Chance to use W-decay lepton channels for width determination
Abstract
The prosess of W(+)W(-)-production at e(+)e(-)-collisions as well as the process of single W-boson production in (gamma)e-collision with subsequent W decay via lepton channel were considered. Due to resonance nature of W-boson propagator in an intermediate state, lepton yield has a sharp rise in the region of W-boson production threshold. Lepton-inclusive cross sections were calculated. In the case of two-lepton production their energy fractions and the angle between their momenta in c.m.s. for the majority of events are found to be connected by the condition confining a certain body in 3 dimensional space of these parameters. For the case of single W production the decay lepton energy fraction and its angle with respect to a beam axis play a role of such parameters; their allowed regions being a plane figure. It is shown that measurement of 'smearing' of lepton distribution due to W-boson resonance nature would give quite reliable information on the ratio of the W-boson total width to its mass. Influence of radiation corrections on this distributions is analyzed.
- Publication:
-
Unknown
- Pub Date:
- 1992
- Bibcode:
- 1992cuwd.rept.....I
- Keywords:
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- Leptons;
- Pair Production;
- Radioactive Decay;
- Bosons;
- Neutrinos;
- Photon-Electron Interaction;
- Resonance;
- Atomic and Molecular Physics