Measurement of hard double-parton interactions in W(→lν) + 2-jet events at √s=7 TeV with the ATLAS detector
Measurement of hard double-parton interactions in W(→lν) + 2-jet events at √s=7 TeV with the ATLAS detector
复制标题
使用 ATLAS 探测器测量 √s=7 TeV 下 W(→lν) + 2 射流事件中的硬双部分子相互作用
DOI：
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发表时间：
2013
期刊：
影响因子：
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通讯作者：
P. D. Nooij
中科院分区：
文献类型：
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作者：
G. J. Bos;K. Boterenbrood;H. Colijn;A. P. D. Jong;P. D. Nooij
利用大型强子对撞机ATLAS探测器收集的积分光度为36 pb的数据，分析了在质心能量为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。通过两个喷注之间的pT平衡测量了由双部分子相互作用引起的事件的分数f（D）DP，其值为f（D）DP = 0.08 ± 0.01（stat）。± 0.02（系统）对于横向动量pT > 20 GeV且快度|y| < 2.8。这对应于硬双部分子相互作用的有效面积参数σeff = 15 ± 3（stat.）+5 −3（系统）MB. New Journal of Physics 15（2013）033038 1367-2630/13/033038+39$33.00 © CERN 2013 for the benefit of the ATLAS Collaboration，published under the terms of the Creative Commons Attribution 3.0 license by IOP Publishing Ltd and Deutsche Physikalische Gesellschaft.本作品的任何进一步分发必须保持作者和已发表文章的标题，期刊引用和DOI的归属。
The production of W bosons in association with two jets in proton–proton collisions at a centre-of-mass energy of √ 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 Large Hadron Collider. The fraction of events arising from double-parton interactions, f (D) DP , has been measured through the pT balance between the two jets and amounts to f (D) DP = 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 σeff = 15 ± 3 (stat.) +5 −3 (sys.) mb. New Journal of Physics 15 (2013) 033038 1367-2630/13/033038+39$33.00 © CERN 2013 for the benefit of the ATLAS Collaboration, published under the terms of the Creative Commons Attribution 3.0 licence by IOP Publishing Ltd and Deutsche Physikalische Gesellschaft. Any further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation and DOI.