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arXiv 0809.3605hep-ex
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在HERA上的包含衍射

Inclusive Diffraction at HERA

Paul Laycock

摘要:

H1和Zeus合作测量了包含衍射的DIS截面ep -> eXp,这些测量在归一化不确定性内具有良好的一致性。衍射部分子密度函数(DPDF)已被提取从NLO QCD适合包容性的测量衍射DIS和这些DPDF的预测相比,在DIS中的衍射dijets的测量,测试的有效性的因式分解近似在其提取中使用。H1然后使用DIS数据中的这些衍射dijet在组合QCD拟合中提供进一步的约束,导致下一代DPDF在大动量分数下约束衍射胶子。最后,DPDF的预测进行了比较,衍射dijets在光生强子的强子环境中的生存概率的问题可以研究。

英文摘要:

The H1 and Zeus collaborations have measured the inclusive diffractive DIS cross section ep -> eXp and these measurements are in good agreement within a normalisation uncertainty. Diffractive parton density functions (DPDFs) have been extracted from NLO QCD fits to inclusive measurements of diffractive DIS and the predictions of these DPDFs are compared with measurements of diffractive dijets in DIS, testing the validity of the factorisation approximations used in their extraction. H1 then use these diffractive dijets in DIS data to provide further constraints in a combined QCD fit, resulting in the next generation of DPDFs which have constrained the diffractive gluon at large momentum fractions. Finally, the predictions of DPDFs are compared to diffractive dijets in photoproduction where the issue of survival probability in a hadron-hadron environment can be studied.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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