TY  - JOUR
AU  - Borexino Collaboration (Bellini, G. et al
AU  - Pena-Garay, C.
PY  - 2012
DA  - 2012//
TI  - Absence of a day-night asymmetry in the Be-7 solar neutrino rate in Borexino
T2  - Phys. Lett. B
JO  - Physics Letters B
SP  - 22
EP  - 26
VL  - 707
IS  - 1
PB  - Elsevier Science Bv
KW  - Solar neutrinos
KW  - Day-night effect
KW  - CPT violation
KW  - Neutrino oscillations
AB  - We report the result of a search for a day-night asymmetry in the Be-7 solar neutrino interaction rate in the Borexino detector at the Laboratori Nazionali del Gran Sasso (LNGS) in Italy. The measured asymmetry is A(dn) = 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 sigma. 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.
SN  - 0370-2693
UR  - http://arxiv.org/abs/1104.2150
UR  - https://doi.org/10.1016/j.physletb.2011.11.025
DO  - 10.1016/j.physletb.2011.11.025
LA  - English
N1  - WOS:000299757000004
ID  - BorexinoCollaborationBellini+Pena-Garay2012
ER  -