1,089 research outputs found
Phase structure of the generalized two dimensional Yang-Mills theories on sphere
We find a general expression for the free energy of
generalized 2D Yang-Mills theories in the strong () region at large .
We also show that in this region, the density function of Young tableau of
these models is a three-cut problem. In the specific model, we show
that the theory has a third order phase transition, like (YM_2) and
models. We have some comments for cases. At the end, we
study the phase structure of model for region.Comment: 13 pages, LaTex,the introduction section was changed,will be appeared
in: Eur. Phys. J. C (1999
Denosing Using Wavelets and Projections onto the L1-Ball
Both wavelet denoising and denosing methods using the concept of sparsity are
based on soft-thresholding. In sparsity based denoising methods, it is assumed
that the original signal is sparse in some transform domains such as the
wavelet domain and the wavelet subsignals of the noisy signal are projected
onto L1-balls to reduce noise. In this lecture note, it is shown that the size
of the L1-ball or equivalently the soft threshold value can be determined using
linear algebra. The key step is an orthogonal projection onto the epigraph set
of the L1-norm cost function.Comment: Submitted to Signal Processing Magazin
Electroweak Phase Transition, Gravitational Waves and Dark Matter in Two Scalar Singlet Extension of The Standard Model
In this paper, the electroweak phase transition, the gravitational waves and
the dark matter issues are investigated in two scalar singlet extension of the
standard model. The detectability of the gravitational wave signals are
discussed by comparing the results with the sensitivity curves of
, , and
detectors. It is shown that the results support the recent reports on the dark
matter relic density by collaboration and the
direct detection experiment by
collaboration.Comment: 18 pages, 2 figures (4 subfigures), 4 tables, final version to match
the published versio
Mass of the Stabilized Radion in the Limit of Finite Quartic Coupling
We present an exact treatment of the modulus stabilization condition with the
general boundary conditions of the bulk scalar field in the Randall-Sundrum
model. We find analytical expressions for the value of the modulus and the mass
of the radion.Comment: 11 pages, 3 figures, Accepted for publication in AHE
Numerical simulation of single droplet dynamics in three-phase flows using ISPH
In this study, a new surface tension formulation for modeling incompressible, immiscible three-phase fluid flows in the context of incompressible smoothed particle hydrodynamics (ISPH) in two dimensions has been proposed. A continuum surface force model is employed to transform local surface tension force to a volumetric force while physical surface tension coefficients are expressed as the sum of phase specific surface tension coefficients, facilitating the implementation of the proposed method at triple junctions where all three phases are present. Smoothed color functions at fluid interfaces along with artificial particle displacement throughout the computational domain are combined to increase accuracy and robustness of the model. In order to illustrate the effectiveness of the proposed method, several numerical simulations have been carried out and results are compared to analytical data available in literature. Results obtained by simulations are compatible with analytical data, demonstrating that the ISPH scheme proposed here is capable of handling three-phase flows accurately
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