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arXiv 1107.1641hep-ex
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用ATLAS探测器测量在sqrt(s)=7 TeV时pp碰撞中附加中心喷流活动的否决的双喷流产生

Measurement of dijet production with a veto on additional central jet activity in pp collisions at sqrt(s)=7 TeV using the ATLAS detector

ATLAS Collaboration

摘要:

本文提出了一种双喷流系统快度区间内喷流活动的测量方法。如果在两个边界喷流之间发现横向动量大于20 GeV的喷流,则事件被否决。对于边界喷流,平均横向动量50 < pT(avg)< 500 GeV,在喷流否决中幸存下来的双射流事件的分数被提出,这些喷流被高达6个单位的快度分开。在双喷流系统所限定的快度区间内,平均多重喷流数高于否决标度,这也是一种量化微扰QCD发射的方法。的数据进行了比较,下一个领先的订单加上部分子簇射预测从POWHEG盒,一个所有的订单remmation使用HEJ计算和PYTHIA,HERWIG++和ALPGEN事件发生器。测量使用pp碰撞在sqrt(s)=7 TeV使用ATLAS探测器在2010年记录的数据进行。

英文摘要:

A measurement of jet activity in the rapidity interval bounded by a dijet system is presented. Events are vetoed if a jet with transverse momentum greater than 20 GeV is found between the two boundary jets. The fraction of dijet events that survive the jet veto is presented for boundary jets that are separated by up to six units of rapidity and with mean transverse momentum 50 < pT(avg) < 500 GeV. The mean multiplicity of jets above the veto scale in the rapidity interval bounded by the dijet system is also presented as an alternative method for quantifying perturbative QCD emission. The data are compared to a next-to-leading order plus parton shower prediction from the POWHEG-BOX, an all-order resummation using the HEJ calculation and the PYTHIA, HERWIG++ and ALPGEN event generators. The measurement was performed using pp collisions at sqrt(s)=7 TeV using data recorded by the ATLAS detector in 2010.

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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