99 research outputs found
Manual and Electrical Energies in the Visualisation of “Electrical Calcutta”, c. 1890-1925
Through examinations of domestic servants in electrical advertisements and writings this article looks at the imaginations and realities of visions of an “Electrical Calcutta” at the turn of the twentieth century. It argues that the diverse conceptions of an “Electrical Calcutta” were intimately linked to not just the technological and mechanical benefits of electrical technologies, but also the centrality of servants to societal notions of morality, class and social hierarchy, and cultures and discourses of human bodies, labour and energy within the domestic sphere.publishedVersio
Probing mass orderings in presence of a very light sterile neutrino in a liquid argon detector
Results from experiments like LSND and MiniBooNE hint towards the possible
presence of an extra eV scale sterile neutrino. The addition of such a neutrino
will significantly impact the standard three flavour neutrino oscillations. In
particular, it can give rise to additional degeneracies due to additional
sterile parameters. For an eV scale sterile neutrino, the cosmological
constraints dictate that the sterile state is heavier than the three active
states. However, for lower masses of sterile neutrinos, it can be lighter than
one and/or more of the three states. In such cases, the mass ordering of the
sterile neutrinos also becomes unknown along with the mass ordering of the
active states. In this paper, we explore the mass ordering sensitivity in the
presence of a sterile neutrino assuming the mass squared difference
to be in the range eV. We study (i) how the
ordering of the active states, i.e. the determination of the sign of
gets affected by the presence of a sterile neutrino in the above
mass range, (ii) the possible determination of the sign of for
in the range eV. This analysis is done in the
context of a liquid argon detector using both beam neutrinos traveling a
distance of 1300 km and atmospheric neutrinos which propagates through a
distance ranging from 10 - 10000 km allowing resonant matter effects. Apart
from presenting separate results from these sources, we also do a combined
study and probe the synergy between these two in giving an enhanced
sensitivity.Comment: 14 pages, 19 figure
Optimal configurations of the Deep Underground Neutrino Experiment
We perform a comprehensive study of the ability of the Deep Underground Neutrino Experiment (DUNE) to answer outstanding questions in the neutrino sector. We consider the sensitivities to the mass hierarchy, the octant of [Formula: see text] and to CP violation using data from beam and atmospheric neutrinos. We evaluate the dependencies on the precision with which [Formula: see text] will be measured by reactor experiments, on the detector size, beam power and exposure time, on detector magnetization, and on the systematic uncertainties achievable with and without a near detector. We find that a 35 kt far detector in DUNE with a near detector will resolve the eightfold degeneracy that is intrinsic to long baseline experiments and will meet the primary goals of oscillation physics that it is designed for. </jats:p
Search for Boosted Dark Matter at ProtoDUNE
We propose the first experimental test of the inelastic boosted dark matter
hypothesis, capitalizing on the new physics potential with the imminent data
taking of the ProtoDUNE detectors. More specifically, we explore various
experimental signatures at the cosmic frontier, arising in boosted dark matter
scenarios, i.e., relativistic, inelastic scattering of boosted dark matter
often created by the annihilation of its heavier component which usually
comprises of the dominant relic abundance. Although features are unique enough
to isolate signal events from potential backgrounds, vetoing a vast amount of
cosmic background is rather challenging as the detectors are located on the
ground. We argue, with a careful estimate, that such backgrounds nevertheless
can be well under control by performing dedicated analyses after data
acquisition. We then discuss some phenomenological studies which can be
achieved with ProtoDUNE, employing a dark photon scenario as our benchmark
dark-sector model.Comment: Supplemental material include
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