Transposing Drama

Comparing the broken $U3 \times U3$ linear sigma model with experiment

“…As can be seen from Table I the predictions are not far from the experimental masses taken as a 0 (980), f 0 (980), K * 0 (1430), and σ(500). For a discussion of the existence of the σ(500) see my recent Frascati talk [4], which also includes some preliminary results of the present paper. Considering that one expects from our previous UQM analysis of the scalars [9] and our discussion above that unitarity corrections can be up to 30% , and should go in the right direction compared to experiment, one must conclude that these results are even better than expected.…”

“…Unfortunately this over 30 years old model [1] has had very few phenomenological applications, although important exceptions are the intensive efforts of M. Scadron and collaborators [2]. The reestablishment [3,4] of the light and broad σ has also more recently revitalized the interest in the linear sigma model [5][6][7].…”

Cosmological magnetic fields from primordial helicity

“…The standard α-Ω dynamo theory of galactic magnetic fields [2] has been criticized for not adequately taking into account the back reaction of the growing magnetic field, and in any case, the theory requires a seed field of unknown origin. There is now an extensive literature examining the possibility that magnetic fields were created by exotic processes in the early universe, although most such processes, if they work at all, produce fields on scales too small to be of interest to astronomy [3].…”

Neutron Star Properties in a Chiral SU(3) Model

“…The Nambu-Jona-Lasinio (NJL) model [5,6] is an effective theory which has these features of QCD implemented but it lacks confinement and thereby fails to describe finite nuclei and nuclear matter. The chiral SU(3) models, for example the linear SU(3)-σ model [7] have been quite successful in modeling meson-meson interactions. The K − N scattering data has been well reproduced using the chiral effective SU(3) Lagrangian [8,9].…”