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arXiv 1301.6872hep-ex
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用ATLAS探测器测量sqrt(s)=7 TeV时W->lv+ 2喷流事件中的硬双部分子相互作用

Measurement of hard double-parton interactions in W->lv+ 2 jet events at sqrt(s)=7 TeV with the ATLAS detector

ATLAS Collaboration

摘要:

本文利用大型强子对撞机(LHC)ATLAS探测器收集的积分亮度为36/pb的数据,分析了在质量中心能量为7 TeV的质子-质子碰撞中,伴随两个喷流产生的W玻色子是否存在双部分子相互作用。通过两个喷流之间的动量平衡测量了由双部分子相互作用引起的事件的分数fDP(D),其值为fDP(D)= 0.08 +- 0.01(统计)。对于横向动量PT > 20 GeV且快度|y| <2.8的喷流,+- 0.02(sys)。这对应于对σ_eff = 15 +-3(stat.)+5 -3(系统)MB.

英文摘要:

The production of W bosons in association with two jets in proton-proton collisions at a centre-of-mass energy of sqrt(s)=7 TeV has been analysed for the presence of double-parton interactions using data corresponding to an integrated luminosity of 36/pb, collected with the ATLAS detector at the LHC. The fraction of events arising from double-parton interactions, fDP(D) has been measured through the momentum balance between the two jets and amounts to fDP(D) = 0.08 +- 0.01 (stat.) +- 0.02 (sys) for jets with transverse momentum PT > 20 GeV and rapidity |y|<2.8. This corresponds to a measurement of the effective area parameter for hard double-parton interactions of σ_eff = 15 +- 3 (stat.) +5 -3 (sys.) mb.

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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