TY - JOUR
T1 - Symmetry patterns in the (N, Δ) spectrum
AU - González, P.
AU - Vijande, J.
AU - Valcarce, A.
AU - Garcilazo, H.
N1 - Funding Information:
JCyL under Contract No. SA104/04, and by GV under Contract No. GV05/276.
Funding Information:
resonances as shown in Fig. 2, containing the [J = 5/2 − J = 15/2] ground and first non-radial excitations. It is worth to mention that the existence of nucleon parity doublets is a consequence of the almost exact cancellation of a bigger repulsion (due to a bigger K and L) and a bigger attraction (due to S = 1/2) for N+ states. No parallel degeneracy for Δ’s is found against theoretical proposals [4] that have been questioned recently [5]. Though new experimental data, to confirm or discard the validity of our predictions, are definitely needed we think the symmetry way can be of great interest to guide experimental searches. This work has been partially funded by MCyT under Contract No. FPA2004-05616, by
PY - 2007/6/15
Y1 - 2007/6/15
N2 - We revise the role played by symmetry in the study of the low-lying baryon spectrum and comment on the difficulties when trying to generalize the symmetry pattern to higher energy states. We show that for the (N, Δ) part such a generalization is plausible allowing the identification of spectral regularities and the prediction of until now non-identified resonances.
AB - We revise the role played by symmetry in the study of the low-lying baryon spectrum and comment on the difficulties when trying to generalize the symmetry pattern to higher energy states. We show that for the (N, Δ) part such a generalization is plausible allowing the identification of spectral regularities and the prediction of until now non-identified resonances.
UR - http://www.scopus.com/inward/record.url?scp=34250815131&partnerID=8YFLogxK
U2 - 10.1016/j.nuclphysa.2007.03.093
DO - 10.1016/j.nuclphysa.2007.03.093
M3 - Artículo
SN - 0375-9474
VL - 790
SP - 550c-553c
JO - Nuclear Physics, Section A
JF - Nuclear Physics, Section A
IS - 1-4
ER -