Improvement of test of solar neutrino coherent scattering with torsion pendulum

摘要

A torsion pendulum containing two sapphire crystals and two lead rings is used to test Weber's theory of enhanced solar neutrino coherent scattering. Our experiment gives a null result for the diurnal force with a noise level of 3.8 x 10(-14) N, which is 526 times smaller than the predicted value of Weber's theory, and directly rules out Weber's theory and the experimental result. This experiemtn also reveals a test of the weak equivalence priniciple with eta (Al2O3, Pb) = (0.8 +/- 3.1) x 10(-10) for masses falling toward the Sun.