Model dependence of single-energy fits to pion photoproduction data
Model dependence of single-energy fits to pion photoproduction data
复制标题
单能量的模型依赖性适合π介子光生产数据
DOI：
10.1140/epja/i2011-11143-y
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发表时间：
2011
期刊：
影响因子：
--
通讯作者：
S. Kamalov
中科院分区：
文献类型：
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作者：
R. Workman;Mark Wayne Paris;W. Briscoe;L. Tiator;S. Schumann;M. Ostrick;S. Kamalov
通过对介子产光数据的能量依赖和单能量拟合，探讨了多极分析的模型依赖性。MAID依赖于能量的解决方案被用作生成真实伪数据的事件生成器的输入。这些是使用SAID参数化方法拟合的，以确定在200至1200MeV的实验室光子能量范围内的单能量和能量依赖解。所得到的解与MAID的输入振幅一致。一般来说，每个数据的拟合值为1或更小。我们讨论了预期结果一致的能量区域，并探讨了拟合对包括单偏振和双偏振观测值的数量的敏感性。详细考察了沃森定理的影响。
Model dependence of multipole analysis has been explored through energy-dependent and single-energy fits to pion photoproduction data. The MAID energy-dependent solution has been used as input for an event generator producing realistic pseudo data. These were fitted using the SAID parametrization approach to determine single-energy and energy-dependent solutions over a range of lab photon energies from 200 to 1200MeV. The resulting solutions were found to be consistent with the input amplitudes from MAID. Fits with a χ-squared per datum of unity or less were generally achieved. We discuss energy regions where consistent results are expected, and explore the sensitivity of fits to the number of included single- and double-polarization observables. The influence of Watson’s theorem is examined in detail.