Exclusive photoproduction of J/ψ mesons at HERA

被引：0
|
作者：
Savin, AA [1 ]
机构：
[1] DESY, D-2000 Hamburg, Germany
来源：
PHOTON 2000 | 2001年 / 571卷
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暂无
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：
The exclusive photoproduction of J/psi mesons, gammap --> J/psip, has been studied in ep collisions with the ZEUS and HI detectors at HERA using the e(+)e(-) and mu(+)mu(-) decay modes. The total cross section has been measured as a function of the photon-proton centre-of-mass energy, W, in the kinematic range 20 less than or equal to W less than or equal to 290 GeV for ZEUS and 26 less than or equal to W less than or equal to 285 GeV for HI. The differential cross section dsigma/dt, where t is the squared four-momentum at the proton vertex, has been measured. The Pomeron trajectory has been determined.
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页码：299 / 304
页数：6
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