TY - JOUR
T1 - Improved variables for measuring the Λb polarization
AU - Diaconu, C.
AU - Talby, M.
AU - Körner, J. G.
AU - Pirjol, D.
PY - 1996
Y1 - 1996
N2 - 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.
AB - 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.
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U2 - 10.1103/PhysRevD.53.6186
DO - 10.1103/PhysRevD.53.6186
M3 - Article
AN - SCOPUS:0008137476
SN - 1550-7998
VL - 53
SP - 6186
EP - 6194
JO - Physical Review D - Particles, Fields, Gravitation and Cosmology
JF - Physical Review D - Particles, Fields, Gravitation and Cosmology
IS - 11
ER -