On the scattering length of the K- d system
On the scattering length of the K- d system
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DOI：
10.1142/s0217751x07035379
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发表时间：
2007-01-30
影响因子：
1.6
通讯作者：
Gal, Avraham
中科院分区：
文献类型：
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作者：
Gal, Avraham
对 K(-)d 散射长度的 Faddeev 计算的多重散射近似进行了回顾，并与已发表的 (K) over bar N N- pi Y N 全反应性 Faddeev 计算进行了比较。提出了一种新的多重散射近似，它超越了核子的“固定中心”假设，目标精度为 5-10%。由 DEAR/SIDDHARTA 合作计划的 K(-)d 1s 原子能级位移和宽度测量得到的 K(-)d 散射长度的精确值，加上通过改进 K(-)p 原子测量得到的 K(-)p 散射长度的精确值，对于提取 K(-)n 散射长度、解决低能 (K) 超巴 N 现象学中的持久难题以及外推至 (K) 超巴至关重要-核系统。
Multiple- scattering approximations to Faddeev calculations of the K(-)d scattering length are reviewed and compared with published (K) over bar N N- pi Y N fully reactive Faddeev calculations. A new multiple-scattering approximation which goes beyond the 'fixed-center' assumption for the nucleons is proposed, aiming at accuracies of 5-10%. A precise value of the K(-)d scattering length from the measurement of the K(-)d 1s atomic level shift and width, planned by the DEAR/SIDDHARTA collaboration, plus a precise value for the K(-)p scattering length by improving the K(-)p atom measurements, are essential for extracting the K(-)n scattering length, for resolving persistent puzzles in low-energy (K) over bar N phenomenology and for extrapolating into (K) over bar -nuclear systems.