نتایج جستجو برای: degenerate branching

تعداد نتایج: 48655  

2004
S. Rigolin

The presence of degeneracies can considerably worsen the measure of the neutrino oscillation parameters θ13 and δ. We study the physics reach of a specific “CERN” setup, using a standard β-Beam and Super-Beam facility. These facilities have a similar sensitivity in both parameters. Their combination does not provide any dramatic improvement as expected due to their almost identical L/E ratio. W...

2008
Seungwon Baek

The large ratio of color-suppressed tree amplitude to color-allowed one in B → ππ decays is difficult to understand within the Standard Model, which is known as the “B → ππ puzzle”. The two tree diagrams contain the upand charm-quark component of penguin amplitude, Puc, which cannot be separated by measuring B → ππ decays alone. We show that the measurements of the branching ratio and direct CP...

2000
S. Khalil G. Lazarides C. Pallis

The minimal supersymmetric standard model with complete, partial or no Yukawa unification and radiative electroweak breaking with boundary conditions from the Hořava-Witten theory is considered. The parameters are restricted by constraining the lightest sparticle relic abundance by cold dark matter considerations and requiring the b-quark mass after supersym-metric corrections and the branching...

2007
STEVEN P. LALLEY XINGHUA ZHENG

Consider a critical nearest neighbor branching random walk on the d-dimensional integer lattice initiated by a single particle at the origin. Let Gn be the event that the branching random walk survives to generation n. We obtain limit theorems conditional on the event Gn for a variety of occupation statistics: (1) Let Vn be the maximal number of particles at a single site at time n. If the offs...

Journal: :international journal of nano dimension 0
a. bahari department of physics, lorestan university, lorestan, iran f. rahimi moghadam department of physics, lorestan university, lorestan, iran

we will present a detailed investigation of intersubband transitions process in core-multi shells quantum dots. the confined wave functions and eigenenergies of electrons in quantum dots have been calculated under the effective-mass approximation by solving a three-dimensional schrodinger equation. excellent dependence is found between size effects, time relaxation and degenerate four wave mixi...

Graphene is determined by a wonderful carrier transport property and high sensitivityat the surface of a single molecule, making them great as resources used in Nano electronic use.TGN is modeled in form of three honeycomb lattices with pairs of in-equivalent sites as {A1, B1},{A2, B2}, and {A3, B3} which are located in the top, center and bottom layers, respectively. Trilayer...

2000
Fabrizio Catanese

The focal locus X of an aane variety X is roughly speaking the (projective) closure of the set of points O for which there is a smooth point x 2 X and a circle with centre O passing through x which os-culates X in x. Algebraic geometry interprets the focal locus as the branching locus of the endpoint map between the Euclidean normal bundle N X and the projective ambient space (sends the normal ...

Journal: :SIAM Journal on Optimization 2006
William W. Hager Hongchao Zhang

An active set algorithm (ASA) for box constrained optimization is developed. The algorithm consists of a nonmonotone gradient projection step, an unconstrained optimization step, and a set of rules for branching between the two steps. Global convergence to a stationary point is established. For a nondegenerate stationary point, the algorithm eventually reduces to unconstrained optimization with...

2007
Steven Lalley Xinghua Zheng

We consider a critical nearest neighbor branching random walk on the d−dimensional integer lattice. Denote by Vm the maximal number of particles at a single site at time m, and by Gm the event that the branching random walk survives to generation m. We show that if the offspring distribution has finite n-th moment, then in dimensions d ≥ 3, conditional on Gm, Vm = Op(m 1 n ); and if the offspri...

2008
S. W. Ham S. K. Oh

Within the framework of the minimal non-minimal supersymmetric standard model (MNMSSM) with tadpole terms, CP violation effects in the Higgs sector are investigated at the one-loop level, where the radiative corrections from the loops of the quark and squarks of the third generation are taken into account. Assuming that the squark masses are not degenerate, the radiative corrections due to the ...

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