Ontology type: schema:ScholarlyArticle Open Access: True
2013-04-02
AUTHORSAnushree Ghosh, Tarak Thakore, Sandhya Choubey
ABSTRACTThe relatively large measured value of θ13 has opened up the possibility of determining the neutrino mass hierarchy through earth matter effects. Amongst the current accelerator-based experiments only NOvA has a long enough baseline to observe earth matter effects. However, NOvA is plagued with uncertainty on the knowledge of the true value of δCP, and this could drastically reduce its sensitivity to the neutrino mass hierarchy. The earth matter effect on atmospheric neutrinos on the other hand is almost independent of δCP. The 50 kton magnetized Iron CALorimeter at the India-based Neutrino Observatory (ICAL@INO) will be observing atmospheric neutrinos. The charge identification capability of this detector gives it an edge over others for mass hierarchy determination through observation of earth matter effects. We study in detail the neutrino mass hierarchy sensitivity of the data from this experiment simulated using the NUANCE based generator developed for ICAL@INO and folded with the detector resolutions and efficiencies obtained by the INO collaboration from a full Geant4-based detector simulation. The data from ICAL@INO is then combined with simulated data from T2K, NOvA, Double Chooz, RENO and Daya Bay experiments and a combined sensitivity study to the mass hierarchy is performed. With 10 years of ICAL@INO data combined with T2K, NOvA and reactor data, one could get about 2.3σ-5.7σ discovery of the neutrino mass hierarchy, depending on the true value of sin2θ23 [0.4-0.6], sin2 2θ13 [0.08-0.12] and δCP [0-2π]. More... »
PAGES9
http://scigraph.springernature.com/pub.10.1007/jhep04(2013)009
DOIhttp://dx.doi.org/10.1007/jhep04(2013)009
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