talk - International Workshop on Double Beta Decay and Neutrino

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7 Be solar neutrino flux in Borexino First measurement: 192 days [PRL 101 091302 (2008)] Rate 7Be = 49 ± 3(stat) ± 4 (sys) events/day/100 ton New results [PRL 107 141302 (2011)] Rate 7Be = 46 ± 1.5 (stat) +1.5 -1.6 (sys) events/ day / 100 ton ➡ Increased statistics (about x4 times) ➡ Lower systematic errors (calibration campaign) ➡
spectral fits • Different fits: - with and without alpha subtraction - Monte Carlo vs analytical - energy scale and resolution • removed muons, Radon delayed coincidences • 210 Bi, 85 Kr, 11 C are free parameters • pp, pep, CNO rates fixed 7 Be ν 46.0 ± 1.5 (stat) +1.5 -1.6 (sys) 85 Kr 31.2 ± 1.7 (stat) ± 4.7 (sys) 210 Bi 41.0 ± 1.5 (stat) ± 2.3 (sys) 11 C 28.5 ± 0.2 (stat) ± 0.7 (sys) Andrea Pocar - DBD11 - November 15, 2011 17
Page 1 and 2: Latest results from Borexino DBD11
Page 3 and 4: Solar Fusion Reactions p-p Solar Fu
Page 5 and 6: neutrino oscillations solar, atmosp
Page 7 and 8: Gran Sasso Perugia Heidelberg Hambu
Page 9 and 10: Borexino L’AQUILA Tunnel of 10.
Page 11 and 12: measurement of the 7 Be solar neutr
Page 13 and 14: detector calibrations 4 campaigns i
Page 15: data reduction and signal extractio
Page 19 and 20: Implication on solar physics • Me
Page 21 and 22: no day/night effect matter effects
Page 23 and 24: 8 B solar neutrinos at low threshol
Page 25 and 26: pep and CNO neutrinos The 125 muo
Page 27 and 28: μ Track three-fold coincidence And
Page 29 and 30: μ Track three-fold coincidence n C
Page 31 and 32: 3-fold coincidence results (not onl
Page 33 and 34: electron/positron pulse shape discr
Page 35 and 36: pep and CNO results Borexino pep
Page 37 and 38: Andrea Pocar Pocar - DBD11 - SiLAFA

talk - International Workshop on Double Beta Decay and Neutrino

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