2,204 research outputs found
DIVERSIONS FROM THE GREAT LAKES: OPPORTUNITIES AND DANGERS
Resource /Energy Economics and Policy,
DYNAMIC SUPPLY FROM A COMMON PROPERTY RESOURCE: WATER DIVERSIONS FROM THE GREAT LAKES
Resource /Energy Economics and Policy,
ALTERNATIVE PRICE SPECIFICATION FOR MUNICIPAL WATER DEMANDS: AN EMPIRICAL TEST
Based on data from 92 Minnesota cities, the analyses shows that neither marginal price or average price appear as the better predictor of demand. The price elasticity of demand ranges from -. 17 for marginal price in the linear model to -.27 for average price in the log linear model. It appears from the analysis that many consumers are unaware of the marginal price of their water. Thus utilities should simplify their pricing structures and present consumers with an easy to understand costs of water such as the cost of six hours of lawn watering.Demand and Price Analysis, Public Economics,
Neutrino neutral reaction on 4He, effects of final state interaction and realistic NN force
The inelastic neutral reaction of neutrino on 4He is calculated
microscopically, including full final state interaction among the four
nucleons. The calculation is performed using the Lorentz integral transform
(LIT) method and the hyperspherical-harmonic effective interaction approach
(EIHH), with a realistic nucleon-nucleon interaction. A detailed energy
dependent calculation is given in the impulse approximation. With respect to
previous calculations, this work predicts an increased reaction cross-section
by 10%-30% for neutrino temperature up to 15 MeV.Comment: 4 pages, 2 fig
Nondecoupling of Heavy Fermions and a Special Yukawa Texture
Talk based on work entitled ``Yukawa textures, new physics and
nondecoupling,'' done in collaboration with G. C. Branco and J. I.
Silva-Marcos, arXiv:hep-ph/0612252, to appear in Phys. Rev. D. In this work we
pointed out that New Physics can play an important r\^ ole in rescuing some of
the Yukawa texture zero ans\" atze which would otherwise be eliminated by the
recent, more precise measurements of . We have shown that the presence
of an isosinglet vector-like quark which mixes with standard quarks, can render
viable a particularly interesting four texture zero Yukawa ansatz. The crucial
point is the nondecoupling of the effects of the isosinglet quark, even for
arbitrary large values of its mass.Comment: Invited talk at CTP Symposium on Supersymmetry at LHC: Theoretical
and Experimental Prospectives, Cairo, Egypt, 11-14 Mar 200
Effect of P-wave interaction in 6He and 6Li photoabsorption
The total photoabsorption cross sections of six-body nuclei are calculated
including complete final state interaction via the Lorentz Integral Transform
method. The effect of nucleon-nucleon central P-wave forces is investigated.
Comparing to results with central potentials containg S-wave forces only one
finds considerably more strength in the low-energy cross sections and a rather
strong improvement in comparison with experimental data, in particular for 6Li.Comment: 11 pages with 4 figure
Sequestering CP Violation and GIM-Violation with Warped Extra Dimensions
We propose a model of spontaneous CP violation to address the strong CP
problem in warped extra dimensions that relies on sequestering flavor and CP
violation. We assume that brane-localized Higgs Yukawa interactions respect a
U(3) flavor symmetry that is broken only by bulk fermion mass and Yukawa terms.
All CP violation arises from the vev of a CP-odd scalar field localized in the
bulk. To suppress radiative corrections to theta-bar, the doublet quarks in
this model are localized on the IR brane. We calculate constraints from
flavor-changing neutral currents (FCNCs), precision electroweak measurements,
CKM unitarity, and the electric dipole moments in this model and predict
theta-bar to be at least about 10^-12.Comment: 38 page
Inhomogeneity in the Supernova Remnant Distribution as the Origin of the PAMELA Anomaly
Recent measurements of the positron/electron ratio in the cosmic ray (CR)
flux exhibits an apparent anomaly, whereby this ratio increases between 10 and
100 GeV. We show that inhomogeneity of CR sources on a scale of order a kpc,
can naturally explain this anomaly. If the nearest major CR source is about a
kpc away, then low energy electrons ( GeV) can easily reach us. At
higher energies ( GeV), the source electrons cool via synchrotron
and inverse-Compton before reaching Earth. Pairs formed in the local vicinity
through the proton/ISM interactions can reach Earth also at high energies, thus
increasing the positron/electron ratio. A natural origin of source
inhomogeneity is the strong concentration of supernovae in the galactic spiral
arms. Assuming supernova remnants (SNRs) as the sole primary source of CRs, and
taking into account their concentration near the galactic spiral arms, we
consistently recover the observed positron fraction between 1 and 100 GeV.
ATIC's electron excess at GeV is explained, in this picture, as the
contribution of a few known nearby SNRs. The apparent coincident similarity
between the cooling time of electrons at 10 GeV (where the positron/electron
ratio upturn), Myr, and the CRs protons cosmogenic age at the same
energy is predicted by this model
Exploring New Physics with CP Violation in Neutral D and B Decays
If New Physics contributes significantly to neutral meson mixing, then it is
quite likely that it does so in a CP violating manner. In mixing
measured through , CP violation induces a term
with important implications for experiments. For
mixing, a non-vanishing CP asymmetry (above a few percent)
is a clear signal of New Physics.
Interestingly, this would test precisely the same Standard Model ingredients as
the question of whether .Comment: 11 pages, phyzzx, no figures, Talk given at the 6th International
Symposium on Heavy Flavor Physics, Pisa, Ital
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