A direct measurement of the total decay width of the W boson Gamma(W) is presented using 350 pb(-1) of data from p (p) over bar collisions at root s = 1.96 TeV collected with the CDF II detector at the Fermilab Tevatron. The width is determined by normalizing predicted signal and background distributions to 230185 W candidates decaying to e nu and mu nu in the transverse-mass region 50 < M(T) < 90 GeV and then fitting the predicted shape to 6055 events in the high-M(T) region, 90 < M(T) < 200 GeV. The result is Gamma(W) = (2032 +/- 45(stat) +/- 57(syst)) MeV, consistent with the standard model expectation.

T., A., J., A., T., A., M. G., A., B. A., G., S., A., et al. (2008). Direct measurement of the W boson width in p(p)over-bar collisions at root s=1.96 TeV. PHYSICAL REVIEW LETTERS, 100(7), 071801-1-071801-7 [10.1103/PhysRevLett.100.071801].

Direct measurement of the W boson width in p(p)over-bar collisions at root s=1.96 TeV

CIOCCI, MARIA AGNESE;
2008-01-01

Abstract

A direct measurement of the total decay width of the W boson Gamma(W) is presented using 350 pb(-1) of data from p (p) over bar collisions at root s = 1.96 TeV collected with the CDF II detector at the Fermilab Tevatron. The width is determined by normalizing predicted signal and background distributions to 230185 W candidates decaying to e nu and mu nu in the transverse-mass region 50 < M(T) < 90 GeV and then fitting the predicted shape to 6055 events in the high-M(T) region, 90 < M(T) < 200 GeV. The result is Gamma(W) = (2032 +/- 45(stat) +/- 57(syst)) MeV, consistent with the standard model expectation.
2008
T., A., J., A., T., A., M. G., A., B. A., G., S., A., et al. (2008). Direct measurement of the W boson width in p(p)over-bar collisions at root s=1.96 TeV. PHYSICAL REVIEW LETTERS, 100(7), 071801-1-071801-7 [10.1103/PhysRevLett.100.071801].
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/11365/37495
 Attenzione

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