Mass Hierarchy Determination via future Atmospheric Neutrino Detectors

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dc.creatorGandhi, Raj
dc.creatorGhoshal, Pomita
dc.creatorGoswami, Srubabati
dc.creatorMehta, Poonam
dc.creatorSankar, S Uma
dc.creatorShalgar, Shashank
dc.date2007-07-12
dc.date2007-09-06
dc.date.accessioned2026-07-07T10:56:41Z
dc.date.available2026-07-07T10:56:41Z
dc.descriptionWe study the problem of determination of the sign of Delta m^2_{31}, or the neutrino mass hierarchy, through observations of atmospheric neutrinos in future detectors. We consider two proposed detector types : (a) Megaton sized water Cerenkov detectors, which can measure the survival rates of nu_μ+ \barν_μand nu_e + \barν_e and (b) 100 kton sized magnetized iron detectors, which can measure the survival rates of ν_μand \barν_μ. For energies and path-lengths relevant to atmospheric neutrinos, these rates obtain significant matter contributions from P_{μe}, P_{μμ} and P_{ee}, leading to an appreciable sensitivity to the hierarchy. We do a binned χ^2 analysis of simulated data in these two types of detectors which includes the effect of smearing in neutrino energy and direction and incorporates detector efficiencies and relevant statistical, theoretical and systematic errors. We also marginalize the χ^2 over the allowed ranges of neutrino parameters in order to accurately account for their uncertainties. Finally, we compare the performance of both types of detectors vis a vis the hierarchy determination.
dc.description36 pages, 13 figures, revised version accepted in Physical Review D
dc.identifierhttps://arxiv.org/abs/0707.1723
dc.identifierhttp://arxiv.org/abs/0707.1723
dc.identifierPhys.Rev.D76:073012,2007
dc.identifierdoi:10.1103/PhysRevD.76.073012
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/186494
dc.subjectHigh Energy Physics - Phenomenology
dc.subjectHigh Energy Physics - Experiment
dc.titleMass Hierarchy Determination via future Atmospheric Neutrino Detectors
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