Measurement of differential cross sections for Σ+p elastic scattering in the momentum range 0.44-0.80 GeV/c
Measurement of differential cross sections for Σ+p elastic scattering in the momentum range 0.44-0.80 GeV/c
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动量范围 0.44-0.80 GeV/c 内 Σ+p 弹性散射的微分截面测量
DOI：
10.1093/ptep/ptac101
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发表时间：
2022
影响因子：
3.5
通讯作者：
K. Yohimura
中科院分区：
文献类型：
--
作者：
T. Nanamura;K. Miwa;...;T. Gogami;T. K. Harada;K. Yohimura
我们在J-Parc强子实验装置上进行了一个新颖的Σ+粒子散射实验。在Σ+动量为0.44-0.80GeV/c的范围内，从4.9×107个标记的Σ+粒子中识别出约2400个Σ+超弹性散射事件，得到了 +超弹性散射的微分截面，其精度比以往的实验高得多。得到的微分截面约为2 mb/sr或更小，并不像基于夸克团簇模型的fss_2和fss模型所预测的那样大。通过对获得的微分截面进行相移分析，我们首次实验得出了3S1和1P1通道的相移。由于夸克之间的泡利效应，3S1通道的相移被估算为：如果假设的符号为负，则该通道中的相互作用是适度排斥的，正如Nijmegen扩展排序核心模型所预测的那样。
We performed a novel Σ+pscattering experiment at the J-PARC Hadron Experimental Facility. Approximately 2400 Σ+pelastic scattering events were identified from 4.9 × 107tagged Σ+particles in the Σ+momentum range 0.44–0.80 GeV/c. The differential cross sections of the Σ+pelastic scattering were derived with much better precision than in previous experiments. The obtained differential cross sections were approximately 2 mb/sr or less, which were not as large as those predicted by the fss2 and FSS models based on the quark cluster model in the short-range region. By performing phase-shift analyses for the obtained differential cross sections, we experimentally derived the phase shifts of the3S1and1P1channels for the first time. The phase shift of the3S1channel, where a large repulsive core was predicted owing to the Pauli effect between quarks, was evaluated as. If the sign ofis assumed to be negative, the interaction in this channel is moderately repulsive, as the Nijmegen extended-sort-core models predicted.