Xi hyperons in the nuclear medium described by chiral NLO interactions
Xi hyperons in the nuclear medium described by chiral NLO interactions
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手性 NLO 相互作用描述的核介质中的 Xi 超子
DOI：
10.1103/physrevc.100.024313
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发表时间：
2019
影响因子：
3.1
通讯作者：
M. Kohno
中科院分区：
文献类型：
--
作者：
丸山智幸;早川岳人;梶野敏貴;Akihiro Shibata;M. Kohno
通过计算对称核物质中的单粒子势，在次领先阶（NLO）水平上研究了手征有效场论奇异扇区中重子-重子相互作用的性质。通过局域密度近似和高斯形状因子的卷积，将计算结果转化为有限核中的势，以模拟有限程效应。当能量较低时，中心区域的势是排斥的，而表面区域的势是吸引的。吸引口袋可以降低原子态。用半经典扭曲波方法计算了和上的产生过程谱，得到的结合能与日本高能物理国家实验室（KEK）的乳胶实验结果一致。截面的绝对值得到了很好的再现，但峰位于比实验数据低的能量位置。的计算光谱的KEK最近进行的新的实验结果进行了比较，比以前更好的分辨率。这种比较对于提高相互作用的理解是有价值的，其参数化仍然有很大的不确定性。
Properties of the baryon-baryon interactions in the strangenesssector of chiral effective field theory at the next-to-leading order (NLO) level are explored by calculatingsingle-particle potentials in symmetric nuclear matter. The results are transformed to thepotential in finite nuclei by a local-density approximation with convolution by a Gaussian form factor to simulate finite-range effects. Thepotential is repulsive in a central region, and attractive in a surface area when theenergy is low. The attractive pocket can lower theandatomic states. The obtained binding energies inandare found to be conformable with those found in emulsion experiments at Japan's National Laboratory for High Energy Physics (KEK).spectra ofproduction inclusive processes onandare also evaluated, using a semiclassical distorted wave method. The absolute values of the cross section are properly reproduced for, but the peak locates at a lower energy position than that of the experimental data. The calculated spectrum ofshould be compared with the forthcoming result from the new experiments recently carried out at KEK with better resolution than before. The comparison would be valuable to improve the understanding of theinteraction, the parametrization of which has still large uncertainties.