Meson Exchange Current and Three-Body Force Contributions to the 4He Charge Form Factor
Meson Exchange Current and Three-Body Force Contributions to the 4He Charge Form Factor
复制标题
介子交换电流和三体力对 4He 电荷形状因子的贡献
DOI：
10.1143/ptp.67.236
复制
发表时间：
1982
影响因子：
--
通讯作者：
Hajime Tanaka
中科院分区：
文献类型：
--
作者：
T. Katayama;Y. Akaishi;Hajime Tanaka
本文研究了介子交换电流对He的电荷形状因子和电荷密度的影响，包括对项、介子项和阻滞项。采用由核哈密顿量得到的实际波函数，考虑了三体力（3BF）的影响，其中核哈密顿量明确包含了2 π交换3BF.结果发现，3BF大大提高了MEC的贡献。当3BF被考虑在内，MEC的贡献被证明是消除理论和实验CFF的第二个最大值之间的大部分差异。由此产生的电荷密度的影响被发现在中心区域产生一个凹陷。
Effects of meson exchange current (MEC) on the charge form factor (CFF) and charge density of 'He are investigated, including pair, mesonic and retardation current terms. The influence of three· body force (3BF) is considered by adopting the realistic wave function obtained from the nuclear Hamiltonian which explicitly includes the two· pion exchange 3BF. As a result the 3BF is found to greatly enhance the MEC contribution. When the 3BF is taken into account, the MEC contribution is shown to remove most of the discrepancy between the theoretical and experimental CFF's at the second maximum. Resulting effects on the charge density are found to yield a depression in the central region.