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Solar neutrino detection in a large volume double-phase liquid argon experiment | | D. Franco
; C. Giganti
; P. Agnes
; L. Agostino
; B. Bottino
; S. Davini
; S. De Cecco
; A. Fan
; G. Fiorillo
; C. Galbiati
; A. M. Goretti
; E. V. Hungerford
; Al. Ianni
; An. Ianni
; C. Jollet
; L. Marini
; C. J. Martoff
; A. Meregaglia
; L. Pagani
; M. Pallavicini
; E. Pantic
; A. Pocar
; A. L. Renshaw
; B. Rossi
; N. Rossi
; Y. Suvorov
; G. Testera
; A. Tonazzo
; H. Wang
; S. Zavatarelli
; | | Date: |
14 Oct 2015 | | Abstract: | The direct search for dark matter WIMP particles through their interaction
with nuclei at the "neutrino floor" sensitivity, where neutrino-induced
coherent scattering on nuclei starts contributing to the background, requires
detectors capable of collecting exposures of the order of 1~ktonne yr free of
background resulting from beta and gamma decays and cosmogenic and radiogenic
neutrons. The same constraints are required for precision measurements of solar
neutrinos elastically scattering on electrons. Two-phase liquid argon time
projection chambers (LAr TPCs) are prime candidates for the ambitious program
to explore the nature of dark matter. The large target, high scintillation
light yield and good spatial resolution in all three cartesian directions
concurrently allows a high precision measurement of solar neutrino fluxes. We
studied the cosmogenic and radiogenic backgrounds affecting solar neutrino
detection in a 300 tonne (100 tonne fiducial) LAr TPC operating at LNGS depth
(3,800 meters of water equivalent). Such a detector could measure the CNO
neutrino rate with 5 sigma sensitivity, and significantly improve the precision
of the 7Be and pep neutrino rates compared to the currently available results
from the Borexino organic liquid scintillator detector. Measurements with ~2%,
~10% and ~15% precision for 7Be, pep, and CNO neutrinos, respectively, are
possible. | | Source: | arXiv, 1510.4196 | | Services: | Forum | Review | PDF | Favorites | |
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