4,563 research outputs found
Study of leptonic CP violation
The "complementary" Ansatz, Tr, where is the prediagonal
neutrino mass matrix, seems a plausible approximation for capturing in a
self-contained way some of the content of Grand Unification. We study its
consequences in the form of relations between the neutrino masses and CP
violation phases.Comment: 8 pages, 1 figure, talk at MRST200
A potential test of the CP properties and Majorana nature of neutrinos
The scattering of solar neutrinos on electrons may reveal their CP
properties, which are particularly sensitive to their Majorana nature. The
cross section is sensitive to the neutrino dipole moments through an
interference of electro-magnetic and weak amplitudes. We show how future solar
neutrino experiments with good angular resolution and low energy threshold,
such as Hellaz, can be sensitive to the resulting azimuthal asymmetries in
event number, and could therefore provide valuable information on the CP
properties and the nature of the neutrinos, provided the solar magnetic field
direction is fixed.Comment: 14 pages, 1 figure, eq. (19) corrected. Version to be publishe
A study of high frequency nonlinear combustion instability in baffled annular liquid propellant rocket motors. Volume 2 - A user manual for computer programs TRDL and TRDPLT Final report, 25 Aug. 1969 - 25 Sep. 1970
User manual for computer programs to determine high frequency instability in baffled annular liquid propellant rocket engines - Vol.
A study of high frequency nonlinear combustion instability in baffled annular liquid propellant rocket motors, volume 1 Final report, 25 Aug. 1969 - 25 Sep. 1970
High frequency nonlinear combustion instability in baffled annular liquid propellant rocket engines - Vol.
Vote-Buying and Reciprocity
While vote-buying is common, little is known about how politicians determine who to target. We argue that vote-buying can be sustained by an internalized norm of reciprocity. Receiving money engenders feelings of obligation. Combining survey data on vote-buying with an experiment-based measure of reciprocity, we show that politicians target reciprocal individuals. Overall, our findings highlight the importance of social preferences in determining political behavior.vote-buying, reciprocity, redistributive politics, voting, social preferences
Analytical study of control devices for high amplitude combustion instability Quarterly report
Mathematical model and analysis of combustion processes in annular rocket engines for control of high amplitude combustion instabilit
Generation of boundary and boundary-layer fitting grids
The details of extended physical processes, such as the gas dynamic flow over an airfoil, the reactive flow through a combustor, or the electric field in a multi-contact transistor, are understood by solving the differential equations of a mathematical model of the process. The accuracy of finite difference methods for the numerical solution of the equations is increased if the underlying mesh fits the region boundaries and is closely spaced in regions where the solution is rapidly varying. Automatic methods for producing a satisfactorily adjusted mesh were developed for one dimensional problems. In one simple, effective scheme of this kind the unknown function and the distribution of mesh modes are found simultaneously, the nodes being placed so that they correspond to points uniformly spaced on the solution curve. In a two dimensional generalization, the nodes correspond to points equally spaced on the solution surface in two directions that are as nearly orthogonal as possible. Examples of such meshes are shown
Leptonic CP violation in a two parameter model
We further study the "complementary" Ansatz, Tr=0, for a prediagonal
light Majorana type neutrino mass matrix. Previously, this was studied for the
CP conserving case and the case where the two Majorana type CP violating phases
were present but the Dirac type CP violating phase was neglected. Here we
employ a simple geometric algorithm which enables us to "solve" the Ansatz
including all three CP violating phases. Specifically, given the known neutrino
oscillation data and an assumed two parameter (the third neutrino mass
and the Dirac CP phase ) family of inputs we predict the neutrino
masses and Majorana CP phases. Despite the two parameter ambiguity, interesting
statements emerge.
There is a characteristic pattern of interconnected masses and CP phases. For
large the three neutrinos are approximately degenerate. The only
possibility for a mass hierarchy is to have smaller than the other two. A
hierarchy with largest is not allowed.
Small CP violation is possible only near two special values of . Also,
the neutrinoless double beta decay parameter is approximately bounded as 0.020
eV 0.185 eV. As a byproduct of looking at physical amplitudes we
discuss an alternative parameterization of the lepton mixing matrix which
results in simpler formulas. The physical meaning of this parameterization is
explained.Comment: 12 pages, 1 figur
Analysis of error growth and stability for the numerical integration of the equations of chemical kinetics
Error growth and stability analyzed for numerical integration of differential equations in chemical kinetic
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