The three different helicity states of W bosons produced in the reaction e(+)e(-) --> W(+)W(-) --> lvqq' at LEP are studied using leptonic and hadronic W decays. Data at centre-of-mass energies roots = 183-209 GeV are used to measure the polarisation of W bosons, and its dependence on the W boson production angle. The fraction of longitudinally polarised W bosons is measured to be 0.218 +/- 0.027 +/- 0.016 where the first uncertainty is statistical and the second systematic, in agreement with the Standard Model expectation. (C) 2003 Published by Elsevier Science B.V.

Measurement of W polarisation at LEP / P., A., O., A., M., A.B., J., A., G., A., J., A., A., A., M. G., A., H., A., V., A., F., A., A., A., T., A., T., A., Bagnaia, P., A., B., G., B., L., B., S. V., B., S., B., et al.. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - 557:3-4(2003), pp. 147-156. [10.1016/s0370-2693(03)00172-2]

Measurement of W polarisation at LEP

BAGNAIA, Paolo;GENTILE, Simonetta;GIAGU, Stefano;LUCI, Claudio;ORGANTINI, Giovanni;PARAMATTI, Riccardo;
2003

Abstract

The three different helicity states of W bosons produced in the reaction e(+)e(-) --> W(+)W(-) --> lvqq' at LEP are studied using leptonic and hadronic W decays. Data at centre-of-mass energies roots = 183-209 GeV are used to measure the polarisation of W bosons, and its dependence on the W boson production angle. The fraction of longitudinally polarised W bosons is measured to be 0.218 +/- 0.027 +/- 0.016 where the first uncertainty is statistical and the second systematic, in agreement with the Standard Model expectation. (C) 2003 Published by Elsevier Science B.V.
2003
01 Pubblicazione su rivista::01a Articolo in rivista
Measurement of W polarisation at LEP / P., A., O., A., M., A.B., J., A., G., A., J., A., A., A., M. G., A., H., A., V., A., F., A., A., A., T., A., T., A., Bagnaia, P., A., B., G., B., L., B., S. V., B., S., B., et al.. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - 557:3-4(2003), pp. 147-156. [10.1016/s0370-2693(03)00172-2]
File allegati a 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/11573/248086
 Attenzione

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

Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 24
  • ???jsp.display-item.citation.isi??? 22
social impact