Bulk neutrinos as an alternative cause of the gallium and reactor anti-neutrino anomalies

Abstract

2012Bulk neutrinos as an alternative cause of the gallium and reactor anti-neutrino anomalies PHYSICAL REVIEW D, COLLEGE PK, v. 85, n. 7, supl. 1, Part 3, pp. 36-41, APR 20, 2012 We consider an alternative explanation for the deficit of e in Ga solar neutrino calibration experiments and of the " e in short-baseline reactor experiments by a model where neutrinos can oscillate into sterile Kaluza-Klein modes that can propagate in compactified submicrometer flat extra dimensions. We have analyzed the results of the gallium radioactive source experiments and 19 reactor experiments with baseline shorter than 100 m, and showed that these data can be fit into this scenario. The values of the lightest neutrino mass and of the size of the largest extra dimension that are compatible with these experiments are mostly not excluded by other neutrino oscillation experiments.

Large extra dimensions at the Deep Underground Neutrino Experiment

“…The green regions are preferred at 95% CL by short-baseline oscillation experiments according to analysis published in Ref. [19]. All these curves have, to zeroth order, the same shape as the exclusion curve we obtain for DUNE.…”

“…We also include the 90% CL line from sensitivity analysis of KATRIN (burgundy) [16]. The shaded green regions are preferred at 95% CL by the reactor anomaly seen in reactor and Gallium experiments [19]. The gray shaded regions are excluded by the measurements of ∆m effective mixing angle which governs most oscillation phenomena, as discussed in Ref.…”

“…[12][13][14][15][16][17][18]). It has also been proposed [19] that the reactor anomaly can be explained within the LED framework. More generically, the equivalence between the LED model and a framework with several sterile neutrinos was discussed in [20].…”

Fenomenologia De Neutrinos E Física Além Do Modelo Padrão

“…Neste cálculo encontramos os seguintes valores para os χ Uma discussão sobre as possíveis causas desta anomalia pode ser encontrada no artigo [50]. Em [57] propomos uma interpretação para esta anomalia juntamente com a anomalia nos experimentos de calibração GALLEX e SAGE, que serão apresentados na próxima seção. Esta proposta será discutida no capítulo 6 desta tese.…”

“…A tese baseia-se nos dois trabalhos feitos em colaboração [56,57] [58,59,60,61]. O grupo de simetria do modelo padrãoé: Um fato importante que vale a pena comentaré que, a escolha do grupo de gauge permite determinar quais são os campos vetoriais da teoria, seus termos cinéticos e de auto-interação (através do tensor de força), e como se dá o acoplamento entre estes campos e os demais campos do modelo padrão (através da derivada covariante).…”