Werner Heisenberg calculated that the force exerted by particles thought to drive this interaction went as the negative fifth power of radius, and differed from experimental values by a factor of one million. (-5[1])That “tentative” theory of this interaction, which predicts a cross section proportional to the square of energy in a four-fermion contact mechanism, (15[1])was posited by (15[1])Enrico Fermi. (15[3])Measurements (-5[1])of gamma (15[1])ray anisotropy served as a control in an experiment testing a prediction (15[1])about this interaction (-5[2])made by Lee and Yang. (15[3]-5[1])Cooled (15[3])(*) cobalt-60 (10[2])atoms (10[5])in a polarizing (10[6]-5[2])magnetic (10[2])field (10[1])were found to emit electrons (10[1])asymmetrically in an experiment (10[1])testing this force conducted (10[1])by Chien-Shiung (10[2])Wu. (10[4])This (10[1])parity-violating (-5[2])force is mediated by W and Z (10[3])bosons. (10[7]-5[2])For 10 points, name this fundamental force responsible for beta decay. (10[2])■END■ (10[10]0[1])