ATOMKI Közlemények 16., melléklet a 2. számhoz (1974)

Melléklet - G. Marx: Neutral weak currents at low energies Symposium in Debrecen 29-30 March 1974

ATOMKI Közlemények Suppl. 16/2 (1974) 1-2. NEUTRAL WEAK CURRENTS AT LOW ENERGIES SYMPOSIUM IN DEBRECEN 29-30 MARCH 197A The interest of particle physicists focused on the weak interactions in the last years. There was a certain theoretical indication, that weak reactions (together with the electromagne­tic coupling) might become the dominating interaction of matter at superhigh energies, just beyond the reach of our present accelerators, and the "strong but soft" forces would dissolve in that region. The theoretical investigation of these possibilities led to the re-discovery of gauge field theories, which might offer a contradiction-free unified formulation of the fundamental interactions. From experimental point of view the most interesting consequence of some unified gauge models was the prediction of neutral weak currents. The conventional form of weak reactions produces a charge transfer between the conserved consistents of matter (e.g. in the case of К capture one has e-+p+-vv0+n° , i.e. a charge transfer from the baryon onto the lepton). In order to arrive at a renormalizable interaction, one needs a weak interac­tion of similar structure, but without charge transfer, e.g. v° +p+-*v° +p+. The experimental discovery of such reaction at CERN in 1973, and its confirmation at NAL and at ANL in 1974 increased the interest in this field. One of the consequences of the neutral current coupling has been a new weak force between different leptons , between different baryons and also between leptons and baryons. This weak force may induce parity impurities not only in nuclei, but also in atomic and molecular systems. Taking these amazing possibilities into account, the Extended Triangle Collaboration (high energy research institutions in Bratislava, Budapest, Trieste, Vienna, Zagreb) concentrated their March seminar onto the low energy aspects of weak interactions. A special flavour was given to this seminar by the presence of our collègues from the field of nucelar physics , chemistry and biophysics. (They really have collected longer experiences in investigating the reflection asymmetries of composite structures.) The low energy aspect of this meeting explained the circumstance, that the host of this seminar was the Nuclear Research Institute (ATOMKI) of the Hungarian Academy of Sciences. The organizers of

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