2,132 research outputs found
A New Solution of the Solar Neutrino Flux
We report a new solution to explain the observed deficit of the solar
neutrino flux by Homestake, Kamiokande II and III, GALLEX and SAGE experiments.
We use the matter mixing and the helicity oscillation in the twisting magnetic
fields in the sun. Our model predicts the short (seasonal) and long (11 years)
time variations of the solar neutrino flux. Three kinds of data observed by
Homestake, Kamiokande, GALLEX and SAGE detectors are reproduced well if the
mixing angle and the squared mass difference are in the small area around
and .Comment: 13 pages and 4 figures (not included), in phyzzx, OU-HET-19
Absorption Probability of De Sitter Horizon for Massless Fields with Spin
The evaluation of the absorption coefficients are important for particle
emission caused by Hawking radiation. In the case of cosmological particle
emission from the event horizon in De Sitter space, it is known that the scalar
wave functions are solved in terms of Legendre functions. For fields with
higher spin, the solution has been examined with low frequency approximation.
We shows that the radial equations of the fields with spin and
can be solved analytically in terms of the hypergeometric functions. We
calculate the absorption probability using asymptotic expansion for high
frequency limit. It turns out that the absorption coefficients are universal to
all bosonic fields; They depend only on the angular momentum and not spin. In
the case of spin fermions, we can also find non-vanishing absorption
probability in contrast to the previously known result.Comment: 7 pages, Late
Classically Integrable Cosmological Models with a Scalar Field
New classes of classically integrable models in the cosmological theories
with a scalar field are obtained by using freedoms of defining time and fields.
In particular, some models with the sum of exponential potentials in the flat
spatial metric are shown to be integrable. The model with the Sine-Gordon
potential can be solved in terms of analytic continuation of the non-periodic
Toda field theory.Comment: 10 pages, Late
A variety of lepton number violating processes related to Majorana neutrino masses
A Majorana type of the neutrino mass matrix induces a class of lepton number
violating processes. Cross sections of these reactions are given in terms of
the neutrino mass matrix element, and a semi-realistic event rate is estimated.
These processes provide mass and mixing parameters not directly accessible by
the neutrino oscillation experiments. If these processes are discovered with a
larger rate than given here, it would imply a new physics of the lepton number
violation not directly related to the Majorana neutrino mass, such as R-parity
violating operators in SUSY models.Comment: 15 pages, 1 figur
Sweeping the Space of Admissible Quark Mass Matrices
We propose a new and efficient method of reconstructing quark mass matrices
from their eigenvalues and a complete set of mixing observables. By a
combination of the principle of NNI (nearest neighbour interaction) bases which
are known to cover the general case, and of the polar decomposition theorem
that allows to convert arbitrary nonsingular matrices to triangular form, we
achieve a parameterization where the remaining freedom is reduced to one
complex parameter. While this parameter runs through the domain bounded by a
circle with radius R determined by the up-quark masses around the origin in the
complex plane one sweeps the space of all mass matrices compatible with the
given set of data.Comment: 18 page
Phenomenological bounds in inclusive neutrino interactions
Using expressions for the and anti charged and neutral current cross sections and the electroproduction structure function integral and positivity requirements of the sea contribution, bounds are obtained on sigma/sup anti nu N//sigma/sup anti nu N/, and sigma/sup anti nu N//sub nc//sigma/sup nu N/ /sub nc/ in the standard model. A bound on sigma/sup anti nu N//sigma/sup nu N/ obtained with a V + A term anti p'/sub mu/(1-)n is used to rule out such a term in the current. A plot of sigma/sup nu N//sub nc/ + sigma/ sup anti nu N//sub nc/ versus sigma/sup nu N//sub nc/ - sigma/sup anti nu N//sub nc/ is introduced to analyze the neutral current data. A new relation connecting moments of y and y distributions at a particular point y/sub n/ for and anti interactions is found. The results do not depend on the neutral current data. (auth
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