1,125 research outputs found
Search for displaced vertices of oppositely charged leptons from decays of long-lived particles in <i>pp</i> collisions at <i>√s</i> = 13 TeV with the ATLAS detector
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Measurement of W Polarisation at LEP
Get PDFThe three different helicity states of W bosons produced in the reaction e+
e- -> W+ W- -> l nu q q~ at LEP are studied using leptonic and hadronic W
decays. Data at centre-of-mass energies \sqrt s = 183-209 GeV are used to
measure the polarisation of W bosons, and its dependence on the W boson
production angle. The fraction of longitudinally polarised W bosons is measured
to be 0.218 \pm 0.027 \pm 0.016 where the first uncertainty is statistical and
the second systematic, in agreement with the Standard Model expectation
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