Testing for large extra dimensions with neutrino oscillations

被引：39

作者：

Machado, P. A. N. ^{[1
]}

Nunokawa, H. ^{[2
]}

Funchal, R. Zukanovich ^{[1
]}

机构：

[1] Univ Sao Paulo, Inst Fis, BR-05315970 Sao Paulo, Brazil

[2] Pontificia Univ Catolica Rio de Janeiro, Dept Fis, BR-22452970 Rio De Janeiro, Brazil

来源：

PHYSICAL REVIEW D | 2011年 / 84卷 / 01期

基金：

巴西圣保罗研究基金会;

关键词：

LONG-BASE-LINE; SOLAR; PARAMETERS; HIERARCHY; SEARCH; MODELS; FLUX;

D O I：

10.1103/PhysRevD.84.013003

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

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 former and current experiments such as CHOOZ, 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 does not essentially improve the quality of the fit compared to the case of the standard oscillation. By combining the results from CHOOZ, 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 similar to 1.0(0.6) mu m at 99% C.L. for normal (inverted) mass hierarchy. If the lightest neutrino mass turns out to be larger, 0.2 eV, for example, we obtain the bound similar to 0.1 mu m. We also discuss the expected sensitivities on the size of the extra dimension for future experiments such as Double CHOOZ, T2K, and NO nu A.

引用

页数：14

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