利用 WASA-at-COSY 研究 dd->4He{\pi}0 反应中的电荷对称性破缺
核实验
2014-10-24 v2
摘要
电荷对称性破缺 (CSB) 可观测量是检验夸克质量在核子层面诱导效应的合适实验工具。来自 TRIUMF 和 IUCF 的先前高精度数据目前正被用于在手征微扰理论框架内发展对 CSB 的一致描述。在本工作中，关于反应 dd->4He{\pi}0 的实验研究已扩展至更高的过剩能量，以提供关于末态 p 波贡献的信息。为此，利用 WASA-at-COSY 装置在束流动量 p=1.2 GeV/c 下进行了一次独占测量。总截面为 sigma(tot) = (118 +- 18(stat) +- 13(sys) +- 8(ext)) pb，且微分截面的首批数据与 s 波π介子产生一致。
引用
@article{arxiv.1407.2756,
title = {Charge Symmetry Breaking in dd->4He{\pi}0 with WASA-at-COSY},
author = {COSY Collaboration and P. Adlarson and W. Augustyniak and W. Bardan and M. Bashkanov and F. S. Bergmann and M. Berłowski and H. Bhatt and A. Bondar and M. Büscher and H. Calén and I. Ciepał and H. Clement and D. Coderre and E. Czerwiński and K. Demmich and E. Doroshkevich and R. Engels and A. Erven and W. Erven and W. Eyrich and P. Fedorets and K. Föhl and K. Fransson and F. Goldenbaum and P. Goslawski and A. Goswami and K. Grigoryev and C. -O. Gullström and C. Hanhart and F. Hauenstein and L. Heijkenskjöld and V. Hejny and B. Höistad and N. Hüsken and L. Jarczyk and T. Johansson and B. Kamys and G. Kemmerling and F. A. Khan and A. Khoukaz and D. A. Kirillov and S. Kistryn and H. Kleines and B. Kłos and W. Krzemień and P. Kulessa and A. Kupść and A. Kuzmin and K. Lalwani and D. Lersch and B. Lorentz and A. Magiera and R. Maier and P. Marciniewski and B. Mariański and M. Mikirtychiants and H. -P. Morsch and P. Moskal and H. Ohm and I. Ozerianska and E. Perez del Rio and N. M. Piskunov and P. Podkopał and D. Prasuhn and A. Pricking and D. Pszczel and K. Pysz and A. Pyszniak and C. F. Redmer and J. Ritman and A. Roy and Z. Rudy and S. Sawant and S. Schadmand and T. Sefzick and V. Serdyuk and B. Shwartz and R. Siudak and T. Skorodko and M. Skurzok and J. Smyrski and V. Sopov and R. Stassen and J. Stepaniak and E. Stephan and G. Sterzenbach and H. Stockhorst and H. Ströher and A. Szczurek and A. Täschner and A. Trzciński and R. Varma and M. Wolke and A. Wrońska and P. Wüstner and P. Wurm and A. Yamamoto and L. Yurev and J. Zabierowski and M. J. Zieliński and A. Zink and J. Złomańczuk and P. Żuprański and M. Żurek},
journal= {arXiv preprint arXiv:1407.2756},
year = {2014}
}
备注
14 pages, 5 figures