
Margueron
,
Jérôme; Hoffmann Casali
,
Rudiney; Gulminelli
,
Francesca
International audience

Margueron
,
Jérôme; Hoffmann Casali
,
Rudiney; Gulminelli
,
Francesca
International audience

Boose, D.; Richert, J.

Li, X.; Dudek, J.

Robin
,
J.; Byrski
,
Th.; Duchêne
,
G.; Beck
,
F.A.; Curien
,
D.; Dubray
,
N.; Dudek
,
J.; Góźdź
,
A.; Odahara
,
A.; Schunck
,
N.; Adimi
,
N.; Appelbe
,
D.E.; Bednarczyk
,
P.; Bracco
,
A.; Cederwall
,
B.; Courtin
,
S.; M. Cullen
,
D.; Dorvaux
,
O.; Ertück
,
S.; De France
,
G.; Gall
,
B.; Joshi
,
P.; L. King
,
S.; Korichi
,
A.; Lagergren
,
K.; Lo Bianco
,
G.; Leoni
,
S.; LopezMartens
,
A.; Lunardi
,
S.; Million
,
B.; Nourredine
,
A.; Pachoud
,
E.; S. Paul
,
E.; Petrache
,
C.; Piqueras
,
I.; Redon
,
N.; Saltarelli
,
A.; Simpson
,
J.; Stezowski
,
O.; Venturelli
,
R.; Vivien
,
J.P.; Zuber
,
K.
A detailed study of known and new SD bands in Tb isotopes has been performed with the use of the EUROBALL IV ray array. The highstatistics data set has allowed for the extension of known SD bands at low and high spins by new ray transitions. These transitions, as it turns out, correspond to the rotational frequencies where the principal superdeformed gaps (Z=66,N=86) close giving rise to up or downbending mechanisms. This enables to attribute the underlying theoretical configurations with much higher confidence as compared to the previous identifications. Five new SD bands have been discovered, three of them assigned...

Margueron
,
Jérôme; Casali
,
Rudiney
International audience

Chanfray
,
G.; Delorme
,
J.; Ericson
,
M.
We derive the expressions of the vector and axial current from a chiral Lagrangian restricted to nucleons and pions. They display mixing terms between the axial and vector currents. We study how the modification of the quark condensate affects the coupling constants of the axial cur rent, namely the pion decay constant and the nucleonic axial one. In the second case and in a dense medium, we express the renormalization as a meson exchange current. By doing so we show what part of the scalar density of the quarks contributes to the renormalization. We give an estimate for the quenching...

Mizutani
,
T.; Fayard
,
C.; Lamot
,
G.H.; Saghai
,
B.
Previous approaches to the photo and electroproduction of strangeness off the proton, based upon effective hadronic Lagrangians, are extended here to incorporate the so called offshell effects inherent to the fermions with spin = 3/2. A formalism for intermediatestate, spin 3/2, nucleonic and hyperonic resonances is presented and applied to the processes $\gamma + p > K^{+} + as well as the branching ratio for the crossed channel reaction $K^ + p > significant, of various observables to such effects are discussed.

Lojewski, Z.; NerloPomorska, B.; Dudek, J.

Zhao, Q.
In this work, an improved quark model approach to the $\omega$ meson photoproduction with an effective Lagrangian is presented. The {\it t}channel {\it natural}parity exchange is taken into account through the Pomeron exchange, while the {\it unnatural}parity exchange is described by the $\pi^0$ exchange. With a very limited number of parameters, the available experimental data in the low energy regime can be consistently accounted for. We find that the beam polarization observables show sensitivities to some {\it s}channel individual resonances in the $SU(6)\otimes O(3)$ quark model symmetry limit. Especially, the two resonances $P_{13}(1720)$ and $F_{15}(1680)$, which belong to the representation...

Dubray, N.; Dudek, J.; Maj, A.
We calculate the probability distribution describing the thermal fluctuations of the nuclear shape, using LublinStrasbourg Drop (LSD) model for the macroscopic nuclear energies and deformed WoodsSaxon model for the singlenucleonic level densities. Examples of applications are presented in the form of the GDR spectra of hot 46Ti and 216Rn nuclei.

Renault, G.; Collaboration, The STAR
3 pages, 3 figures, contribution to proceedings of the Second Warsaw Meeting on Particle Correlations and Resonances in Heavy Ion Collisions, Warsaw 1518 Oct 2003, to be published in Nucleonica

Renault, G.; Collaboration, The STAR
3 pages, 3 figures, contribution to proceedings of the Second Warsaw Meeting on Particle Correlations and Resonances in Heavy Ion Collisions, Warsaw 1518 Oct 2003, to be published in Nucleonica

Renault, G.; Collaboration, The STAR
3 pages, 3 figures, contribution to proceedings of the Second Warsaw Meeting on Particle Correlations and Resonances in Heavy Ion Collisions, Warsaw 1518 Oct 2003, to be published in Nucleonica

Renault, G.; Collaboration, The STAR
3 pages, 3 figures, contribution to proceedings of the Second Warsaw Meeting on Particle Correlations and Resonances in Heavy Ion Collisions, Warsaw 1518 Oct 2003, to be published in Nucleonica

Renault, G.; Collaboration, The STAR
3 pages, 3 figures, contribution to proceedings of the Second Warsaw Meeting on Particle Correlations and Resonances in Heavy Ion Collisions, Warsaw 1518 Oct 2003, to be published in Nucleonica

Suraud, E.
We present part of our (direct or indirect) knowledge on the equation of state of nuclear matter in a densitytemperature domain for which nucleonic effects are dominant (densities smaller than 24 times the saturation density and temperatures smaller than 1020 MeV). The text is divided into three parts corresponding, respectively, to direct studies close to the saturation, to the astrophysical case and to the studies involving heavyion collisions. In chapter one, after a brief introduction to the concept of equation of state, we disçuss the saturation property of nuclear matter. The notion of incompressibility modulus is also introduced and its...

Marini, P.
The properties of nuclear matter in the nucleonic regime are determined by the nuclear interaction, which is, in turn, uniquely linked to the nuclear equation of state (EOS). In spite of its key role in determining important properties of exotic nuclei and astrophysical objects such as neutron stars, the equation of state for asymmetric nuclear matter has relatively few constraints. In particular, the density dependence of the potential part of the symmetry energy term of the EOS represents one of the main challenges for the research activities in nuclear physics. The isotopic distributions of complex fragments produced in multifragmentation reactions...

Rios Tascon, Andres
We explore two methods aimed at alleviating two difficulties in Lattice QCD: statistical noise and data storage. The first method intends to improve the signaltonoise (S/N) ratio in threepoint correlators, by extending previous work by Detmold and Endres. We test the method in the measurement of two observables: the nucleonic axial charge, and a matrix element computation related to the electromagnetic form factor of the rho meson. Only in the case of the rho we see a very slight improvement. We conclude that, in general, a casebycase study would be needed to determine the effectiveness of the S/N optimization. The...

Margueron
,
J.
International audience