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Measurement of the inclusive di-jet cross section in photoproduction and determination of an effective parton distribution in the photon

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Abstract

The double-differential inclusive di-jet cross section in photoproduction processes is measured with the H1 detector at HERA. The cross section is determined as a function of the average transverse jet energyE jetsT for ranges of the fractional energyξ jetsγ of the parton from the photon side. An effective leading order parton distribution in the photon is determined at large parton fractional energies for scale between 80 <p 2T < 1250 GeV2. The measurement is compatible with the logarithmic scale dependence that is predicted by perturbative QCD.

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Supported by the Bundesministerium für Bildung, Wischenschaft, Forschung und Technologie, FRG, under contract numbers 7AC17P, 7AC17P, 7DO55P, 7HH171, 7HH27P, 7HD17P, 7HD27P, 7KI171, 6MP17I and 7WT87P

Supported by the UK Particle Physics and Astronomy Research Council, and formerly by the UK Science and Engineering Research Council

Supported by FNRS-NFWO, IISN-IIKW

Partially supported by the Polish State Committee for Scientific Research, grant no. 2P03B 055 13

Supported in part by USDOE grant DE F603 91ER40674

Supported by the Deutsche Forschungsgemeinschaft

Supported by the Swedish Natural Science Research Council

Supported by GA ČR grant no. 202/96/0214, GA AV Čr grant no. A1010619 and GA UK grant no. 177

Supported by the Swiss National Science Foundation

Supported by VEGA Sr grant no. 2/1325/96

Supported by Russian Foundation for Basic Researches grant no. 96-02-00019

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H1 Collaboration., Adloff, C., Aid, S. et al. Measurement of the inclusive di-jet cross section in photoproduction and determination of an effective parton distribution in the photon. Eur. Phys. J. C 1, 97–107 (1998). https://doi.org/10.1007/BF01245800

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  • DOI: https://doi.org/10.1007/BF01245800

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