Using data collected with the ALEPH detector at LEP correlations between the decay products of the tau(+) and tau- produced in the decay of the Z have been measured. The measurements performed in the decays tau --> pi nu and tau --> p nu place limits on deviations from the Standard Model. These are given by the parameter xi with xi = -1 for the Standard Model. The measured values are xi(pi) = -0.95 +/- 0.11 +/- 0.05 and xi(p) = -1.03 +/- 0.11 +/- 0.05. For models which predict xi(pi) = xi(p) = xi - interpreted as the average tau neutrino helicity - the measurement is xi = -0.99 +/- 0.07 +/- 0.04.

CORRELATION-MEASUREMENTS IN Z-]TAU(+)TAU(-) AND THE TAU-NEUTRINO HELICITY

ROLANDI, LUIGI;
1994

Abstract

Using data collected with the ALEPH detector at LEP correlations between the decay products of the tau(+) and tau- produced in the decay of the Z have been measured. The measurements performed in the decays tau --> pi nu and tau --> p nu place limits on deviations from the Standard Model. These are given by the parameter xi with xi = -1 for the Standard Model. The measured values are xi(pi) = -0.95 +/- 0.11 +/- 0.05 and xi(p) = -1.03 +/- 0.11 +/- 0.05. For models which predict xi(pi) = xi(p) = xi - interpreted as the average tau neutrino helicity - the measurement is xi = -0.99 +/- 0.07 +/- 0.04.
File in questo prodotto:
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11384/20664
 Attenzione

Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo

Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 30
  • ???jsp.display-item.citation.isi??? 25
social impact