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. Acciarri, O. Adriani, M. AguilarBenitez, S. Ahlen, J. Alcaraz, G. Alemanni, J. Allaby, A. Aloisio, G. Alverson, M. G. Alviggi, G. Ambrosi, H. Anderhub, V. P. Andreev, T. Angelescu, F. Anselmo, A. Arefiev, T. Azemoon, T. Aziz, P. Bagnaia, L. Baksay, et al.. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - STAMPA. - 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

ADRIANI, OSCAR;D'ALESSANDRO, RAFFAELLO;
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
407
419
431
M. Acciarri;O. Adriani;M. AguilarBenitez;S. Ahlen;J. Alcaraz;G. Alemanni;J. Allaby;A. Aloisio;G. Alverson;M. G. Alviggi;G. Ambrosi;H. Ande...espandi
File in questo prodotto:
Non ci sono file associati a questo prodotto.

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

Utilizza questo identificatore per citare o creare un link a questa risorsa: https://hdl.handle.net/2158/772879
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 20
  • ???jsp.display-item.citation.isi??? 15
social impact