark signals in the Lambda(c)(D) over bar (()*()) final states. |
| 学科主题 | Physics |
| 语种 | 英语 |
| 源URL | [http://ir.itp.ac.cn/handle/311006/27466]  |
| 专题 | 理论物理研究所_理论物理所1978-2010年知识产出 |
| 作者单位 | 1.[Du, Meng-Lin; Meissner, Ulf-G.] Univ Bonn, Helmholtz Inst Strahlen & Kernphys, D-53115 Bonn, Germany 2.Du, Meng-Lin; Meissner, Ulf-G.] Univ Bonn, Bethe Ctr Theoret Phys, D-53115 Bonn, Germany 3.Inst Invest Paterna, Inst Fis Corpuscular, Ctr Mixto CSIC UV, Apartado 22085, Valencia 46071, Spain 4.Ruhr Univ Bochum, Inst Theoret Phys 2, D-44780 Bochum, Germany 5.Inst Theoret & Expt Phys NRC Kurchatov Inst, Moscow 117218, Russia 6.Russian Acad Sci, PN Lebedev Phys Inst, Leninskiy Prospect 53, Moscow 119991, Russia 7.Chinese Acad Sci, Inst Theoret Phys, CAS Key Lab Theoret Phys, Zhong Guan Cun East St 55, Beijing 100190, Peoples R China 8.Univ Chinese Acad Sci, Sch Phys Sci, Beijing 100049, Peoples R China 9.Hanhart, Christoph; Meissner, Ulf-G.] Forschungszentrum Julich, Inst Adv Simulat, Inst Kernphys, D-52425 Julich, Germany 10.Hanhart, Christoph; Meissner, Ulf-G.] Forschungszentrum Julich, Julich Ctr Hadron Phys, D-52425 Julich, Germany |
| 推荐引用方式 GB/T 7714 | Du, Meng-Lin,Baru, Vadim,Guo, Feng-Kun,et al. Revisiting the nature of the P-c pentaquarks[J]. JOURNAL OF HIGH ENERGY PHYSICS,2021(8):157. |
| APA | Du, Meng-Lin.,Baru, Vadim.,Guo, Feng-Kun.,Hanhart, Christoph.,Meissner, Ulf-G..,...&Wang, Qian.(2021).Revisiting the nature of the P-c pentaquarks.JOURNAL OF HIGH ENERGY PHYSICS(8),157. |
| MLA | Du, Meng-Lin,et al."Revisiting the nature of the P-c pentaquarks".JOURNAL OF HIGH ENERGY PHYSICS .8(2021):157. |
入库方式： OAI收割
来源：理论物理研究所
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