Jet and photon physics at DØ

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• 作者：Zielinski ; Marek
• 刊名：Nuclear Physics B - Proceedings Supplements
• 出版年：2003
• 期刊代码：46_09205632
• 类别：ph
• 出版时间：April, 2003
• 卷：117
• 期：Supplement
• 页码：312-315
• 文件大小：1.48 M

摘要

We report several new DØ measurements related to issues in QCD. Because of its large reach in x-Q² and due to a thorough analysis of correlated systematic errors, the rapidity-dependent inclusive jet cross section has had a significant impact on the extraction of parton distribution functions. The ratios of jet and photon production at √s = 1800 and 630 GeV, although in general agreement with theory, indicate that not all aspects of these processes are fully understood. Studies of multiple jet production at moderate and low E_T values have provided means to explore QCD scales and to tune the related aspects of event generators. A definitive signal for diffractive production of W bosons has been established, providing a new probe of the quark structure of the Pomeron. And, following on a great effort to bring up the experiment after a long shut-down and extensive upgrades, DØ is accumulating and analyzing new data at 2 TeV. The preliminary results for inclusive jet p_T and dijet mass spectra are just the first steps in exploiting the opportunities that Run II of the Tevatron will provide.