HERA photoproduction中高质量双喷射子截面
摘要
Dijet differential cross sections for the reaction e+p -> e+ + jet + jet + X in the photoproduction regime have been measured with the ZEUS detector at HERA using an integrated luminosity of 42.7 pb**{-1}. The cross sections are given for photon-proton centre-of-mass energies in the range 134< W <277 GeV. The differential cross sections as a function of the dijet mass, Mjj, and of the dijet angular variables have been measured for 47 < Mjj < 160 GeV and compared to next-to-leading-order QCD calculations. The dijet events in the region 75< Mjj < 100 GeV have been used to derive a 95% C.L. upper limit on the cross section for Z0 photoproduction of sigma(e+ p -> e+ Z0 X} < 5.9 pb. Upper limits on the photoproduction of new heavy resonances decaying into two jets are also presented for masses in the range between 60 GeV and 155 GeV.
引用
@article{arxiv.hep-ex/0112030,
title = {High-mass dijet cross sections in photoproduction at HERA},
author = {ZEUS Collaboration},
journal= {arXiv preprint arXiv:hep-ex/0112030},
year = {2012}
}
备注
29 pages, 5 figures, to be submitted to Phys. Lett. B