The weak neutral current

Five Phases of Weak Neutral Current Experiments from the Perspective of a Theorist

I give my personal perspective on the past, present, and future of weak neutral current experiments, emphasizing the experimental inputs; the theoretical difficulties and inputs; the role of model independent and global analyses; and the implications at each stage. • Introductory Comments • The Discovery Phase (unification) • The Second Generation (the standard model confirmed) • The Third Gene...

WEAK NEUTRAL CURRENTS IN e + -

The differential cross section of e+e--) F+F(F+=p+, p, 1;‘, etc.) is calculated for arbitrarily polarized incident and outgoing beams by exchanging one photon and one neutral Z-meson coupled to neutral weak currents. The interference effects manifest themselves in significant parity violating asymmetries for longitudinal polarizations which are about 4(4.5)0/o at q=28 GeV, 9(12.5)% at q=40 GeV ...

Wear Neutral - Current Interactions

The First Gauge Theory of Weak Interactions and the Prediction of Weak Neutral Currents

The three theoretical and historical components of the Standard Model are the exact chiral gauge theory of weak interactions, electroweak unification, and the Higgs mechanism for spontaneous symmetry breaking. I put into historical perspective my 1958 invention of the first gauge theory of weak interactions, predicting weak neutral currents, and show how the fundamental differences between glob...

How the first neutral-current experiments ended

At the beginning of the 1970s there seemed little reason to believe that strangeness-conserving neutral currents existed: theoreticians had no pressing need for them and several experiments suggested that they were suppressed if they were present at all. Indeed the two remarkable neutrino experiments that eventually led to their discovery were designed and built for very different purposes, inc...