核物质中 $\omega$ 介子寿命的修正
核实验
2008-11-26 v1 高能物理 - 唯象学
核理论
摘要
利用波恩 ELSA 标记光子设施的 Crystal Barrel/TAPS 探测器，测量了 C、Ca、Nb 和 Pb 原子核上的 介子光生过程。将 介子截面对核质量数的依赖性与三种不同类型的模型进行了比较：Glauber 分析、Giessen 理论组的 BUU 分析以及 Valencia 理论组的计算。在所有三种情况下，对于平均 3-动量为 1.1 GeV/c 的情况，发现在正常核物质密度下，非弹性 宽度为 。在 介子的静止系中，该非弹性 宽度对应于 寿命缩短了约 30 倍。首次从实验中提取了动量依赖的 N 截面，其范围约为 70 mb。
关键词
引用
@article{arxiv.0802.0989,
title = {Modification of the $\omega$-Meson Lifetime in Nuclear Matter},
author = {M. Kotulla and D. Trnka and P. Mühlich and G. Anton and J. C. S. Bacelar and O. Bartholomy and D. Bayadilov and Y. A. Beloglazov and R. Bogendörfer and R. Castelijns and V. Crede and H. Dutz and A. Ehmanns and D. Elsner and R. Ewald and I. Fabry and M. Fuchs and K. Essig and Ch. Funke and R. Gothe and R. Gregor and A. B. Gridnev and E. Gutz and S. Höffgen and P. Hoffmeister and I. Horn and J. Hössl and I. Jaegle and J. Junkersfeld and H. Kalinowsky and Frank Klein and Fritz Klein and E. Klempt and M. Konrad and B. Kopf and B. Krusche and J. Langheinrich and H. Löhner and I. V. Lopatin and J. Lotz and S. Lugert and D. Menze and J. G. Messchendorp and T. Mertens and V. Metag and U. Mosel and M. Nanova and R. Novotny and M. Ostrick and L. M. Pant and H. van Pee and M. Pfeiffer and A. Roy and A. Radkov and S. Schadmand and Ch. Schmidt and H. Schmieden and B. Schoch and S. Shende and G. Suft and V. V. Sumachev and T. Szczepanek and A. Süle and U. Thoma and R. Varma and D. Walther and Ch. Weinheimer and Ch. Wendel},
journal= {arXiv preprint arXiv:0802.0989},
year = {2008}
}
备注
5 pages, 4 figures