Tests of Lorentz and CPT violation with MiniBooNE neutrino oscillation excesses

18th International Symposium on Particles Strings and Cosmology

Katori, Teppei^1

Laboratory for Nuclear Science, Massachusetts Institute of Technology, Cambridge, MA 02139, United States^1

关键词: Lorentz violations;    Neutrino oscillations;    Short base lines;    Statistical significance;    The standard model;    Time dependence;    Time-dependent solutions;    Time-independent solutions;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/485/1/012041/pdf
DOI  :  10.1088/1742-6596/485/1/012041

来源: IOP

【 摘 要 】

Lorentz and CPT symmetry violaton is a predicted phenomenon of Planck-scale physics. Various types of data are analyzed to search for Lorentz violation under the Standard-Model Extension (SME) framework, including neutrino oscillation data. MiniBooNE is a short-baseline neutrino oscillation experiment at Fermilab. The measured excesses from MiniBooNE cannot be reconciled within the neutrino Standard Model (vSM); thus it might be a signal of new physics, such as Lorentz violation. We have analyzed the sidereal time dependence of MiniBooNE data for signals of the possible sidereal time dependence of the ocillation signals. we find that the veappearance data prefer a sidereal time-independent solution, and theeappearance data slightly prefer a sidereal time-dependent solution, however, the statistical significance is not high to claim the discovery. Limits of order 10-20GeV are placed on combinations of SME coefficients.