270 research outputs found
Limits on the production of scalar leptoquarks from Z (0) decays at LEP
A search has been made for pairs and for single production of scalar leptoquarks of the first and second generations using a data sample of 392000 Z0 decays from the DELPHI detector at LEP 1. No signal was found and limits on the leptoquark mass, production cross section and branching ratio were set. A mass limit at 95% confidence level of 45.5 GeV/c2 was obtained for leptoquark pair production. The search for the production of a single leptoquark probed the mass region above this limit and its results exclude first and second generation leptoquarks D0 with masses below 65 GeV/c2 and 73 GeV/c2 respectively, at 95% confidence level, assuming that the D0lq Yukawa coupling alpha(lambda) is equal to the electromagnetic one. An upper limit is also given on the coupling alpha(lambda) as a function of the leptoquark mass m(D0)
Invariant mass dependence of particle correlations in hadronic final states from the decay of the Z
Absolute in situ energy calibration of luminosity calorimeters in the DELPHI experiment at LEP
Large area silicon detectors with front end electronics in VLSI as a luminosity monitor at LEP
Elastic scattering of charged mesons, antiprotons and protons on protons at incident momenta of 20, 30 and 50 GeV/c in the momentum transfer range
Proton-proton elastic scattering at 50 GeV/c incident momentum in the momentum transfer range
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