论文标题
LHC Energies处PP碰撞中的颜色重新连接和HADRONC重新散射对底层事件的影响
Effect of color reconnection and hadronic re-scattering on underlying events in pp collisions at LHC energies
论文作者
论文摘要
基本事件在P $ -P碰撞中占主导地位，并从扰动到非扰动QCD跨越，其灵敏度从多尺度到非常低的X量表物理学不等。对此类事件的详细理解在对标准模型（）SM及超过标准模型物理学的准确理解中起着至关重要的作用。考虑到基本事件可观察到的基本事件，在Pythia 8 Monte Carlo模型的框架内研究了基本事件活动，这是指带电的粒子多重密度，$ \ langle d^{2} n /dηdηdϕ \ rangle $和平均值$ p_t $ p_t $ sum，$ \ langle d^unangle d^$ sum us $ $ \ sqrt {s} $ = 2.76、7和13 tev的p $ -p碰撞的朝向，远距离和横向区域的领先粒子的功能。相对于P $ -P碰撞中的领先粒子，在方位平面上定义了朝向，远距离和横向区域。还研究了基础事件及其在中央和正向区域的活动的能量依赖性。详细研究了在毕达西亚8中实施的望言重新分散，颜色重新分裂和绳索强调机制的影响，以洞悉导致软部门基础事件的不同过程。
Underlying events dominate most of the hadronic activity in p$-$p collisions and are spanned from perturbative to non-perturbative QCD, having a sensitivity ranging from the multi-scale to very low-x scale physics. A detailed understanding of such events plays a crucial role in the accurate understanding of Standard Model ()SM and Beyond Standard Model physics. The underlying event activities has been studied within the framework of Pythia 8 Monte Carlo model, considering the underlying events observables mean charged particle multiplicity density , $\langle d^{2}N /dηdϕ\rangle$ and mean scalar $p_T$ sum, $\langle d^{2} \sum p_{T} /dηdϕ\rangle$ as a function of leading charged particle in towards, away, and transverse region of p$-$p collisions at $\sqrt{s}$ = 2.76, 7 and 13 TeV. The towards, away, and transverse regions have been defined on an azimuthal plane relative to leading particle in p$-$p collisions. The energy dependence of underlying events and their activities in the central and forward region has also been studied. The effect of hadronic re-scattering, color reconnection, and rope hadronization mechanism implemented in Pythia 8 has been studied in details to gain insight into the different processes contributing to underlying events in soft sector.
