Stars as Laboratories for Fundamental Physics - MPP Theory Group

370 Chapter 10
Table 10.8. Predicted flux of 8 B neutrinos at Earth. For BP92, the uncertainty
is a “theoretical 3σ error.”
Model Diffusion 8 B Flux [10 6 cm −2 s −1 ]
BP95 He, metals 6.6 +0.9
−1.1
BP92 He 5.7 ± 2.4
BP92 — 5.1 ± 2.2
TL93 — 4.4 ± 1.1
BP95 = Bahcall and Pinsonneault (1995).
BP92 = Bahcall and Pinsonneault (1992).
TL93 = Turck-Chièze and Lopes (1993).
Fig. 10.15. Measured 8 B solar neutrino flux at Kamiokande (Suzuki 1993).
The shaded band gives the average with 1σ statistical and systematic errors
added in quadrature.
Next, one may determine the absolute flux of solar 8 B neutrinos.
As a function of time it is shown in Fig. 10.15. Assuming that the
spectrum is indeed that of 8 B neutrinos, the measured flux from the
data of January 1987 until July 1993 is (units 10 6 cm −2 s −1 )
2.89 + 0.22/−0.21 stat ± 0.35 syst = 2.89 ± 0.41 (10.20)
where the errors were added in quadrature. This measurement is to be
compared with the predictions shown in Tab. 10.8