Measurement of differential production cross-sections for a Z boson in association with b-jets in 7 TeV proton-proton collisions with the ATLAS detector
Measurement of differential production cross-sections for a Z boson in association with b-jets in 7 TeV proton-proton collisions with the ATLAS detector
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DOI：
10.1007/jhep10(2014)141
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发表时间：
2014-10-24
影响因子：
5.4
通讯作者：
Zwalinski, L.
中科院分区：
文献类型：
--
作者：
Aad, G.;Abbott, B.;Zwalinski, L.
本文报道了在根s = 7 TeV的pp碰撞中与b喷注有关的Z玻色子微分产生截面的测量结果。分析的数据对应于在大型强子对撞机上用ATLAS探测器记录的4.6 fb（-1）的积分光度。粒子级的横截面确定的事件与Z玻色子衰变成电子或μ子对，并包含b-射流。对于至少有一个b-jet的事件，横截面被呈现为Z玻色子横向动量和快度的函数，连同包含的b-jet横截面作为b-jet横向动量、快度和b-jet与Z玻色子之间的角间距的函数。对于至少有两个b-喷流的事件，截面被确定为两个最高横向动量b-喷流的不变质量和角间距的函数，以及Z玻色子横向动量和快度的函数。结果进行了比较，领导秩序和下一个领导秩序微扰QCD计算。
Measurements of differential production cross-sections of a Z boson in association with b-jets in pp collisions at root s = 7 TeV are reported. The data analysed correspond to an integrated luminosity of 4.6 fb(-1) recorded with the ATLAS detector at the Large Hadron Collider. Particle-level cross-sections are determined for events with a Z boson decaying into an electron or muon pair, and containing b-jets. For events with at least one b-jet, the cross-section is presented as a function of the Z boson transverse momentum and rapidity, together with the inclusive b-jet cross-section as a function of b-jet transverse momentum, rapidity and angular separations between the b-jet and the Z boson. For events with at least two b-jets, the cross-section is determined as a function of the invariant mass and angular separation of the two highest transverse momentum b-jets, and as a function of the Z boson transverse momentum and rapidity. Results are compared to leading-order and next-to-leading-order perturbative QCD calculations.