1,224 research outputs found
SSC Result 2017 All Education Board
SSC Result 2017 Bangladesh published on 30 may 2017. The official website of Bangladesh Education Board will be published SSC Result 2017 Educational Website in Bangladesh. Here uou get SSC Result 2017 Dhaka Board ,SSC Result 2017 Barisal Board ,SSC Result 2017 Rajshahi Board ,SSC Result 2017 Chittagong Board ,SSC Result 2017 Jessore Board ,SSC Result 2017 Sylhet Board ,SSC Result 2017 Dinajpur Board ,SSC Result 2017 Dakhil Board ,SSC Result 2017 Vocational Board & SSC Exam routine 2017 etc
Dynamical effects of QCD in systems
We study the coupling of a tetraquark system to an exchanged meson-meson
channel, using a pure gluonic theory based four-quark potential {\em matrix}
model which is known to fit well a large number of data points for lattice
simulations of different geometries of a four-quark system. We find that if
this minimal-area-based potential matrix replaces the earlier used simple
Gaussian form for the gluon field overlap factor in its off-diagonal terms,
the resulting -matrix and phase shifts develop an angle dependence whose
partial wave analysis reveals wave and higher angular momentum components
in it. In addition to the obvious implications of this result for the
meson-meson scattering, this new feature indicates the possibility of orbital
excitations influencing properties of meson-meson molecules through a
polarization potential. We have used a formalism of the resonating group
method, treated kinetic energy and overlap matrices on model of the potential
matrix, but decoupled the resulting complicated integral equations through the
Born approximation. In this exploratory study we have used a quadratic
confinement and not included the spin-dependence; we also used the
approximation of equal constituent quark masses.Comment: 18 pages, 9 figure
Application of multiple criteria decision methods in space exploration initiative design and planning
Fellowship activities were directed towards the identification of opportunities for application of the Multiple Criteria Decision Making (MCDM) techniques in the Space Exploration Initiative (SEI) domain. I identified several application possibilities and proposed demonstration application in these three areas: evaluation and ranking of SEI architectures, space mission planning and selection, and space system design. Here, only the first problem is discussed. The most meaningful result of the analysis is the wide separation between the two top ranked architectures, indicating a significant preference difference between them. It must also be noted that the final ranking reflects, to some extent, the biases of the evaluators and their understanding of the architecture
- …