论文标题
CMS Pythia 8彩色重新连接基于基本事件数据
CMS PYTHIA 8 colour reconnection tunes based on underlying-event data
论文作者
论文摘要
在Pythia 8事件生成器中实现的两个颜色重新连接模型的新的参数调音，量子染色体动力学启发和Gluon-Move，是基于默认的CMS Pythia 8的基础pythia 8的基础曲调，CP5。对CMS实验在质量中心能量上进行的基础事件敏感的测量值$ \ sqrt {s} $ = 7和13 TEV，并且通过1.96 TEV的CDF实验来限制颜色重新连接模型的参数，并同时互动。将新的颜色重新连接调子与1.96、7、8和13 TEV的各种测量值进行了比较，包括对基础事件的测量，奇怪的粒子多重性，喷气子结构可观察结果，喷气形状，喷射形状和颜色流量（$ \ MATHRM {t \ bar {t \ bar {t}}} $）。新的曲调还用于估计与$ \ mathrm {t \ bar {t}} $事件的衰减产物在13 tev的半缩合通道中的衰减产物中与颜色重新连接建模相关的不确定性。
New sets of parameter tunes for two of the colour reconnection models, quantum chromodynamics-inspired and gluon-move, implemented in the PYTHIA 8 event generator, are obtained based on the default CMS PYTHIA 8 underlying-event tune, CP5. Measurements sensitive to the underlying event performed by the CMS experiment at centre-of-mass energies $\sqrt{s}$ = 7 and 13 TeV, and by the CDF experiment at 1.96 TeV are used to constrain the parameters of colour reconnection models and multiple-parton interactions simultaneously. The new colour reconnection tunes are compared with various measurements at 1.96, 7, 8, and 13 TeV including measurements of the underlying-event, strange-particle multiplicities, jet substructure observables, jet shapes, and colour flow in top quark pair ($\mathrm{t\bar{t}}$) events. The new tunes are also used to estimate the uncertainty related to colour reconnection modelling in the top quark mass measurement using the decay products of $\mathrm{t\bar{t}}$ events in the semileptonic channel at 13 TeV.
