2,001 research outputs found
Perspectives of Nuclear Physics
The organizers of this meeting have asked me to present perspectives of
nuclear physics. This means to identify the areas where nuclear physics will be
expanding in the next future. In six chapters a short overview of these areas
will be given, where I expect that nuclear physics willdevelop quite fast: A.
Quantum Chromodynamics and effective field theories in the confinement region;
B. Nuclear structure at the limits; C. High energy heavy ion collisions; D.
Nuclear astrophysics; E. Neutrino physics; F. Test of physics beyond the
standard model by rare processes. After a survey over these six points I will
pick out a few topics where I will go more in details. There is no time to give
for all six points detailed examples. I shall discuss the following examples of
the six topics mentionned above: 1. The perturbative chiral quark model and the
nucleon -term, 2. VAMPIR (Variation After Mean field Projection In
Realistic model spaces and with realistic forces) as an example of the nuclear
structure renaissance, 3. Measurement of important astrophysical nuclear
reactions in the Gamow peak, 4. The solar neutrino problem. As examples for
testing new physics beyond the standard model by rare processes I had prepared
to speak about the measurement of the electric neutron dipole moment and of the
neutrinoless double beta decay. But the time is limited and so I have to skip
these points, although they are extremely interesting.Comment: 27 pages. Invited talk given at the ``IX Cortona meeting on problems
in theoretical nuclear physics", Cortona, Italy, October 9-12, 200
D' Production in Heavy Ion Collisions
The production of d' dibaryons in heavy ion collisions due to the elementary
process NN -> d' + pion is considered. The cross section NN -> d' + pion is
estimated using the vacuum d' width = 0.5 MeV extracted from data on the double
charge exchange reactions on nuclei. The d' production rate per single
collision of heavy ions is estimated at an incident beam energy of 1 A GeV
within the framework of the Quantum Molecular Dynamics transport model. We
suggest to analyse the invariant mass spectrum of the NN + pion system in order
to search for an abundance of events with the invariant mass of the d'
dibaryon. The d' peak is found to exceed the statistical fluctuations of the
background at a level of 6 standard deviations for 2 10^5 A central collisions
of heavy ions with the atomic number A.Comment: 29 pages including 7 figures, REVTe
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