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.). RI ANTONELLI, ANTONELLA/C-6238-2011; Passalacqua, Luca/F-5127-2011; Murtas, Fabrizio/B-5729-2012; St.Denis, Richard/C-8997-2012; Sanchez, Federico/F-5809-2012; Ferrante, Isidoro/F-1017-2012

Measurement of the Lambda(b) polarization in Z decays

ROLANDI, LUIGI;LIGABUE, FRANCO;LUSIANI, Alberto;
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.). RI ANTONELLI, ANTONELLA/C-6238-2011; Passalacqua, Luca/F-5127-2011; Murtas, Fabrizio/B-5729-2012; St.Denis, Richard/C-8997-2012; Sanchez, Federico/F-5809-2012; Ferrante, Isidoro/F-1017-2012
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11384/7536
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