Backgrounds in Neutrino Appearance Signal at MiniBooNE

The MiniBooNE (Booster Neutrino Experiment) experiment is a precise search for neutrino oscillations but is crucially sensitive to background processes that would mimic an oscillation signal. The background sources include intrinsic $\nu_{e}$ from kaon and muon decays, mis-identified $\pi^{0}$, gammas from radiative delta decays, and muon neutrino events mis-identified as electrons. A summary of these backgrounds and the tools to handle them is presented.Comment: To appear in Proceedings of PANIC 2005 Conference, October 2005, Santa Fe, New Mexico. 4 pages 3 figure

MiniBooNE Oscillation Results

These proceedings summarize the MiniBooNE $\nu_{\mu} \to \nu_e$ results, describe the first $\bar{\nu}_{\mu} \to \bar{\nu}_e$ result, and current analysis effort with the NuMI neutrinos detected in the MiniBooNE detector.Comment: Rencontres de Moriond EW 2009 (The XLIVth Rencontres de Moriond session Electroweak Interactions And Unified Theories) Proceeding

Neutrino Oscillation Search at MiniBooNE

This article reports the status of a $\nu_{\mu} \to \nu_{e}$ oscillation search in MiniBooNE (Booster Neutrino Experiment) experiment. If an appearance signal is observed, it will imply Physics Beyond the Standard Model such as the existence of light sterile neutrino.Comment: 6 pages, 4 figures. Plenary talk at the Neutrino Oscillation Workshop (NOW2006), September 2006, to be published in Nucl.Phys. B (Proc. Suppl.

Review of Reactor Antineutrino Experiments

As discussed elsewhere, the measurement of a non-zero value for $\theta_{13}$ would open up a wide range of possibilities to explore CP-violation and the mass hierarchy. Experimental methods to measure currently the unknown mixing angle $\theta_{13}$ include accelerator searches for the $\nu_{e}$ appearance and precise measurements of reactor antineutrino disappearance. The reactor antineutrino experiments are designed to search for a non-vanishing mixing angle $\theta_{13}$ with unprecedented sensitivity. This document describes current reactor antineutrino experiments and synergy between accelerator searches for the $\nu_{e}$ appearance and precise measurements of reactor antineutrino disappearance.Comment: 8 pages, 2 figures, Review talk given at NuFact 2011, XIIIth InternationalWorkshop on Neutrino Factories, Super beams and Beta beams, CERN/UNIGE, Geneva, Switzerland, August 1-6, 201

MiniBooNE Oscillation Results 2011

The MiniBooNE neutrino oscillation search experiment at Fermilab has recently updated results from a search for $\bar\nu_\mu \rightarrow \bar\nu_e$ oscillations, using a data sample corresponding to $8.58 \times 10^{20}$ protons on target in anti-neutrino mode. This high statistics result represent an increase in statistics of 52% compared to result published in 2010. An excess of 57.7 $\pm$ 28.5 events is observed in the energy range 200 MeV $< E_\nu <$ 3000 MeV. The data favor LSND-like $\bar\nu_\mu \rightarrow \bar\nu_e$ oscillations over a background only hypothesis at 91.1% confidence level in the energy range 475 $< E_\nu<$3000 MeV.Comment: 4 pages, 6 figures, talk given at NuFact 2011, XIIIth InternationalWorkshop on Neutrino Factories, Super beams and Beta beams, CERN/UNIGE, Geneva, Switzerland, August 1-6, 201

Novel Technique for Ultra-sensitive Determination of Trace Elements in Organic Scintillators

A technique based on neutron activation has been developed for an extremely high sensitivity analysis of trace elements in organic materials. Organic materials are sealed in plastic or high purity quartz and irradiated at the HFIR and MITR. The most volatile materials such as liquid scintillator (LS) are first preconcentrated by clean vacuum evaporation. Activities of interest are separated from side activities by acid digestion and ion exchange. The technique has been applied to study the liquid scintillator used in the KamLAND neutrino experiment. Detection limits of <2.4X10**-15 g 40K/g LS, <5.5X10**-15 g Th/g LS, and <8X10**-15 g U/g LS have been achieved.Comment: 16 pages, 3 figures, accepted for publication in Nuclear Instruments and Methods