Strangeness S =-1 hyperon-nucleon scattering in covariant chiral effective field theory
Strangeness S =-1 hyperon-nucleon scattering in covariant chiral effective field theory
复制标题
协变手性有效场理论中的奇异性 S = ≤ 1 超子核散射
DOI：
10.1103/physrevd.94.014029
复制
发表时间：
2016
影响因子：
5
通讯作者：
Long Bingwei
中科院分区：
文献类型：
--
作者：
Li Kai-Wen;Ren Xiu-Lei;Geng Li-Sheng;Long Bingwei
受协变重子手征微扰理论在单重子系统和重-轻系统中的成功应用的启发，我们研究了超子-核子相互作用中相对论效应与奇异性的关系。在这一探索性工作中，我们遵循Epelbaum和Gegelia提出的协变框架计算了首阶散射振幅。通过对实验数据拟合五个低能常数，我们发现与重子方法相比，截止依赖性得到了缓解。尽管如此，实验数据的描述仍然是定量相似的领先秩序。
Motivated by the successes of covariant baryon chiral perturbation theory in one-baryon systems and in heavy-light systems, we study relevance of relativistic effects in hyperon-nucleon interactions with strangeness. In this exploratory work, we follow the covariant framework developed by Epelbaum and Gegelia to calculate thescattering amplitude at leading order. By fitting the five low-energy constants to the experimental data, we find that the cutoff dependence is mitigated, compared with the heavy-baryon approach. Nevertheless, the description of the experimental data remains quantitatively similar at leading order.