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Resolving the mass hierarchy with atmospheric neutrinos using a liquid argon detector

DSpace at IIT Bombay

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Title Resolving the mass hierarchy with atmospheric neutrinos using a liquid argon detector
 
Creator GANDHI, R
GHOSHAL, P
GOSWAMI, S
SANKAR, SU
 
Subject oscillations
theta(13)
tpc
 
Description We explore the potential offered by large-mass liquid argon detectors for determination of the sign of Delta m(31)(2), or the neutrino mass hierarchy, through interactions of atmospheric neutrinos. We give results for a 100 kT sized magnetized detector which provides separate sensitivity to nu(mu), (nu)overbar(mu) and, over a limited energy range, to nu(e), (nu)overbar(e). We also discuss the sensitivity for the unmagnetized version of such a detector. After including the effect of smearing in neutrino energy and direction and incorporating the relevant statistical, theoretical, and systematic errors, we perform a binned chi(2) analysis of simulated data. The chi(2) is marginalized over the presently allowed ranges of neutrino parameters and determined as a function of theta(13). We find that such a detector offers superior capabilities for hierarchy resolution, allowing a > 4 sigma determination for a 100 kT detector over a 10-year running period for values of sin(2)2 theta(13)>= 0.05. For an unmagnetized detector, a 2.5 sigma hierarchy sensitivity is possible for sin(2)2 theta(13)=0.04.
 
Publisher AMER PHYSICAL SOC
 
Date 2011-07-16T23:34:17Z
2011-12-26T12:50:00Z
2011-12-27T05:35:55Z
2011-07-16T23:34:17Z
2011-12-26T12:50:00Z
2011-12-27T05:35:55Z
2008
 
Type Article
 
Identifier PHYSICAL REVIEW D, 78(7), -
1550-7998
http://dx.doi.org/10.1103/PhysRevD.78.073001
http://dspace.library.iitb.ac.in/xmlui/handle/10054/4560
http://hdl.handle.net/10054/4560
 
Language en