85 research outputs found

    Manual and Electrical Energies in the Visualisation of “Electrical Calcutta”, c. 1890-1925

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    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

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    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 Δ41|\Delta_{41}| to be in the range 104110^{-4} - 1 eV2^2. We study (i) how the ordering of the active states, i.e. the determination of the sign of Δ31\Delta_{31} gets affected by the presence of a sterile neutrino in the above mass range, (ii) the possible determination of the sign of Δ41\Delta_{41} for Δ41\Delta_{41} in the range 1040.110^{-4} - 0.1 eV2^2. 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

    Search for Boosted Dark Matter at ProtoDUNE

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    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