2013: SOX: Short distance neutrino Oscillations with BoreXino

misiaszek — Wed, 18 Sep 2013 14:20:42 +0000

G. Bellini et al. M. Wójcik, G. Zuzel, M. Misiaszek
JHEP 08 (2013) 038

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http://dx.doi.org/10.1007/JHEP08(2013)038

Abstract

The very low radioactive background of the Borexino detector, its large size, and the well proved capability to detect both low energy electron neutrinos and antineutrinos make an ideal case for the study of short distance neutrino oscillations with artificial sources at Gran Sasso.

This paper describes the possible layouts of ⁵¹Cr (ν _e) and ¹⁴⁴Ce-¹⁴⁴Pr source experiments in Borexino and shows the expected sensitivity to eV mass sterile neutrinos for three possible different phases of the experiment. Expected results on neutrino magnetic moment, electroweak mixing angle, and couplings to axial and vector currents are shown too.

2012: Absence of day-night asymmetry of 862 keV Be-7 solar neutrino rate in Borexino and MSW oscillation

misiaszek — Fri, 04 Nov 2011 20:21:43 +0000

Physics Letters B
Volume 707, Issue 1, 16 January 2012, Pages 22–26

G. Bellini et al. (Borexino Collaboration) M. Wójcik, G. Zuzel, M. Misiaszek

Download: http://www.sciencedirect.com/science/article/pii/S037026931101389X

Abstract

We report the result of a search for a day–night asymmetry in the 7Be solar neutrino interaction rate in the Borexino detector at the Laboratori Nazionali del Gran Sasso (LNGS) in Italy. The measured asymmetry is Adn=0.001±0.012 (stat)±0.007 (syst), in agreement with the prediction of MSW-LMA solution for neutrino oscillations. This result disfavors MSW oscillations with mixing parameters in the LOW region at more than 8.5 σ. This region is, for the first time, strongly disfavored without the use of reactor anti-neutrino data and therefore the assumption of CPT symmetry. The result can also be used to constrain some neutrino oscillation scenarios involving new physics.

Zakład Doświadczalnej Fizyki Komputerowej » neutrino oscillations

2013: SOX: Short distance neutrino Oscillations with BoreXino

2012: Absence of day-night asymmetry of 862 keV Be-7 solar neutrino rate in Borexino and MSW oscillation