Measurement of dijet cross sections with leading neutrons in photoproduction at HERA

被引：0
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作者：
Bunyatyan, A [1 ]
机构：
[1] Max Planck Inst Kernphys, D-69117 Heidelberg, Germany
来源：
PHOTON 2000 | 2001年 / 571卷
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中图分类号：
O412 [相对论、场论]; O572.2 [粒子物理学];
学科分类号：
摘要：
An analysis is presented of dijets in photoproduction at the ep collider HERA where a leading neutron with an energy E-n > 400 GeV and angle theta(n) < 0.8 mrad with respect to the proton direction is detected. The average photon-proton center-of-mass energy is about 200 GeV. Mechanism of leading neutron production is studied. The differential cross sections are measured as function of jet transverse energy and pseudorapidity, the fraction of the photon momenta entering the hard scattering, x,, and x, interpreted as the fraction of pion momenta in a model where the interaction proceeds via exchange of a pion. The Monte Carlo predictions based on standard photoproduction processes and those based on the one-pion-exchange model, using different parameterizations for the pion structure function, are compared to the measurements.
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页码：231 / 236
页数：6
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