论文标题
Laurent+Pietarinen部分波分析
Laurent+Pietarinen Partial Wave Analysis
论文作者
论文摘要
与任何特定的微观理论无关的新型能量依赖性拟合策略应用于KAON光生生产数据，其质量中心能量范围从1625 MeV到2296 MEV。实验数据是根据修改后的月桂膨胀（Laurent+Pietarinen膨胀）拟合的，该膨胀（Laurent+Pietarinen膨胀）以前已成功地应用于多物。目前的目的是直接从数据中提取共振极参数，而不是从多物的集合中提取共振参数。然后使用受约束的单能拟合来搜索缺失的结构。在此原理研究中，数据由初始L+P拟合很好地描述，并且表明只有一个适量的结构（主要是在较高的多物中）由于原始拟合而缺少。通过实现一种相位限制的形式，通过实现一种形式，通过使用多通道分析来固定拟合参数的初始值，从而减轻了困扰单通道多极分析的整体阶段引起的问题。
A new energy-dependent fit strategy, independent of any specific microscopic theory, is applied to kaon photoproduction data with center-of-mass energies ranging from 1625 MeV to 2296 MeV. Experimental data are fitted in terms of a modified Laurent expansion (Laurent+Pietarinen expansion) which previously has been successfully applied to multipoles. The present aim is to extract resonance pole parameters directly from the data, rather than from sets of multipoles. A constrained single-energy fit is then used to search for missing structures. In this proof-of-principle study, the data are well-described by the initial L+P fit, and it is shown that only a moderate amount of structure, mostly in higher multipoles, is missing from the original fit. Problems due to an unmeasurable overall phase, plaguing single-channel multipole analyses, are mitigated by implementing a form of phase limitation, fixing the initial values of fit parameters using a multi-channel analysis.
