Electron Decay of the Pion

Abstract

PHYSICAL REVIEW LETTERS OCTOBER 1, 1958 thenG^ = 13.7; G v int =8.2; G^KA =2.3; G NKl: = 1.8(y 5 in K ints.), G 7rN = 13.7; G fflnt = 8.2; %KA = 2 -2 ; %jra = 1.8 (no y 5 in tf ints.). If the calculated results for the relative sign of G vN to G n int and G NKA to G NKS can be carried over to the ^--coupling constants, the heavy-fermion mass degeneracy must be broken by the ZK{ A, S) interactions. Possible Lagrangians are +ffi{^W[y 5 d + f 3 ^)/ 2 +U-?3 *)/2]*j -011 r^ #y 5 (l+f 3 ^)/ 2 "(I " fa ^)/2]*i} (y 5 in tf ints.).(3)The y 5 multiplies (l-f 3 y)/2 instead of (l+f 3 y)/ 2 for the case of "no y 5 in K ints." Another K interaction, L tf = gK^^o" iT U^i) 0(y B , 1) #±, 1

Lepton Numbers in the Framework of Neutrino Mixing

“…8 The experiment was proposed by B. Pontecorvo in 1959 [35]. 9 This prediction of the V-A theory was beautifully confirmed in a CERN experiment in 1958 [38].…”

The 600 MeV Synchrocyclotron: Laying the Foundations

“…One month later, first results, based on 124 photographs displaying some 40 events, were presented in Geneva at "The Second United Nations International Conference on the Peaceful Uses of Atomic Energy" [18]. The local newspaper "Tribune de Genève" ran the headline "Découverte au CERN", the first such event for the Organization.…”

The Discoveries of Rare Pion Decays at the CERN Synchrocyclotron

“…29 Work to set up the detector started in February, its construction was completed in May and the first run with beam took place on June 23.…”

“…The travelling-wave fast oscilloscope equipped with a photographic camera used in the SC experiment to record the target signals. 29 On the blackboard one can see hand-written notes from a discussion on the first results, including a preliminary lower limit on R, suggesting that this photograph was taken at the end of August 1958. of π + -mesons from hydrogen and carbon at 90…”

“…In the choice of the method used in the SC experiment 29 to distinguish π + → e + ν decays from the π + → µ + → e + decay chain, I was influenced by the single photomultiplier experiment of Janes and Kraushaar 32 performed in 1953 at the M.I.T. 300 MeV electron synchrotron to measure the photoproduction cross-section 5.…”