非介子弱衰变中 5_Lambda-He 和 12_Lambda-C 超核的中子-质子及中子-中子对撞时间测量
核实验
2009-11-10 v1
摘要
我们首次测量了通过 (pi^+,K^+) 反应产生的 5_Lambda-He 和 12_Lambda-C 超核的非介子弱衰变过程中中子-质子对和中子-中子对的产额。我们在两个超核的关联谱中观察到了干净的背对背 np- 和 nn-对关联。背对背对产额比 Nnn/Nnp 必须接近衰变中中子-质子衰变宽度比 Gn(Lambda n -> nn)/Gp(Lambda p -> np)。每个超核获得的比值支持基于短程相互作用的近期计算。
引用
@article{arxiv.nucl-ex/0411018,
title = {Nucleon-nucleon coincidence measurement in the non-mesonic weak decay of 5_Lambda-He and 12_Lambda-C hypernuclei},
author = {S. Okada and S. Ajimura and K. Aoki and A. Banu and H. C. Bhang and T. Fukuda and O. Hashimoto and J. I. Hwang and S. Kameoka and B. H. Kang and E. H. Kim and J. H. Kim and M. J. Kim and T. Maruta and Y. Miura and Y. Miyake and T. Nagae and M. Nakamura and S. N. Nakamura and H. Noumi and Y. Okayasu and H. Outa and H. Park and P. K. Saha and Y. Sato and M. Sekimoto and T. Takahashi and H. Tamura and K. Tanida and A. Toyoda and K. Tsukada and T. Watanabe and H. J. Yim},
journal= {arXiv preprint arXiv:nucl-ex/0411018},
year = {2009}
}
备注
4 pages, 1 figure, International Nuclear Physics Conference (INPC 2004), Goteborg, Sweden, June 27 - July 2, 2004, to appear in Nuclear Physics A