来自$\gamma + Nb \to \pi^{0}\gamma + X$反应的介质中$\omega$质量
核实验
2012-08-27 v2
摘要
重新分析了在原子核上光产生介子的数据，以寻找介质中的修正。这些数据是在波恩ELSA加速器设施上用Crystal Barrel(CB)/TAPS探测器系统获取的。该数据集分析的首批结果由D. Trnka等人发表在Phys. Rev. Lett 94 (2005) 192303 \cite{david}上，声称在正常核物质密度下，核介质中质量降低了14。发现提取的线形对本底扣除敏感。因此，启动了同一数据集的重新分析，并开发了一种新方法，以直接从数据中减少本底并确定本底的形状和绝对大小。描述了重新分析和本底确定的细节。重新分析中提取的靶上的信号，与作为参考测量的靶上的相应线形相比，没有显示出偏差。因此，早先关于介质中质量偏移的声称未被证实。讨论了线形对不同介质中修正方案的敏感性。
引用
@article{arxiv.1005.5694,
title = {In-medium $\omega$ mass from the $\gamma + Nb \to \pi^{0}\gamma + X$ reaction},
author = {TAPS Collaboration and M. Nanova and V. Metag 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 K. Essig and R. Ewald and I. Fabry and M. Fuchs 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 Friedrich Klein and E. Klempt and M. Konrad and B. Kopf and M. Kotulla and B. Krusche and J. Langheinrich and H. Löhner and I. V. Lopatin and J. Lotz and S. Lugert and D. Menze and T. Mertens and J. G. Messchendorp and C. Morales 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 A. Süle and V. V. Sumachev and T. Szczepanek and U. Thoma and D. Trnka and R. Varma and D. Walther and Ch. Weinheimer and Ch. Wendel},
journal= {arXiv preprint arXiv:1005.5694},
year = {2012}
}
备注
13 pages and 11 figures, submitted for publication