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"Table 45" of "Decomposing transverse momentum balance contributions for quenched jets in PbPb collisions at sqrt(s[NN]) = 2.76 TeV"

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Mendeley Data2024-05-10 更新2024-06-28 收录
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CERN-LHC. Decomposing transverse momentum balance contributions for quenched jets in PbPb collisions at 2.76 TeV with CMS Interactions between jets and the quark-gluon plasma produced in heavy ion collisions are studied via the angular distributions of summed charged-particle transverse momenta (pT) with respect to both the leading and subleading jet axes in high-pT dijet events. The contributions of charged particles in different momentum ranges to the overall event pT balance are decomposed into short-range jet peaks and a long-range azimuthal asymmetry in charged-particle pT. The results for PbPb collisions are compared to those in pp collisions using data collected in 2011 and 2013, at collision energy 2.76 TeV with integrated luminosities of 166 inverse microbarns and 5.3 inverse picobarns, respectively, by the CMS experiment at the LHC. Measurements are presented as functions of PbPb collision centrality, charged-particle pT, relative azimuth, and radial distance from the jet axis for balanced and unbalanced dijets. Dijet events are characterized by asymmetry parameter Aj = (pT1 - pT2)/(pT1 + pT2), where pT1 = transverse momentum of the leading (highest-pT) jet and pT2 = transverse momentum of the subleading (second-highest-pT) jet. The sample is divided into two asymmetry classes--more balanced dijets for which Aj < 0.22 (52% of the PbPb sample and 67% of the pp sample), and more unbalanced dijets for which Aj > 0.22.

欧洲核子研究中心大型强子对撞机(CERN-LHC)数据集:本研究聚焦于2.76 TeV铅铅(PbPb)碰撞中淬火喷注的横向动量平衡贡献分解,利用CMS实验(CMS),通过高横向动量双喷注事件(dijet events)中,相对于领头喷注与次领头喷注轴的总带电粒子横向动量(transverse momentum, pT)的角分布,研究重离子碰撞中产生的喷注与夸克胶子等离子体(quark-gluon plasma)之间的相互作用。本研究将不同动量区间内带电粒子对整体事件横向动量平衡的贡献,分解为短程喷注峰与带电粒子横向动量的长程方位角不对称性。利用大型强子对撞机(LHC)上的CMS实验采集的2011年与2013年数据,将碰撞能量为2.76 TeV的铅铅碰撞与质子质子(pp)碰撞结果进行对比,二者的积分亮度(integrated luminosities)分别为166 微靶恩⁻¹与5.3 皮靶恩⁻¹。针对平衡与非平衡双喷注,测量结果以铅铅碰撞中心度(collision centrality)、带电粒子横向动量、相对方位角(relative azimuth)以及喷注轴径向距离(radial distance)为函数形式呈现。双喷注事件通过不对称参数Aj(asymmetry parameter Aj)进行表征,公式为Aj = (pT1 - pT2)/(pT1 + pT2),其中pT1为领头喷注(最高横向动量喷注)的横向动量,pT2为次领头喷注(第二高横向动量喷注)的横向动量。数据集样本被划分为两类不对称性类别:Aj < 0.22的更平衡双喷注(占铅铅碰撞样本的52%、质子质子碰撞样本的67%),以及Aj > 0.22的更非平衡双喷注。

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2023-06-28
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