Charge Symmetry Breaking in dd->4He{\pi}0 with WASA-at-COSY
Abstract
Charge symmetry breaking (CSB) observables are a suitable experimental tool to examine effects induced by quark masses on the nuclear level. Previous high precision data from TRIUMF and IUCF are currently used to develop a consistent description of CSB within the framework of chiral perturbation theory. In this work the experimental studies on the reaction dd->4He{\pi}0 have been extended towards higher excess energies in order to provide information on the contribution of p-waves in the final state. For this, an exclusive measurement has been carried out at a beam momentum of p=1.2 GeV/c using the WASA-at-COSY facility. The total cross section amounts to sigma(tot) = (118 +- 18(stat) +- 13(sys) +- 8(ext)) pb and first data on the differential cross section are consistent with s-wave pion production.
Keywords
Cite
@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}
}
Comments
14 pages, 5 figures