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Testing for Large Extra Dimensions with Neutrino Oscillations | | P. A. N. Machado
; H. Nunokawa
; R. Zukanovich Funchal
; | | Date: |
29 Dec 2010 | | Abstract: | We consider a model where sterile neutrinos can propagate in a large
compactified extra dimension giving rise to Kaluza-Klein (KK) modes and the
Standard Model left-handed neutrinos are confined to a 4-dimensional spacetime
brane. The KK modes mix with the standard neutrinos modifying their oscillation
pattern. We examine current experiments such as KamLAND and MINOS to estimate
the impact of the possible presence of such KK modes on the determination of
the neutrino oscillation parameters and simultaneously obtain limits on the
size of the largest extra dimension. We found that the presence of the KK modes
do not essentially improve the quality of the fit compared to the case of the
standard oscillation. By combining the results from KamLAND and MINOS, in the
limit of a vanishing lightest neutrino mass, we obtain the stronger bound on
the size of the extra dimension as ~ 0.9 mu m at 99% CL. If the lightest
neutrino mass turn out to be larger, 0.2 eV, for example, we obtain the bound ~
0.2 mu m. We also discuss the expected sensitivities on the size of the extra
dimension for future experiments such as Double CHOOZ, T2K and NOvA. | | Source: | arXiv, 1101.0003 | | Services: | Forum | Review | PDF | Favorites | |
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