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7. Leptogenesis in Supersymmetric Economical 3-3-1 Model
D. T. Huong (1), H. N. Long (2), and N. T. Thuy (3)
Institute of Physics, VAST, 10 Dao Tan, Ba Dinh, Ha Noi
We study a leptogenesis via decays of heavy Majorana neutrinos
produced non-thermally in inflaton decays in the supersymmetric
economical SU(3)_C X SU(3)_L X U(1)_X model with
inflationary scenario. For this purpose, neutrino masses in the
framework of the mentioned model are considered. At the treelevel,
the model contains three Dirac neutrinos: one massless, two
large with degenerate masses in the range of the electron mass. At
the one-loop level, the left-handed and right-handed neutrinos
obtain Majorana masses M_L,R in orders of 10^-2-10^-3 eV and
degenerate in M_R=-M_L, while the Dirac masses get a
contribution in the range of the tree-level. With the contribution
from the inflaton, the masses get a correct hierarchy. The leptonnumber
violating interaction of the inflaton with right-handed
neutrinos exists at the one-loop level, and this is a reason for nonthermal
leptogenesis. To satisfy both the gravitino abundance and
the cosmological constraint on neutrino mass m_\nu 3 \simeq 0.05
eV, by taking the reheating temperature as low as T_R= 10^6 GeV,
we get a limit on the ratio of masses of the light heavies neutrino to
those of the inflaton to be: 0.49 \leq M_R1 /M_\phi \leq 0.99.
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minimization with respect to all other deformation parameters in
every point of a grid. Macroscopic-microscopic method was applied
with mean-field in the form of Woods-Saxon potential. Nuclei
around magic number N=184, available in fusion channel
experiments at Dubna and GSI were studied. Interesting features in
some nuclei, like effect of a32 deformation on saddle points, three
axial shapes in ground state configuration, possible fission from
oblate shape are predicted.
Báo cáo Miệng
8. Effects of Exotic Shapes on Potential Energy Surface of
Superheavy Nuclei
Piotr Rozmej
Faculty of Physics and Astronomy, University of Zielona Gora,
Poland
In the paper, potential energy surface for many superheavy nuclei
was studied in extremely rich space of shapes. Thirteen deformation
degrees of freedom was used, including a20, a22, beta3, a32, a40,
a42, a44, a50, a52, a54, beta6, beta7 and beta8. The potential energy
surface was obtained as function of a20 and a22 deformation with
Hội nghị Vật lý lý thuyết toàn quốc lần thứ 35
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Tp. Hồ Chí Minh, 02-06/8/2010
9. Solutions for Yang-Mills Field with Singular Source Terms and
Higher Topological Indices
Nguyen Vien Tho (1), To Ba Ha (2), and Nguyen Quoc Hoan
(3)
(1) Hanoi University of Technology, 1 Dai Co Viet, Hai Ba Trung, Ha
Noi (2) Le Quy Don University; (3) Specialized School of Ha Giang
The screening of color charges in systems of non-Abelian Yang-
Mills fields coupled to source terms is a phenomenon of great
interest, since it may provide an argument for color confinement in
QCD. Some classes of solutions to the Yang-Mills equations with
source terms were discovered and investigated. In the present work,
we find solutions for Yang-Mills field with two point sources in the
sector of higher topological indices. Mathematically, this is a
nonlinear problem of elliptic partial differential equations with ï¤function
singular source terms and axial symmetry. The obtained
numerical solution by relaxation methods for field functions is
presented. We show that the screening of the source charges is
actually present and caused by the vector component of the gauge
potential. The total energies of the system are calculted for a range
of charge magnitudes, and the plot of energy versus charge
magnitude is presented.
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Hanoi University of Science, 334 Nguyen Trai, Thanh Xuan, Ha Noi
In this report the effective - section of Scattering of polarized
neutrons in ferromagnetic crystal in presence of radiation and
absorption of phonon is obtained and discussed.
Báo cáo Treo
12. Neutrino Masses and Mixing in Standard Model with A4 -
Flavour Symmetry
Ngo Thi Thu Dinh (1) and Phung Van Dong (2)
(1) Hanoi University of Science, 334 Nguyen Trai, Thanh Xuan, Ha
Noi,
(2) Institute of Physics, Vietnam Academy of Science and Technology,
10 Dao Tan, Ba Dinh, Ha Noi
Although the Standard Model is very successful, it also leaves many
questions unanswered, one of which is massless of neutrinos. In this
talk we introduce A4 - flavour symmetry into the Standard Model
with appropriate extension of scalar representations. As a result, the
neutrinos gain naturely small masses in agreement with experiment.
The neutrino mixing matrix in terms of tribimaximal form is
obtained.
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10. Inelastic Scattering of Polarized Neutrons in Paramagnetic
Crystal in Presence of Radiation and Absorption of Phonon
Vu Xuan Bach and Nguyen Dinh Dung
Hanoi University of Science, 334 Nguyen Trai, Thanh Xuan, Ha Noi
In this report the effective cross-section of inelastic scattering of
polarized neutrons in paramagnetic crystal inpresence of radiation
and absorption of phonon is obtained and discussed.
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11. Scattering of Polarized Neutrons in Ferromagnetic Crystal in
Presence of Radiation and Absorption of Phonon
Vu Xuan Chung and Nguyen Dinh Dung
Hội nghị Vật lý lý thuyết toàn quốc lần thứ 35
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