Two-Jet Production via Resolved Photon Processes at HERA

Li Yunde; liu lianshou

Chinese Physics C> 1996, Vol. 20> Issue(7) : 601-609

Two-Jet Production via Resolved Photon Processes at HERA

Li Yunde ^, ,
liu lianshou

Institute of Particle Physics, Hua Zhao Normal University, Wuhan 430070

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Abstract：
Numerical reasults are presented for the photoproduction of twojets via resolved quasi-real photons at HERA in next-to-leading order(NLO) QCD. It shows that the NLO contribution is about a factor of 0.5 to 1 of the LO contribution. This may provide an explanation to the ZEUS results: "the LO QCD results is below data a factor of 1.5 to 2". When the invariant mass of two-jet system is not too large, say less than 30GeV, the cross section is dominated by the photon gluon distributionin.This may be used to measure the gluon structure of photon. When the invariant mass of two-jet system is larger, say than 30GeV, the cross section is dominated by the photon quark distributionin. This may be used to measure the quark structure of photon.

References

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ZEUSCollab.,M.Derrick et al,DESY 95-033[2]HICollab,TAhmed et al,DESY 95-062.[3]D Bdeker,Phys.Lett,B209（1992）164;M.Greco.A.Vicini,Nucl.Phys,B415（1994）386:G.Kramer,S.G Slesh,Z Phys,C61（1994）277.D Bdker,G Klamer,S.G Slesh,Z.Phys.,C63（1994）471[4]D Bdeker,Z.Phys.,C59（1993）501.[5]S.D Ellis,Z Kunszt,D.E.Soper,Phys.Rev.,D40（1989）2188.[6]Z.Kunszt D E Soper,Phys.Rev.,D46（1992）192.[7]M.Gluck,E Reya,A.Vogt,Phys.Rev.,D46（1992）1973.[8]M.Gluck,E Reya,A.Vogt,Z.Phys.,C53（1992）27.

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Li Yunde and liu lianshou. Two-Jet Production via Resolved Photon Processes at HERA[J]. Chinese Physics C, 1996, 20(7): 601-609.

Li Yunde and liu lianshou. Two-Jet Production via Resolved Photon Processes at HERA[J]. Chinese Physics C, 1996, 20(7): 601-609. shu

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Received: 1900-01-01
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

Two-Jet Production via Resolved Photon Processes at HERA

Li Yunde ^,
liu lianshou

Corresponding author: Li Yunde,

Institute of Particle Physics, Hua Zhao Normal University, Wuhan 430070

Received Date: 1900-01-01
Accepted Date: 1900-01-01
Available Online: 1996-07-05

Abstract: Numerical reasults are presented for the photoproduction of twojets via resolved quasi-real photons at HERA in next-to-leading order(NLO) QCD. It shows that the NLO contribution is about a factor of 0.5 to 1 of the LO contribution. This may provide an explanation to the ZEUS results: "the LO QCD results is below data a factor of 1.5 to 2". When the invariant mass of two-jet system is not too large, say less than 30GeV, the cross section is dominated by the photon gluon distributionin.This may be used to measure the gluon structure of photon. When the invariant mass of two-jet system is larger, say than 30GeV, the cross section is dominated by the photon quark distributionin. This may be used to measure the quark structure of photon.