Lambda(b) polarization in Z0 decays at LEP - INSPIRE

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Lambda(b) polarization in Z0 decays at LEP

DELPHI

Collaboration

Oct, 1999

22 pages

Published in:

Phys.Lett.B 474 (2000) 205-222

DOI:

10.1016/S0370-2693(99)01431-8

Report number:

CERN-EP-99-155

Experiments:

CERN-LEP-DELPHI

View in:

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Abstract: (Elsevier)

The longitudinal polarization of the Λ b baryon is measured at the LEP e + e − collider by DELPHI. It is determined from the charged lepton and neutrino energy spectra in 249±19 Λ b semileptonic decays reconstructed in ≈3.5 million hadronic Z 0 decays using Λ 0 -lepton correlations. The measured polarization is: P Λ b =−0.49 −0.30 +0.32 (stat.)±0.17(syst.)

electron positron: colliding beams
electron positron: annihilation
Z0: electroproduction
Z0: hadronic decay
bottom: pair production
Lambda/b0: polarization
Lambda/b0: semileptonic decay
correlation: (Lambda lepton)
DELPHI
experimental results

References(26)

Figures(0)

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