标题： 一个小系统精确四动量守恒的软-硬框架 显示英文标题

标题： A soft-hard framework with exact four momentum conservation for small systems

摘要： 一个新的框架，称为x-scape，用于高能质子-质子（$p$-$p$）和质子-核（$p$-$A$）碰撞中硬和软横向动量区的联合研究。 使用3d-Glauber模型设置了动态初始状态，其中每个入射核子内的热点的横向位置被确定。 使用Pythia生成器执行从两个碰撞热点发出的硬散射。 来自入射硬部分子的初态辐射在名为I-matter的新模块中进行，该模块包括初始分裂的纵向位置。 初始硬部分子及其相关束流残留物的能量-动量从热点中移除，减少了用于形成整体介质的能量-动量。 使用matter生成器模拟了出射喷注，并分别展示了允许和不允许能量损失的情况的结果。 首先将这种硬软模型与来自$p$-$p$和最小横截面$p$-$Pb$碰撞的单个包括强子和喷注数据进行了比较。 使用$p$-$p$的单个强子谱进行有限（参数数量）的贝叶斯校准。 与数据的公平比较表明了这一新框架的实用性。 对喷注$p_T$与中 rapidity 和前向 rapidity 处事件活动之间相关性的理论研究正在进行。 显示英文摘要

摘要： A new framework, called x-scape, for the combined study of both hard and soft transverse momentum sectors in high energy proton-proton ($p$-$p$) and proton-nucleus ($p$-$A$) collisions is set up. A dynamical initial state is set up using the 3d-Glauber model with transverse locations of hotspots within each incoming nucleon. A hard scattering that emanates from two colliding hotspots is carried out using the Pythia generator. Initial state radiation from the incoming hard partons is carried out in a new module called I-matter, which includes the longitudinal location of initial splits. The energy-momentum of both the initial hard partons and their associated beam remnants is removed from the hot spots, depleting the energy-momentum available for the formation of the bulk medium. Outgoing showers are simulated using the matter generator, and results are presented for both cases, allowing for and not allowing for energy loss. First comparisons between this hard-soft model and single inclusive hadron and jet data from $p$-$p$ and minimum bias $p$-$Pb$ collisions are presented. Single hadron spectra in $p$-$p$ are used to carry out a limited (in number of parameters) Bayesian calibration of the model. Fair comparisons with data are indicative of the utility of this new framework. Theoretical studies of the correlation between jet $p_T$ and event activity at mid and forward rapidity are carried out.