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14 papers · 1 filter
One-Loop Determinant of Dirac Operator in Non-Renormalizable Models
A. A. Osipov, B. Hiller, A. H. Blin
We use proper-time regularizations to define the one-loop fermion determinant in the form suggested by Gasser and Leutwyler some years ago. We show how to obtain the polynomial by…
Scalar mesons as simple quark+antiquark states
Eef van Beveren, George Rupp
The Nijmegen Unitarized Meson Model and its application to scalar mesons is briefly revisited. It is shown that all scalar states up to 1.5 GeV can be described as triplet-P-zero q…
Droplet formation in cold asymmetric nuclear matter in the quark-meson-coupling model
G. Krein, D. P. Menezes, M. Nielsen +1
The quark-meson-coupling model is used to study droplet formation from the liquid-gas phase transition in cold asymmetric nuclear matter. The critical density and proton fraction f…
The Hipparcos HR diagram of nearby stars in the metallicity range -1.0 < [Fe/H] < 0.3
Y. Lebreton, M. -N. Perrin, R. Cayrel +2
From an initial sample of a few hundred stars selected for an Hipparcos program, a subsample of 33 objects with direct determination of their effective temperature, bolometric magn…
High Resolution RPC's for Large TOF Systems
P. Fonte, R. Ferreira Marques, J. Pinhao +2
Here we report on a particular type of RPC that presents up to 99% efficiency for minimum ionizing particles and a very sharp time resolution, below 50 ps sigma in the most optimiz…
Matter-induced omega -> pi pi decay
Wojciech Broniowski, Wojciech Florkowski, Brigitte Hiller
We calculate the width for the omega -> pi pi decay in nuclear matter in a hadronic model including mesons, nucleons and Delta isobars. We find a substantial width of the longitudi…