Improved variables for measuring the Λb polarization

C. Diaconu, M. Talby, J. G. Körner, D. Pirjol

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We discuss a few possible strategies for measuring the polarization of the Λb baryons produced in e+e- annihilation at the Z resonance through their inclusive semileptonic decays. After reviewing the existing methods, an extension is proposed, based on the ratio of the averages of the squared electron and neutrino energies, including both perturbative and nonperturbative corrections. This variable minimizes the statistical error on the Λb polarization, while keeping the systematic theoretical errors at the level of 1-2%. A number of other polarization-sensitive variables are also discussed, such as averages of ratios of the electron and neutrino energies and the distribution in the difference between the electron and neutrino rapidities.

Original languageEnglish
Pages (from-to)6186-6194
Number of pages9
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Issue number11
StatePublished - 1996

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Physics and Astronomy (miscellaneous)

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