Scientific and Technical Aerospace Reports Volume 38 July 28, 2000
Scientific and Technical Aerospace Reports Volume 38 July 28, 2000
Scientific and Technical Aerospace Reports Volume 38 July 28, 2000
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ubbles in a liquid. Besides, the Casimir energy of the air bubbles in water proves to be immensely smaller than the amount of<br />
the energy emitted in a sonoluminescent flash. The dispersive effect is shown to be inessential for the final result.<br />
NTIS<br />
Sonoluminescence; Cavities<br />
<strong>2000</strong>0064055 Joint Inst. for Nuclear Research, Lab. of Particle Physics, Dubna, USSR<br />
Superposition of neutrino eigenstates <strong>and</strong> Dirac-Majorana oscillation<br />
Zajmidoroga, O.; Dec. 31, 1998; 15p; In Russian; In English<br />
Report No.(s): DE99-607991; JINR-R-2-98-36; No Copyright; Avail: Department of Energy Information Bridge<br />
The mixing matrix structure <strong>and</strong> evolution of eigenstates of neutrino provide the evidence in the existence of the superposition<br />
states of left- h<strong>and</strong>ed neutrino <strong>and</strong> right-h<strong>and</strong>ed antineutrino. These new states of neutrino have the properties of Majorana neutrino<br />
<strong>and</strong> have no well-defined lepton number. The physical perspectives to measure the Dirac-Majorana oscillation <strong>and</strong> the comparison<br />
with experimental data are presented.<br />
NTIS<br />
Neutrinos; Eigenvectors; Oscillations; Dirac Equation<br />
<strong>2000</strong>0064662 Abdus Salam International Centre for Theoretical Physics, Trieste, Italy<br />
Supersymmetric sine algebra <strong>and</strong> degeneracy of L<strong>and</strong>au levels<br />
Jellal, A.; Daoud, M.; Hassouni, Y.; Sep. 30, 1998; 11p; In English<br />
Report No.(s): DE99-6097<strong>38</strong>; IC-98/143; No Copyright; Avail: Department of Energy Information Bridge<br />
Two different realizations of the supersymmetric sine algebra (SSA) are given. We show that the quantum superalgebra sl(sub<br />
q)(2/1) is derived from the SSA. We discuss the relevance of the latter result to the study of spin-1/2 Bloch electron in a constant<br />
magnetic field. The relation between the deformation parameter q <strong>and</strong> the degeneracy of L<strong>and</strong>au levels is established.<br />
NTIS<br />
Supersymmetry; Sine Series; L<strong>and</strong>au Factor<br />
<strong>2000</strong>0064701 Abdus Salam International Centre for Theoretical Physics, Trieste, Italy<br />
Discrete symmetry breaking <strong>and</strong> restoration at finite temperature in 3D Gross-Neveu model<br />
Zhou Bang-rong,; Aug. 31, 1998; 9p; In English<br />
Report No.(s): DE99-609735; IC-98/114; No Copyright; Avail: Department of Energy Information Bridge<br />
Dynamical spontaneous breaking of some discrete symmetries including special parities <strong>and</strong> time reversal <strong>and</strong> their restoration<br />
at finite temperature T are researched by means of the real-time thermal field theory in 3D Gross- Neveu model. When<br />
(Lambda)/m(0), the ratio between the momentum cut-off <strong>and</strong> the dynamical fermion mass at T=0 is very large, the equation of<br />
critical chemical potential (mu)(sub c) <strong>and</strong> critical temperature T(sub c) will be (Lambda)- independent <strong>and</strong> identical to the one<br />
obtained by auxiliary scalar field approach in 1/N expansion. The dynamical fermion mass m(identical-to)m(T,(mu)), as the order<br />
parameter of symmetry breakings, is indicated to have the same (T(sub c)-T)(sup 1/2) behavior at T is less than or approx. T(sub<br />
c) as the one in 4D NJL-model <strong>and</strong> it shows the second-order phase transition feature of the symmetry restoration at T>T(sub c).<br />
It is also proven that no scalar bound state could exist in this model.<br />
NTIS<br />
Discrete Functions; Broken Symmetry; Restoration<br />
<strong>2000</strong>0064702 Abdus Salam International Centre for Theoretical Physics, Trieste, Italy<br />
Nambu-Goldstone mechanism in real-time thermal field theory<br />
Zhou Bangrong,; Aug. 31, 1998; 13p; In English<br />
Report No.(s): DE99-609734; IC-98/113; No Copyright; Avail: Department of Energy Information Bridge<br />
In a one-generation fermion condensate scheme of electroweak symmetry breaking, it is proven that at finite temperature T<br />
below the symmetry restoration temperature T(sub c), a massive Higgs boson <strong>and</strong> three massless Nambu-Goldstone bosons could<br />
emerge from the spontaneous breaking of electroweak group SU(sub L)(2)xU(sub Y)(1)(yields)U(sub Q)(1) if the two fermion<br />
flavors in the one generation are mass-degenerate, thus the Goldstone Theorem is rigorously valid in this case. However, if the<br />
two fermion flavors have unequal masses, owing to ’thermal fluctuation’, the Goldstone Theorem will be true only approximately<br />
for a very large momentum cut-off (Lambda) in zero temperature fermion loop or for low energy scales. All possible pinch singularities<br />
are proven to cancel each other, as is expected in a real-time thermal field theory.<br />
NTIS<br />
Real Time Operation; Field Theory (Physics)<br />
208
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