The Lambda(b) polarization in hadronic Z decays is measured in semileptonic decays from the average energies of the charged lepton and the neutrino. In a data sample of approximately 3 million hadronic Z decays collected by the ALEPH detector at LEP between 1991 and 1994, 462 +/- 31 Lambda(b) candidates are selected using (Lambda pi(+))-lepton correlations. From this event sample, the Lambda(b) polarization is measured to be P-Lambda b = -0.23(-0.20)(+0.24)(stat.)(-0.07)(+0.08)(syst.).

Measurement of the Lambda(b) polarization in Z decays / Buskulic, D., Casper, D., Debonis, I., Decamp, D., Ghez, P., Coy, C., Lees, J.p., Lucotte, A., Minard, M.n., Odier, P., Pietrzyk, B., Chmeissani, M., Crespo, J.m., Efthymiopoulos, I., Fernandez, E., Fernandezbosman, M., Garrido, L., Juste, A., Martinez, M., Orteu, S., et al.. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - STAMPA. - 365:1-4(1996), pp. 437-447. [10.1016/0370-2693(95)01433-0]

Measurement of the Lambda(b) polarization in Z decays

CREANZA, Donato Maria;IASELLI, Giuseppe;MAGGI, Giorgio Pietro;
1996

Abstract

The Lambda(b) polarization in hadronic Z decays is measured in semileptonic decays from the average energies of the charged lepton and the neutrino. In a data sample of approximately 3 million hadronic Z decays collected by the ALEPH detector at LEP between 1991 and 1994, 462 +/- 31 Lambda(b) candidates are selected using (Lambda pi(+))-lepton correlations. From this event sample, the Lambda(b) polarization is measured to be P-Lambda b = -0.23(-0.20)(+0.24)(stat.)(-0.07)(+0.08)(syst.).
1996
Measurement of the Lambda(b) polarization in Z decays / Buskulic, D., Casper, D., Debonis, I., Decamp, D., Ghez, P., Coy, C., Lees, J.p., Lucotte, A., Minard, M.n., Odier, P., Pietrzyk, B., Chmeissani, M., Crespo, J.m., Efthymiopoulos, I., Fernandez, E., Fernandezbosman, M., Garrido, L., Juste, A., Martinez, M., Orteu, S., et al.. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - STAMPA. - 365:1-4(1996), pp. 437-447. [10.1016/0370-2693(95)01433-0]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11589/1606
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