Chinese Physics C > 2012, Vol. 36 > Issue(8): 697-702 DOI: 10.1088/1674-1137/36/8/003

Vector meson electroproduction in QCD

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Based on the generalized QCD vector meson dominance model, we study the electroproduction of a vector meson off a proton in the QCD inspired eikonalized model. Numerical calculations for the total cross section σ _totand differential cross section d σ/d tare performed for ρ, ω and φ meson electroproduction in this paper. Since gluons interact among themselves (self-interaction), two gluons can form a glueball with quantum numbers I ^G, J ^PC=0 ⁺,2 ⁺⁺, decay width Γ _t≈100 MeV, and mass of m _G=2.23 GeV. The three gluons can form a three-gluon colorless bound state with charge conjugation quantum number C=-1, called the Odderon. The mediators of interactions between projectiles (the quark and antiquark pair fluctuated from the virtual photon) and the proton target (a three-quark system) are the tensor glueball and the Odderon. Our calculated results in the tensor glueball and Odderon exchange model fit to the existing data successfully, which evidently shows that our present QCD mechanism is a good description of meson electroproduction off a proton. It should be emphasized that our mechanism is different from the theoretical framework of Block et al. We also believe that the present study and its success are important for the investigation of other vector meson electro- and photoproduction at high energies, as well as for searching for new particles such as tensor glueballs and Odderons, which have been predicted by QCD and the color glass condensate model (CGC). Therefore, in return, it can test the validity of QCD and the CGC model.

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LU Juan, CAI Xian-Hao and ZHOU Li-Juan. Vector meson electroproduction in QCD[J]. Chinese Physics C, 2012, 36(8): 697-702. doi: 10.1088/1674-1137/36/8/003

LU Juan, CAI Xian-Hao and ZHOU Li-Juan. Vector meson electroproduction in QCD[J]. Chinese Physics C, 2012, 36(8): 697-702. doi:10.1088/1674-1137/36/8/003 shu

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Received: 2011-10-25
Revised: 1900-01-01

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通讯作者:陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

Vector meson electroproduction in QCD

Corresponding author:LU Juan,

Received Date:2011-10-25

Accepted Date:1900-01-01

Available Online:2012-08-05

Abstract:Based on the generalized QCD vector meson dominance model, we study the electroproduction of a vector meson off a proton in the QCD inspired eikonalized model. Numerical calculations for the total cross sectionσ_totand differential cross section dσ/dtare performed for ρ, ω and φ meson electroproduction in this paper. Since gluons interact among themselves (self-interaction), two gluons can form a glueball with quantum numbers I^G,J^PC=0⁺,2⁺⁺, decay widthΓ_t≈100 MeV, and mass ofm_G=2.23 GeV. The three gluons can form a three-gluon colorless bound state with charge conjugation quantum numberC=-1, called the Odderon. The mediators of interactions between projectiles (the quark and antiquark pair fluctuated from the virtual photon) and the proton target (a three-quark system) are the tensor glueball and the Odderon. Our calculated results in the tensor glueball and Odderon exchange model fit to the existing data successfully, which evidently shows that our present QCD mechanism is a good description of meson electroproduction off a proton. It should be emphasized that our mechanism is different from the theoretical framework of Block et al. We also believe that the present study and its success are important for the investigation of other vector meson electro- and photoproduction at high energies, as well as for searching for new particles such as tensor glueballs and Odderons, which have been predicted by QCD and the color glass condensate model (CGC). Therefore, in return, it can test the validity of QCD and the CGC model.

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Vector meson electroproduction in QCD

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