15,104 research outputs found
Pinning down neutrino oscillation parameters in the 2-3 sector with a mgnetised atmospheric neutrino detector: a new study
We determine the sensitivity to neutrino oscillation parameters from a study
of atmospheric neutrinos in a magnetised detector such as the ICAL at the
proposed India-based Neutrino Observatory. In such a detector that can {\em
separately} count and -induced events, the
relatively smaller (about 5\%) uncertainties on the neutrino--anti-neutrino
flux ratios translate to a constraint in the analysis that results in
a significant improvement in the precision with which neutrino oscillation
parameters such as can be determined. Such an effect is
unique to all magnetisable detectors and constitutes a great advantage in
determining neutrino oscillation parameters using such detectors. Such a study
has been performed for the first time here. Along with an increase in the
kinematic range compared to earlier analyses, this results in sensitivities to
oscillation parameters in the 2--3 sector that are comparable to or better than
those from accelerator experiments where the fluxes are significantly higher.
For example, the precisions on and
achievable for 500 kTon yr exposure of ICAL are
and respectively for both normal and inverted
hierarchies. The mass hierarchy sensitivity achievable with this combination
when the true hierarchy is normal (inverted) for the same exposure is
()
Municipal Solid Waste Management in Cities - Issues of Basic Rights of People Surrounding Village and Alternatives
The Study is based on the findings of a three weeklong field study conducted in Villappilsala, a village 14 kms away from Thriuvananthapuram City. The waste disposal plant for treating the Municipal Solid Waste generated in the Thiruvanathapuram City is located here. The study focuses on the health and environmental impacts of the functioning of the plant on the local community and addresses the larger question of necessity for scientific and cost effective alternative methods of waste disposal in the city itself. The disposal of Solid Waste has become a problem calling for more attention in the wake of urban development, which is the consequence of more people settling in the cities. The issue of decentralised and scientific disposal of Solid Waste at household level and at the level of small groups of households is emphasised. The central issue thrown up by this study is the poorer sections of the village folk bearing the brunt of the consequences of the profligate consumption and callous waste disposal habits of the upper classes in the citiesMUNICIPAL SOLID WASTE; BASIC RIGHTS; Villappilsala; health and environmental impacts
Boosting Higgs CP properties via VH Production at the Large Hadron Collider
We consider ZH and WH production at the Large Hadron Collider, where the
Higgs decays to a bb pair. We use jet substructure techniques to reconstruct
the Higgs boson and construct angular observables involving leptonic decay
products of the vector bosons. These efficiently discriminate between the
tensor structure of the HVV vertex expected in the Standard Model and that
arising from possible new physics, as quantified by higher dimensional
operators. This can then be used to examine the CP nature of the Higgs as well
as CP mixing effects in the HZZ and HWW vertices separately.Comment: 5 pages, 3 figures. v2: two references added and typo correcte
Infinite randomness and quantum Griffiths effects in a classical system: the randomly layered Heisenberg magnet
We investigate the phase transition in a three-dimensional classical
Heisenberg magnet with planar defects, i.e., disorder perfectly correlated in
two dimensions. By applying a strong-disorder renormalization group, we show
that the critical point has exotic infinite-randomness character. It is
accompanied by strong power-law Griffiths singularities. We compute various
thermodynamic observables paying particular attention to finite-size effects
relevant for an experimental verification of our theory. We also study the
critical dynamics within a Langevin equation approach and find it extremely
slow. At the critical point, the autocorrelation function decays only
logarithmically with time while it follows a nonuniversal power-law in the
Griffiths phase.Comment: 10 pages, 2 eps figures included, final version as published
New surveys of UBV photometry and absolute proper motions at intermediate latitude
A photometric and proper motion survey has been obtained in 2 directions at
intermediate latitude: (, ;
,) and
(, ; ,
). The survey covers 7.13 and 20.84 square
degrees, respectively. The limiting magnitude is about 18.5 in V for both
directions. We have derived the density laws for stars (M 3.5) as a
function of distance from the galactic plane. The density laws for stars follow
a sum of two exponentials with scale heights of 240 pc (thin disk) and 790 pc
(thick disk), respectively. The local density of thick disk is found to be
6.13 % relative to the thin disk. The kinematical distribution of stars
has been probed to distances up to 3.5 kpc above the galactic plane. New
estimates of the parameters of velocity ellipsoid have been derived for the
thick disk of the Galaxy. A comparison of our data sets with the Besan\c con
model star count predictions has been performed, giving a good agreement in the
magnitude range V = 13 to 18.Comment: 13 pages, 8 PS figures, To appear in A&
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