Inclusive J/ψ production in two-photon collisions at LEP

被引：0
|
作者：
Sokolov, AA [1 ]
机构：
[1] Protvino High Energy Phys Inst, Protvino 142284, Moscow, Russia
来源：
PHOTON 2001 | 2002年
关键词：
D O I：
10.1142/9789812777157_0022
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
Inclusive J/psi production in photon-photon collisions has been observed by the DELPHI collaboration at LEP II beam energies. A clean signal from the reaction gamma gamma -> J/psi + X is seen. Number of observed events, N(J/psi -> mu(+)mu(-)) 36 +/- 7 for the integrated luminosity 617 pb(-1), yielding a cross section of sigma(J/psi -> mu(+)mu(-)) = 25.2 +/- 10.2 pb. Based on a study of the event shapes of different types of gamma gamma processes in the PYTHIA program, we conclude that (74 +/- 22) % of the observed J/psi events arc due to the 'resolved' photons, the dominant contribution of which is evidently a single color-octet gluon within the photon.
引用
收藏
页码：113 / 116
页数：4
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