10,175 research outputs found
Effects of the Electronic Structure, Phase Transition and Localized Dynamics of Atoms in the Formation of Tiny Particles of Gold
In addition to the self-governing properties, tiny metallic colloids are the
building blocks of larger particles. This topic has been a subject of many
studies. Tiny particles of different sizes developed under three different
experiments are discussed in this work. The development of a tiny-sized
particle depends on the attained dynamics of atoms. When atoms of the compact
monolayer assembly bind by a nanoenergy packet, the developed tiny-sized
particle elongates atoms of arrays into the structures of smooth elements at
the solution surface. The impinging electron streams at a fixed angle can
elongate the already elongated atoms of arrays. Travelling photons along the
interface influence the modified atoms. Gold atoms can also develop different
tiny particles inside the solution. In addition to the dynamics of atoms,
miscellaneous factors can contribute in the development of such tiny particles.
Atoms in the form of tiny clusters can also amalgamate to develop a tiny-sized
particle. In the third kind of tiny particle, amalgamated atoms can bind by
executing electron dynamics. However, not all of the atoms can bind by the
electron dynamics. This study very concisely highlights the fundamental process
of developing a variety of tiny particles in which electronic structure, phase
transition and localized dynamics of gold atoms influence the structure. The
study targets the specific discussion that how atoms of tiny-sized particles
bind, and how travelling photons along the air-solution interface influence
their structure. Several possibilities may be opened through pulse-based
process to develop engineered materials
Finslerian dipolar modulation of the CMB power spectra at scales
A common explanation for the CMB power asymmetry is to introduce a dipolar
modulation at the stage of inflation, where the primordial power spectrum is
spatially varying. If the universe in the stage of inflation is Finslerian, and
if the Finsler spacetime is non-reversible under parity flip, ,
then a three dimensional spectrum which is the function of wave vector and
direction is valid. In this paper, a three dimensional primordial power
spectrum with preferred direction is derived in the framework of Finsler
spacetime. It is found that the amplitude of dipolar modulation is related to
the Finslerian parameter, which in turn is a function of wave vector. The
angular correlation coefficients are presented, and the numerical results for
the anisotropic correlation coefficients over the multipole range are
given.Comment: 13 pages, 1 figure, accepted by EPJ
The electromagnetic decays of the charmed and bottom baryons in chiral perturbation theory
We have investigated the electromagnetic decays of the antitriplet and sextet
charmed baryon systems with in the
framework of the heavy baryon chiral perturbation theory. We first construct
the chiral Lagrangians at and . Then we calculate the
electromagnetic (EM) decay amplitudes of the charmed baryon systems up to
. With the help of the quark model, we estimate the low energy
constants. The numerical results of the EM decay widths show good convergence
of the chiral expansion. We notice that the two neutral EM decay processes
and
are strongly suppressed by the SU(3) U-spin flavor symmetry. With the same
formalism, we also estimate the EM decay widths of the bottomed baryons. The EM
decay widths of the heavy baryons may be measured at facilities such as LHCb
and JPARC. The explicit chiral structures of the heavy baryon decay amplitudes
derived in this work may be useful to the possible chiral extrapolations of the
future lattice simulations of these EM decay amplitudes
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