Updated global 3+1 analysis of short-baseline neutrino oscillations | |
Gariazzo, S; Giunti, C; Laveder, M; Li, YF![]() ![]() | |
刊名 | JOURNAL OF HIGH ENERGY PHYSICS
![]() |
2017 | |
期号 | 6页码:135 |
关键词 | Neutrino Physics Beyond Standard Model |
ISSN号 | 1029-8479 |
DOI | 10.1007/JHEP06(2017)135 |
文献子类 | Article |
英文摘要 | We present the results of an updated fit of short-baseline neutrino oscillation data in the framework of 3+1 active-sterile neutrino mixing. We first consider v(e) and (v) over bar (e) disappearance in the light of the Gallium and reactor anomalies. We discuss the implications of the recent measurement of the reactor (v) over bar (e) spectrum in the NEOS experiment, which shifts the allowed regions of the parameter space towards smaller values of |U-e1|(2). The beta-decay constraints of the Mainz and Troitsk experiments allow us to limit the oscillation length between about 2 cm and 7 m at 3 sigma for neutrinos with an energy of 1 MeV. The corresponding oscillations can be discovered in a model-independent way in ongoing reactor and source experiments by measuring v(e) and (v) over bar (e), disappearance as a function of distance. We then consider the global fit of the data on short-baseline v(mu)((-)) -> v(e)((-)) transitions in the light of the LSND anomaly, taking into account the constraints from v(e)(( )) and v(mu)((-)) disappearance experiments, including the recent data of the MINOS and IceCube experiments. The combination of the NEOS constraints on |U-e4|(2) and the MINOS and IceCube constraints on |U-mu 4|(2) lead to an unacceptable appearance-disappearance tension which becomes tolerable only in a pragmatic fit which neglects the MiniBooNE low-energy anomaly. The minimization of the global chi(2) in the space of the four mixing parameters Delta m(41)(2), |U-e4|(2), |U-mu 4|(2) and |U-4 tau|(2) leads to three allowed regions with narrow Delta m(41)(2) widths at Delta m(41)(2) approximate to 1.7 (best-fit), 1.3 (at 2 sigma), 2.4 (at 3 sigma) eV(2). The effective amplitude of short-baseline v(mu)((-)) -> v(e)((-)) oscillations is limited by 0.00048 less than or similar to sin(2) 2 nu(e mu) less than or similar to 0.0020 at 3 sigma The restrictions of the allowed regions of the mixing parameters with respect to our previous global fits are mainly due to the NEOS constraints. We present a comparison of the allowed regions of the mixing parameters with the sensitivities of ongoing experiments, which show that it is likely that these experiments will determine in a definitive way if the reactor, Gallium and LSND anomalies are due to active-sterile neutrino oscillations or not. |
WOS关键词 | NUCLEAR-POWER-PLANT ; FISSION-PRODUCTS ; CROSS-SECTION ; REACTOR ; SEARCH ; MASS ; SPECTRUM ; PHENOMENOLOGY ; APPEARANCE ; PARAMETERS |
WOS研究方向 | Physics |
语种 | 英语 |
WOS记录号 | WOS:000404627200001 |
内容类型 | 期刊论文 |
源URL | [http://ir.ihep.ac.cn/handle/311005/284494] ![]() |
专题 | 高能物理研究所_实验物理中心 |
作者单位 | 中国科学院高能物理研究所 |
推荐引用方式 GB/T 7714 | Gariazzo, S,Giunti, C,Laveder, M,et al. Updated global 3+1 analysis of short-baseline neutrino oscillations[J]. JOURNAL OF HIGH ENERGY PHYSICS,2017(6):135. |
APA | Gariazzo, S,Giunti, C,Laveder, M,Li, YF,&李玉峰.(2017).Updated global 3+1 analysis of short-baseline neutrino oscillations.JOURNAL OF HIGH ENERGY PHYSICS(6),135. |
MLA | Gariazzo, S,et al."Updated global 3+1 analysis of short-baseline neutrino oscillations".JOURNAL OF HIGH ENERGY PHYSICS .6(2017):135. |
个性服务 |
查看访问统计 |
相关权益政策 |
暂无数据 |
收藏/分享 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论