Abstract
The WASA Detector Facility is an internal experiment at the cooler synchrotron (COSY) in Jülich, Germany. The COSY accelerator provides proton and deuteron beams with momenta up to 3.7 GeV/c giving access to hadron physics including the strange quark sector. The physics program with the WASA detector involves hadron dynamics and hadron structure. Key experiments address fundamental symmetries and symmetry violations via the study of rare and not-so-rare meson decays. From the very first production run, results on the Dalitz plot slope parameter in the isospin violating η → 3π 0 decay have been obtained. The 3π 0 final state is also used to study meson production mechanisms. Investigations of other decay modes of the η-meson address C, P, and T symmetries and combinations. Higher orders in chiral perturbation theory are probed with the η → π 0 decay. The status and plans for studying hadron structure with Dalitz decays of mesons are presented.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
WASA-at-COSY Collaboration, proposal for WASA-at-COSY, nucl-ex/0411038
COSY proposal #186 (2009), http://www.fz-juelich.de/ikp/publications/List_of_all_COSY-Proposals.shtml
M Bashkanov et al, Phys. Rev. Lett. 102, 052301 (2009)
Particle Data Group: C Amsler et al, Phys. Lett. B667, 1 (2008)
WASA-at-COSY Collaboration: C Adolph et al, Phys. Lett. B677, 24 (2009)
W B Tippens et al, Phys. Rev. Lett. 87, 192001 (2001)
S Giovannella et al, in: Proceedings of La Thuile 2005, arXiv:hep-ex/0505074
M Bashkanov et al, Phys. Rev. C76, 048201 (2007)
F Ambrosino et al, in: Proceedings of LP07 Conference, arXiv:0707.4137 [hep-ex]
S Prakhov et al, Phys. Rev. C79, 035204 (2009)
M Unverzagt et al, Eur. Phys. J. A39, 169 (2009)
D Alde et al, Z. Phys. C25, 225 (1984)
A Abele et al, Phys. Lett. B417, 193 (1998)
KLOE Collaboration: F Ambrosino et al, J. High Energy Phys. 0805, 006 (2008)
M Gormley et al, Phys. Rev. D2, 501 (1970)
J G Layter et al, Phys. Rev. D7, 2565 (1973)
A Lopez et al, Phys. Rev. Lett. 99, 122001 (2007)
J Gasser and H Leutwyler, Nucl. Phys. B250, 465 (1985)
M Berlowski et al, Phys. Rev. D77, 032004 (2008)
F Ambrosino et al, Phys. Lett. B675, 283 (2009)
C Bargholtz et al, Phys. Lett. B644, 299 (2007)
D N Gao et al, Mod. Phys. Lett. A17, 1583 (2002)
L G Landsberg, Phys. Rep. 128, 301 (1985)
L Bergstrom, Z. Phys. C14, 129 (1982)
M J Savage, M E Luke and M B Wise, Phys. Lett. B291, 481 (1992)
L Ametller, A Bramon and E Masso, Phys. Rev. D48, 3388 (1993)
R Maier, Nucl. Instrum. Methods A390, 1 (1997)
NA60 Collaboration: R Arnaldi et al, Phys. Lett. B677, 260 (2009)
S Leupold and M F M Lutz, Eur. Phys. J. A39, 205 (2009)
Author information
Authors and Affiliations
Corresponding author
Additional information
For the WASA-at-COSY Collaboration
Rights and permissions
About this article
Cite this article
Schadmand, S. Hadrons and broken symmetries with WASA-at-COSY. Pramana - J Phys 75, 225–234 (2010). https://doi.org/10.1007/s12043-010-0111-y
Published:
Issue Date:
DOI: https://doi.org/10.1007/s12043-010-0111-y