Chiral three-nucleon forces from p-wave pion production.
Chiral three-nucleon forces from p-wave pion production.
复制标题
来自 p 波介子产生的手性三核力。
DOI：
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发表时间：
2000
影响因子：
8.6
通讯作者：
G. Miller
中科院分区：
文献类型：
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作者：
C. Hanhart;van Kolck U;G. Miller
根据一种体现手征对称性约束的改进的功率计数，研究了核子-核子碰撞中的p波介子的产生。计算了前两个非零阶的贡献。我们发现pp-->；pppi(0)的自旋三重态截面在没有自由参数的情况下有合理的收敛，并与数据吻合。与pp-->；pnpi(+)中自旋单态截面的现有数据相一致，限制了最近显示的对三核子势有显著贡献的短程算符。
Production of p-wave pions in nucleon-nucleon collisions is studied according to an improved power counting that embodies the constraints of chiral symmetry. Contributions from the first two nonvanishing orders are calculated. We find reasonable convergence and agreement with data for a spin-triplet cross section in pp-->pppi(0), with no free parameters. Agreement with existing data for a spin-singlet cross section in pp-->pnpi(+) constrains a short-range operator shown recently to contribute significantly to the three-nucleon potential.