质子-质子相互作用中Lambda/Sigma0产生截面比的能量依赖性
核实验
2009-03-20 v1
摘要
在COSY-11设施内部，通过pp->pK+Lambda / Sigma0反应，在14至60 MeV的过剩能量范围内测量了Lambda和Sigma0超子的产生。数据覆盖了Lambda/Sigma0截面比从Q<=13 MeV时的约28到高水平约2.5的转变，显示在10至20 MeV过剩能量之间该比值的强烈下降。p-Sigma0通道中末态相互作用的影响似乎比p-Lambda通道小得多。给出了N-Lambda和N-Sigma系统的有效范围参数估计。
引用
@article{arxiv.nucl-ex/0402008,
title = {Energy dependence of the Lambda/Sigma0 production cross section ratio in proton proton interactions},
author = {P. Kowina and M. Wolke and H. -H. Adam and A. Budzanowski and R. Czyzykiewicz and D. Grzonka and J. Haidenbauer and M. Janusz and L. Jarczyk and B. Kamys and A. Khoukaz and K. Kilian and P. Moskal and W. Oelert and C. Piskor-Ignatowicz and J. Przerwa and C. Quentmeier and T. Rozek and R. Santo and G. Schepers and T. Sefzick and M. Siemaszko and J. Smyrski and S. Steltenkamp and A. Strzalkowski and A. Taschner and P. Winter and P. Wustner and W. Zipper},
journal= {arXiv preprint arXiv:nucl-ex/0402008},
year = {2009}
}
备注
6 pages, 6 figures, submitted to EPJA