Notes from the SLAC Theory Workshop on the Psi
J. Bjorken · OSTI OAI (U.S. Department of Energy Office of Scientific and Technical Information) · 2019
Weldon VI.Tests for the Charge Conjugation of the $ S. Brodsky VII.On the Effects of Nonconservation of Parity for a Resonance +-+in the Channel e e -/.i p J. D. Jackson VIII.P and C Symmetries in Hadronic Final States J. Kiihn --1 IX.Is $ (ic, ' ) = * (Ic, ) ?B. Ward _ X. Detailed J, Effects in e+e--e+e-and zp-R.Budny +--t-XI.Calculations of e e -e e and I.c+~-with Beam and Radiative Corrections R. Giles -6-111.Spin and ParityThis section is divided into three parts.In the first two sections the cases J = 0 and J > 1 are considered briefly.In the third section the case J = 1 is considered in detail.A. Spin 0:(i) -If (&I.!$ -background) is not isotropic, then JIc, # 0. (ii) If $L(e+e-J+ # 0 because the initial cannot interfere with the -P'P-) shows an interference dip (e. g.Fig. l), then +ee state for the background amplitude has Jz= + 1 and J = 0 resonant amplitude.(For Jr0 > 1 there can be interference in the angular distribution.) Write the vertex as z(g, + igp y5)u.Then I -7-B.Spin > 1 (G.Ringland, D. Wright) If the @ couplings to leptons preserves chirality then e*,f4 t -YY If C and P are conserved, then A(s) = B(s).The distributions are plotted for J = 2, 3, 9, 10.They are self explanatory.(Figs. 2 -3).The most general analysis for spin J is too cumbersome to be informative.C. Spin 1: (Budny, Cvitanovic, Giles, Pearson. . . ) If there exists no CP violation and no anomalous moment couplings, the zj +contribution to the e e -71 amplitude can be written: where gV and gA are real.This gives differential cross sections e+e---> ete'