Measurement of the beta-asymmetry parameter of Cu-67 in search for tensor-type currents in the weak interaction

0433913 - ÚJF 2015 RIV US eng J - Journal Article
Soti, G. - Wauters, F. - Breitenfeldt, M. - Finlay, P. - Herzog, P. - Knecht, A. - Koster, U. - Kraev, I. S. - Porobic, T. - Prashanth, P. N. - Towner, I. S. - Tramm, C. - Zákoucký, Dalibor - Severijns, N.
Measurement of the beta-asymmetry parameter of Cu-67 in search for tensor-type currents in the weak interaction.
Physical Review. C. Roč. 90, č. 3 (2014), 035502. ISSN 0556-2813
R&D Projects: GA MŠMT LA08015; GA MŠMT(CZ) LG13031
Institutional support: RVO:61389005
Keywords : nuclear orientation experiments * isomer separation * HPGe detectors
Subject RIV: BG - Nuclear, Atomic and Molecular Physics, Colliders
Impact factor: 3.733, year: 2014

Precision measurements at low energy search for physics beyond the standard model in a way complementary to searches for new particles at colliders. In the weak sector the most general beta-decay Hamiltonian contains, besides vector and axial-vector terms, also scalar, tensor, and pseudoscalar terms. Current limits on the scalar and tensor coupling constants from neutron and nuclear beta decay are on the level of several percent. The obtained limits are comparable to limits from other correlation measurements in nuclear beta decay and contribute to further constraining tensor coupling constants.
Permanent Link: http://hdl.handle.net/11104/0238129