Advancing the Optical Potential Developments to Guide the Future Experimental Research

近年来，人们对远不稳定的核系统越来越感兴趣。由于有可能发现新的和意想不到的现象，人们越来越多地致力于研究这类系统。随着GSI的FAIR， GANIL的SPIRAL2和LNL的spe等即将到来的奇异核设施的建立，核子-核弹性散射代表了探索这些系统性质的自然方法。在这种情况下，光势框架起着核心作用，使我们能够进行预测，以指导和分析未来的实验研究。即使通常首选现象学方法，由于输入所需的自由参数而缺乏预测能力，使我们无法提供可靠的预测。因此，光势的微观方法代表了进行此类预测和评估不可避免的近似影响的首选方法，为反应过程提供了清晰的物理解释。该项目的目标是从手性微扰理论中衍生的核子间相互作用开始发展微观光学势，手性微扰理论是低能量子色动力学的有效场论。这个框架提供了一个理想的起点，使我们能够一致地推导出由相同原理和对称性连接的两核子和三核子相互作用。这样的相互作用被用作计算光势的唯一输入，它完全不受现象学的影响，并提供了更高的预测能力。

Recent years experienced an increasing interest for nuclear systems far from stability. The possibility of finding new and unexpected phenomena resulted in an increasing experimental effort devoted to investigating such systems. With the upcoming facilities for exotic nuclei, such as FAIR at GSI, SPIRAL2 at GANIL, and SPES at LNL, the nucleon-nucleus elastic scattering represents a natural way to explore the properties of these systems. In this context, the optical potential framework plays a central role and allows us to perform predictions to guide and analyse the future experimental research. Even if a phenomenological approach is usually preferred, the lack of predicting power due to the free parameters required in input, prevents us from providing reliable predictions. Thus, a microscopic approach to the optical potential represents the preferred way to make such predictions and assess the impact of unavoidable approximations, offering a clear physical interpretation of the reaction process. The goal of the project is to develop a microscopic optical potential starting from inter-nucleon interactions derived within the Chiral Perturbation Theory, which is the effective field theory of low-energy Quantum Chromo Dynamics. This framework offers the ideal starting point, allowing us to consistently derive two- and three-nucleon interactions that are connected by the same principles and symmetries. Such interactions are then used as the only input for the calculation of the optical potential, which is completely free from phenomenology and offers a higher predictive power.