We present the simultaneous measurement of the interaction rates R-pp, R-Be, R-pep of pp, Be-7, and pep solar neutrinos performed with a global fit to the Borexino data in an extended energy range (0.19-2.93) MeV with particular attention to details of the analysis methods. This result was obtained by analyzing 1291.51 days of Borexino Phase-II data, collected after an extensive scintillator purification campaign. Using counts per day (cpd)/100 ton as unit, we find R-pp = 134 +/- 10(stat)(-10)(+6)(sys), R-Be = 48.3 +/- 1.1(stat)(-0.7)(+0.4)(sys); and R-pep(HZ) = 2.43 +/- 0.36(stat)(-0.22)(+0.15)(sys) assuming the interaction rate R-CNO of CNO-cycle (Carbon, Nitrogen, Oxigen) solar neutrinos according to the prediction of the high metallicity standard solar model, and R-pep(LZ) = 2.65 +/- 0.36(stat)(-0.24)(+0.15)(sys) according to that of the low metallicity model. An upper limit R-CNO < 8.1 cpd/100 ton (95% C.L.) is obtained by setting in the fit a constraint on the ratio R-pp/R-pep (47.7 +/- 0.8 cpd/100 ton or 47.5 +/- 0.8 cpd/100 ton according to the high or low metallicity hypothesis).

Simultaneous precision spectroscopy of pp, Be 7, and pep solar neutrinos with Borexino Phase-II

Di Noto L.;Pallavicini M.;
2019-01-01

Abstract

We present the simultaneous measurement of the interaction rates R-pp, R-Be, R-pep of pp, Be-7, and pep solar neutrinos performed with a global fit to the Borexino data in an extended energy range (0.19-2.93) MeV with particular attention to details of the analysis methods. This result was obtained by analyzing 1291.51 days of Borexino Phase-II data, collected after an extensive scintillator purification campaign. Using counts per day (cpd)/100 ton as unit, we find R-pp = 134 +/- 10(stat)(-10)(+6)(sys), R-Be = 48.3 +/- 1.1(stat)(-0.7)(+0.4)(sys); and R-pep(HZ) = 2.43 +/- 0.36(stat)(-0.22)(+0.15)(sys) assuming the interaction rate R-CNO of CNO-cycle (Carbon, Nitrogen, Oxigen) solar neutrinos according to the prediction of the high metallicity standard solar model, and R-pep(LZ) = 2.65 +/- 0.36(stat)(-0.24)(+0.15)(sys) according to that of the low metallicity model. An upper limit R-CNO < 8.1 cpd/100 ton (95% C.L.) is obtained by setting in the fit a constraint on the ratio R-pp/R-pep (47.7 +/- 0.8 cpd/100 ton or 47.5 +/- 0.8 cpd/100 ton according to the high or low metallicity hypothesis).
File in questo prodotto:
File Dimensione Formato  
Borex_Long2019_PhysRevD.100.082004.pdf

accesso aperto

Tipologia: Documento in versione editoriale
Dimensione 1.15 MB
Formato Adobe PDF
1.15 MB Adobe PDF Visualizza/Apri

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11567/985061
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 115
  • ???jsp.display-item.citation.isi??? 103
social impact