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Deciphering the mechanism of near-threshold J/psi photoproduction

文献类型：期刊论文

作者Du, Meng-Lin; Baru, Vadim2,3; Guo, Feng-Kun; Hanhart, Christoph; Meissner, Ulf-G; Nefediev, Alexey3,9,10; Strakovsky, Igor11
刊名EUROPEAN PHYSICAL JOURNAL C
出版日期2020
卷号80期号:11页码:1053
关键词QUARKONIUM INTERACTIONS PENTAQUARK
ISSN号1434-6044
DOI10.1140/epjc/s10052-020-08620-5
英文摘要The photoproduction of the J/psi off the proton is believed to deepen our understanding of various physics issues. On the one hand, it is proposed to provide access to the origin of the proton mass, based on the QCD multipole expansion. On the other hand, it can be employed in a study of pentaquark states. The process is usually assumed to proceed through vector-meson dominance, that is the photon couples to a J/psi which rescatters with the proton to give the J/psi p final state. In this paper, we provide a compelling hint for and propose measurements necessary to confirm a novel production mechanism via the Lambda cD() intermediate states. In particular, there must be cusp structures at the Lambda cD() thresholds in the energy dependence of the J/psi photoproduction cross section. The same mechanism also implies the J/psi -nucleon scattering lengths of order 1 mfm. Given this, one expects only a minor contribution of charm quarks to the nucleon mass.
学科主题Physics
语种英语
源URL[http://ir.itp.ac.cn/handle/311006/27302]  
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.Univ Bonn, Helmholtz Inst Strahlen & Kernphys, D-53115 Bonn, Germany
2.Univ Bonn, Bethe Ctr Theoret Phys, D-53115 Bonn, Germany
3.Kurchatov Inst, Inst Theoret & Expt Phys NRC, Moscow 117218, Russia
4.Russian Acad Sci, PN Lebedev Phys Inst, Leninskiy Prospect 53, Moscow 119991, Russia
5.Chinese Acad Sci, Inst Theoret Phys, CAS Key Lab Theoret Phys, Zhong Guan Cun East St 55, Beijing 100190, Peoples R China
6.Univ Chinese Acad Sci, Sch Phys Sci, Beijing 100049, Peoples R China
7.Forschungszentrum Julich, Inst Kernphys, Inst Adv Simulat, D-52425 Julich, Germany
8.Forschungszentrum Julich, Julich Ctr Hadron Phys, D-52425 Julich, Germany
9.Tbilisi State Univ, GE-0186 Tbilisi, Georgia
10.Moscow Inst Phys & Technol, Inst Sky Lane 9, Dolgoprudnyi 141700, Moscow Region, Russia
推荐引用方式
GB/T 7714		 Du, Meng-Lin,Baru, Vadim,Guo, Feng-Kun,et al. Deciphering the mechanism of near-threshold J/psi photoproduction[J]. EUROPEAN PHYSICAL JOURNAL C,2020,80(11):1053.
APA Du, Meng-Lin.,Baru, Vadim.,Guo, Feng-Kun.,Hanhart, Christoph.,Meissner, Ulf-G.,...&Strakovsky, Igor.(2020).Deciphering the mechanism of near-threshold J/psi photoproduction.EUROPEAN PHYSICAL JOURNAL C,80(11),1053.
MLA Du, Meng-Lin,et al."Deciphering the mechanism of near-threshold J/psi photoproduction".EUROPEAN PHYSICAL JOURNAL C 80.11(2020):1053.

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来源：理论物理研究所

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