ITP OpenIR  > SCI期刊论文
Du, Meng-Lin; Baru, Vadim2,3; Guo, Feng-Kun; Hanhart, Christoph; Meissner, Ulf-G; Nefediev, Alexey3,9,10; Strakovsky, Igor11
Deciphering the mechanism of near-threshold J/psi photoproduction
AbstractThe 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.
Cooperation Status国际
Subject AreaPhysics
MOST Discipline CataloguePhysics, Particles & Fields
Indexed BySCIE
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Document Type期刊论文
Affiliation1.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
11.Natl Res Nucl Univ MEPhI, Kashirskoe Highway 31, Moscow 115409, Russia
12.George Washington Univ, Inst Nucl Studies, Dept Phys, Washington, DC 20052 USA
Recommended Citation
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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