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Stars as Laboratories for Fundamental Physics - MPP Theory Group

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Solar Neutrinos 371<br />

Table 10.9. Current and near-future solar neutrino experiments.<br />

Experiment Operation a Detection Thresh. Solar Me<strong>as</strong>urement c Prediction<br />

from until [MeV] flux BP95 TL93<br />

Homestake 1967 () Radiochemical 0.814 not pp 2.55 ± 0.25 9.3 +1.2<br />

−1.4 6.4 ± 1.4<br />

νe 37 Cl → 37 Ar e SNU<br />

SAGE 1990 () Radiochemical 0.233 all 74 ± 14 SNU 137 +8<br />

−7 123 ± 7<br />

νe 71 Ga → 71 Ge e 77 ± 10 SNU ... ...<br />

GALLEX 1991 () ... ... ...<br />

8<br />

Kamiokande II 1987 (1996) H2O Cherenkov 7 B 2.89 ± 0.41 6.6<br />

+0.9<br />

−1.1 4.4 ± 1.1<br />

νx e → e νx ( b ) × 10 6 cm −2 s −1<br />

Superkamiok. (1996) () ... 5 ... — ... ...<br />

SNO (1996) () D2O Cherenkov 8<br />

B — ... ...<br />

νe d → p p e (1.44)<br />

νx e → e νx ( b ) 5<br />

νx d → p n νx ( b ) 2.225<br />

7<br />

BOREXINO (1997) () Scintillator 0.25 Be — 5.2<br />

+0.3<br />

−0.4 —<br />

νx e → e νx ( b ) × 10 9 cm −2 s −1<br />

a In brackets anticipated.<br />

b ν x = νe, νµ, or ντ .<br />

c Statistical and systematic 1σ errors added in quadrature.<br />

BP95 = Bahcall and Pinsonneault (1995), with helium and metal diffusion.<br />

TL93 = Turck-Chièze and Lopes (1993), no diffusion.

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