56 citations · 71 across the 9 of their papers we have counts for
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Baryons as Solitons in Chiral Quark Models
B. Golli, W. Broniowski, G. Ripka
We describe the formation of solitons in NJL-type models and discuss the influence of the regularization scheme on the stability of the solution. We concentrate on models with non-…
Vacuum properties in the presence of quantum fluctuations of the quark condensate
G. Ripka
The quantum fluctuations of the quark condensate are calculated using a regulated Nambu Jona-Lasinio model. The corresponding quantum fluctuations of the chiral fields are compared…
Non-local regularization of chiral quark models in the soliton sector
Georges Ripka, Bojan Golli
A chiral quark model is described which is regularized in terms of Lorentz invariant non-local interactions. The model is regularized to all loop orders and it ensures the proper q…
Solitons in a chiral quark model with non-local interactions
Bojan Golli, Wojciech Broniowski, Georges Ripka
Hedgehog solitons are found in a chiral quark model with non-local interactions. The solitons are stable without the chiral-circle constraint for the meson fields, as was assumed i…
The impossible regularization of the Nambu Jona-Lasinio model with vector interactions
Ian J. R. Aitchison, Georges Ripka
We show that the procedure of regularizing the real part of the euclidean action, while leaving the imaginary part unregularized, leads to a non-analytic and highly singular functi…
Analytic structure of meson propagators in the proper-time regularized Nambu--Jona-Lasinio model
W. Broniowski, G. Ripka, E. Nikolov +1
We analyze the analytic structure of meson propagators in the Nambu--Jona-Lasinio model with a proper-time regulator. We show that the regulator produces unphysical complex singula…