ηDecay, Current Algebra, and theC-Nonconserving Electromagnetic Current

Neutral Decay Modes of theηMeson

“…This value is in fair agreement with the results of Crawford, Lloyd, and Fowler 4 and Foster et al 5 when corrected for the existence of the mode 77 -* 77° + y + y, and can be accounted for by a ratio of 0.27 for the /= 3 to /= 1 amplitudes using a linear matrix-element model. 6 We wish to thank the staff at the Pennsylvania-Princeton Accelerator for their support in this experiment, and Dr. P. Yamin for his assistance in taking the data.…”

CURRENT ALGEBRA AND Η→ 3π

“…Some [ 5], either implicitly or explicitly, abandon electromagnetism as the main origin of the 77 decay. One proposes [6] a radical change from the usual notion of electromagnetic current. We will not examine these theories here , apart from some passing remarks.…”

Test of Current Algebra and ElectromagneticCNoninvariance in the Reactionsγ+p→π+N*(Barshay1 1967Phys. Rev. Lett.0000View full textAdd to dashboardCite

“…The postulated new commutation relations are shown to be consistent with certain other experimental and valid theoretical results. 1 The purpose of this note is to point out what appears to be an experimentally feasible and fairly direct test of the new current commutation relations and hence of the existence of K. within the framework of the validity of hypotheses (a) and (b) above.…”

“…4 * 5 This forbiddenness exists not only in second order in the usual CP-invariant electromagnetic current, but also in fourth order. 1 The current-algebra success in correlating K 2° -+ir + + 77""+77° and the experimental similarity of the three-pion decays of K 2° and 77 led Adler 1 to the possibility of circumventing this "accident" by investigating the consequences of an addition to the usual electromagnetic current, J^, of a piece K^ which violates C strong (and Strong) invariance. 6 With suitably postulated equaltime commutation relations for K,, with the a £ 2 = 5.6, X = 3, M=w = l. b £ 2 = 5.2, X = 0.7, \x=m = l.…”