Electroweak Effects at High Energies by G. Goggi (auth.), Harvey B. Newman (eds.)

By G. Goggi (auth.), Harvey B. Newman (eds.)

The first Europhysics learn convention on Electroweak results at excessive Energies used to be held on the "Ettore Majorana" Centre for clinical tradition in Erice, Sicily from February 1 -12, 1983. The convention used to be attended via sixty one physicists from eleven international locations. The convention was once subsidized via the eu actual Society, the Italian Ministry of Public schooling, the Italian Ministry of Technological examine, the Sicilian nearby executive and the California Institute of expertise. convention structure The research convention a brand new in depth layout within which the kingdom of our wisdom of the electroweak interplay, and the relation of the electroweak area to Grand Unified and Superunified Theories used to be reviewed in a few intensity. through the week convention, fifty four experimental and theoretical talks have been provided, and 4 night dialogue periods have been held. The Erice atmosphere, the wide-ranging convention application, and the truth that the vast majority of the members have been without delay excited about contemporary significant experimental or theoretical advancements, ended in lively and extremely pleasant discussions. contributors had the infrequent chance to view many of the significant tendencies in excessive power physics in a brief period of time, and to debate and consider the tendencies within the uniquely peaceable but stimulating surroundings that's an Erice tradition.

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For comparison the distribution of the fractional leakage in the back calorimeter compartment is shown in Fig. 14. 1. as expected for hadrons. This is further confirmed by Fig. 13c, which shows the charge distributions of the clusters measured in the MTPes for the two classes of events separately. 02 are consistent with an electron behaviour. The transverse energy distribution of the 3 electron candidates is shown in Fig. 13d. L--'--'- -5 o 5 10 (1/p-lIEI/ 611/p-ll£l Figure 12. Matching quality criteria.

Such decays are expected qq to proceed mainly via pairs. 4 - SEARCH FOR W + eV DECAYS Large transverse momentum electrons are expected to originate + + from the decay W- + e-v. whith a PT spectrum having a Jacobian peak e at PT ~ MW/2. This structure is smeared by the W transverse momentum, which may be similar to that of a two-jet system of a same mass (see Fig. 9), but remains clearly detectable. This is because the smearing of the Jacobian peak does not induce significant correlations between the transverse momentum of the decay electron and that of the W (or of its associated recoil particles).

00- o .... 08 Figure 14. Leakage into the hadron veto compartment of the forward calorimeters. a) For events associated with a signal in the pre shower counter ; b) For events not associated with a signal in the preshower counter. The cut used in the analysis rejects events in the cross-hatched region ("v 2%). 23 conversions which are resolved by the magnetic field. The overall background contamination, estimated from an extrapolation in Fig. 2 events for ET > 15 GeV. 3 - Hissing transverse momentum A distinctive feature of the decay W + eV is given by the presence of an undetected neutrino having transverse momentum roughly balancing that of the electron.

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