We report on the measurement of W-boson pair-production with the L3 detector at LEP at an average centre-of-mass energy of 172.13 GeV. In a data sample corresponding to a total luminosity of 10.25 pb(-1) we select 110 four-fermion events with pairs of hadronic jets or leptons with high invariant masses. Branching fractions of W decays into different fermion-antifermion pairs are determined with and without the assumption of charged-current lepton universality. The branching fraction for hadronic W decays is measured to be: B(W --> hadrons) = 64.2(-3.8)(+3.7) (stat.) +/- 0.5 (syst.) %. Combining all final states the total cross section for W-pair production is measured to be: sigma(ww) = 12.27(-1.32)(+1.41) (stat.) +/- 0.23 (syst.) pb. The results are in good agreement with the Standard Model. (C) 1997 Elsevier Science B.V.

Measurement of W-pair cross sections in e(+)e(-) interactions at root s=172 GeV and W-decay branching fractions / M., A., O., A., M., A., S., A., J., A., G., A., J., A., A., A., G., A., M. G., A., G., A., H., A., V. P., A., T., A., F., A., A., A., T., A., T., A., Bagnaia, P., L., B., et al.. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - 407:(1997), pp. 419-431. [10.1016/S0370-2693(97)00802-2]

Measurement of W-pair cross sections in e(+)e(-) interactions at root s=172 GeV and W-decay branching fractions

BAGNAIA, Paolo;FACCINI, Riccardo;FERRONI, Fernando;GENTILE, Simonetta;GIAGU, Stefano;ORGANTINI, Giovanni;
1997

Abstract

We report on the measurement of W-boson pair-production with the L3 detector at LEP at an average centre-of-mass energy of 172.13 GeV. In a data sample corresponding to a total luminosity of 10.25 pb(-1) we select 110 four-fermion events with pairs of hadronic jets or leptons with high invariant masses. Branching fractions of W decays into different fermion-antifermion pairs are determined with and without the assumption of charged-current lepton universality. The branching fraction for hadronic W decays is measured to be: B(W --> hadrons) = 64.2(-3.8)(+3.7) (stat.) +/- 0.5 (syst.) %. Combining all final states the total cross section for W-pair production is measured to be: sigma(ww) = 12.27(-1.32)(+1.41) (stat.) +/- 0.23 (syst.) pb. The results are in good agreement with the Standard Model. (C) 1997 Elsevier Science B.V.
1997
01 Pubblicazione su rivista::01a Articolo in rivista
Measurement of W-pair cross sections in e(+)e(-) interactions at root s=172 GeV and W-decay branching fractions / M., A., O., A., M., A., S., A., J., A., G., A., J., A., A., A., G., A., M. G., A., G., A., H., A., V. P., A., T., A., F., A., A., A., T., A., T., A., Bagnaia, P., L., B., et al.. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - 407:(1997), pp. 419-431. [10.1016/S0370-2693(97)00802-2]
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/11573/472610
 Attenzione

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

Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus ND
  • ???jsp.display-item.citation.isi??? 15
social impact