J/ψ Production in Hard Diffractive γ-p Collision

YAN ZhanYuan; DUAN ChunGui; ZHANG YuMin; HE ZhenMin

Chinese Physics C> 2000, Vol. 24> Issue(10) : 915-921

J/ψ Production in Hard Diffractive γ-p Collision

Department of Physics,Hebei Teachers'University,Shijiazhuang 050016,China

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Abstract：
In the frame of color-octet mechanism and according to NRQCD factorization of q production,using three sets of parton distribution function of Pomeron given by L.ALvero et al.,the cross section of J/ψ in γ+p→p+J/ψ+X process is calculated and discussed with the s =200GeV,4GeVT<10GeV. Our results show that the NRQCD matrix elements had a great influence on cross sections,but a little influence on the ratio of diffractive cross section to inclusive cross section. If the influence is eliminated,the ratio is only related to the flux factor and parton distribution functions of Pomeron.

References

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YAN ZhanYuan, DUAN ChunGui, ZHANG YuMin and HE ZhenMin. J/ψ Production in Hard Diffractive γ-p Collision[J]. Chinese Physics C, 2000, 24(10): 915-921.

YAN ZhanYuan, DUAN ChunGui, ZHANG YuMin and HE ZhenMin. J/ψ Production in Hard Diffractive γ-p Collision[J]. Chinese Physics C, 2000, 24(10): 915-921. shu

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Received: 1999-07-06
Revised: 1900-01-01

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沈阳化工大学材料科学与工程学院沈阳 110142

J/ψ Production in Hard Diffractive γ-p Collision

Corresponding author: YAN ZhanYuan,

Department of Physics,Hebei Teachers'University,Shijiazhuang 050016,China

Received Date: 1999-07-06
Accepted Date: 1900-01-01
Available Online: 2000-10-05

Abstract: In the frame of color-octet mechanism and according to NRQCD factorization of q production,using three sets of parton distribution function of Pomeron given by L.ALvero et al.,the cross section of J/ψ in γ+p→p+J/ψ+X process is calculated and discussed with the s =200GeV,4GeVT<10GeV. Our results show that the NRQCD matrix elements had a great influence on cross sections,but a little influence on the ratio of diffractive cross section to inclusive cross section. If the influence is eliminated,the ratio is only related to the flux factor and parton distribution functions of Pomeron.