2,936 research outputs found
CP-odd Neutral Higgs Effects in Top -- anti-Top Production
We study violation in the process at
an -TeV collider. As the source of violation we assume a two-Higgs
doublet model with an explicitly -noninvariant Higgs potential. Sizeable
-odd observables originating from the subprocess reaction, , may arise as a result of finite width effects of the neutral Higgs
particles. constraints due to final (initial) state interactions are also
taken into account. Numerical estimates of the asymmetry are given.Comment: 28 pages(2 Figs not included), LaTeX, MZ-TH/92-5
From Global to Local Dynamics: Effects of the Expansion on Astrophysical Structures
We explore the effects of background cosmology on large scale structures with
non-spherical symmetry by using the concept of quasi-equilibrium which allows
certain internal properties (e.g. angular velocity) of the bodies to change
with time. In accordance with the discovery of the accelerated phase of the
universe we model the cosmological background by two representative models: the
CDM Model and the Chaplygin Gas Model. We compare the effects of the
two models on various properties of large astrophysical objects. Different
equations of state are also invoked in the investigation.Comment: References added To be published in CQ
Design and development of a fast scan infrared detection and measurement instrument
Infrared microscope instrument measures and plots the infrared profile of semiconductor chips, transistors and integrated circuits. Infrared analyses yields information on electrical and physical properties, enabling manufacturing improvements in semiconductor performance and reliability. Operational performance and main sections of the instrument are given
The Consistent Newtonian Limit of Einstein's Gravity with a Cosmological Constant
We derive the `exact' Newtonian limit of general relativity with a positive
cosmological constant . We point out that in contrast to the case with
, the presence of a positive in Einsteins's equations
enforces, via the condition , on the potential , a range
, within which the
Newtonian limit is valid. It also leads to the existence of a maximum mass,
. As a consequence we cannot put the boundary
condition for the solution of the Poisson equation at infinity. A boundary
condition suitably chosen now at a finite range will then get reflected in the
solution of provided the mass distribution is not spherically symmetric.Comment: Latex, 15 pages, no figures, errors correcte
The capture time of grids
We consider the game of Cops and Robber played on the Cartesian product of
two trees. Assuming the players play perfectly, it is shown that if there are
two cops in the game, then the length of the game (known as the 2-capture time
of the graph) is equal to half the diameter of the graph. In particular, the
2-capture time of the m x n grid is proved to be floor ((m+n-2)/2).Comment: 7 page
Efficient bounds on quantum communication rates via their reduced variants
We investigate one-way communication scenarios where Bob manipulating on his
parts can transfer some sub-system to the environment. We define reduced
versions of quantum communication rates and further, prove new upper bounds on
one-way quantum secret key, distillable entanglement and quantum channel
capacity by means of their reduced versions. It is shown that in some cases
they drastically improve their estimation.Comment: 6 pages, RevTe
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