Abstract

The transverse hyperon polarization is self-analyzed in their weak decays and represents a sensitive tool to explore the dynamics of hadronic reactions and heavy-ion collisions. It was extensively studied in hadronic reactions, where it is directed along the normal to the scattering plane. In heavy-ion collisions this observable is expected to decrease due to randomization of the scattering on different nucleons. At the same time, there exist another observable, global hyperon polarization, which is directed along the normal to the reaction plane. It is emerging due to the presence of initial angular momentum in non-central heavy-ion collisions and is growing with decreasing energy. One of the goals of future MPD and BM@N experiments at NICA is to investigate these observables in heavy-ion collisions in the energy range of several GeV per nucleon. Here we present the study of transverse \(\Lambda \) polarization in inclusive production within the framework of the MPD experiment, performed via Monte Carlo simulation in order to analyze the sensitivity of the detector to these observables.

中文翻译：

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MPD Λ 极化的蒙特卡罗研究

摘要

横向超子极化在其弱衰变中进行自我分析，是探索强子反应和重离子碰撞动力学的敏感工具。它在强子反应中被广泛研究，其中它沿着散射平面的法线定向。在重离子碰撞中，由于不同核子上散射的随机化，预计这个可观察量会减少。同时，还存在另一个可观察到的全局超子极化，它沿反应平面的法线定向。它的出现是由于非中心重离子碰撞中初始角动量的存在，并且随着能量的减少而增长。NICA 未来 MPD 和 BM@N 实验的目标之一是在每个核子几个 GeV 的能量范围内研究重离子碰撞中的这些可观测值。\(\Lambda \)极化在 MPD 实验框架内的包容性生产中，通过蒙特卡罗模拟进行，以分析探测器对这些可观测值的灵敏度。