The mass of the W boson is obtained from reconstructed invariant mass distributions in W-pair events. The sample of W pairs is selected from 10.65 pb(-1) collected with the ALEPH detector at a mean centre-of-mass energy of 172.09 GeV. The invariant mass distribution of simulated events are fitted to the experimental; distributions and the following W masses are obtained: WW --> <q(q)over bar><q(q)over bar>, m(W) = 81.30 +/- 0.47(stat.) +/- 0.11(syst.)GeV/c(2), WW --> l nu<q(q)over bar> (l=e,mu), m(W) = 80.54 +/- 0.47(stat.) +/- 0.11(syst.)GeV/c(2), WW --> tau nu<q(q)over tilde>, m(W) = 79.56 +/- 1.08(stat.) +/- 0.23(syst.) GeV/c(2). The statistical errors are the expected errors for Monte Carlo samples of the same integrated luminosity as the data. The combination of these three measurements gives: m(W) = 80.80 +/- 0.32(stat.) +/- 0.11(syst.) +/- 0.03(LEP energy) GeV/c(2)

Measurement of the W mass by direct reconstruction in e(+)e(-) collisions at 172 GeV / Barate, R., Buskulic, D., Decamp, D., Ghez, P., Goy, C., Jezequel, S., Lees, J.p., Lucotte, A., Minard, M.n., Nief, J.y., Pietrzyk, B., Boix, G., Casado, M.p., Chmeissani, M., Crespo, J.m., Delfino, M., Fernandez, E., Fernandez Bosman, M., Garrido, L., Grauges, E., et al.. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - STAMPA. - 422:1-4(1998), pp. 384-398. [10.1016/S0370-2693(98)00062-8]

Measurement of the W mass by direct reconstruction in e(+)e(-) collisions at 172 GeV

CREANZA, Donato Maria;IASELLI, Giuseppe;MAGGI, Giorgio Pietro;
1998

Abstract

The mass of the W boson is obtained from reconstructed invariant mass distributions in W-pair events. The sample of W pairs is selected from 10.65 pb(-1) collected with the ALEPH detector at a mean centre-of-mass energy of 172.09 GeV. The invariant mass distribution of simulated events are fitted to the experimental; distributions and the following W masses are obtained: WW --> , m(W) = 81.30 +/- 0.47(stat.) +/- 0.11(syst.)GeV/c(2), WW --> l nu (l=e,mu), m(W) = 80.54 +/- 0.47(stat.) +/- 0.11(syst.)GeV/c(2), WW --> tau nu, m(W) = 79.56 +/- 1.08(stat.) +/- 0.23(syst.) GeV/c(2). The statistical errors are the expected errors for Monte Carlo samples of the same integrated luminosity as the data. The combination of these three measurements gives: m(W) = 80.80 +/- 0.32(stat.) +/- 0.11(syst.) +/- 0.03(LEP energy) GeV/c(2)
1998
Measurement of the W mass by direct reconstruction in e(+)e(-) collisions at 172 GeV / Barate, R., Buskulic, D., Decamp, D., Ghez, P., Goy, C., Jezequel, S., Lees, J.p., Lucotte, A., Minard, M.n., Nief, J.y., Pietrzyk, B., Boix, G., Casado, M.p., Chmeissani, M., Crespo, J.m., Delfino, M., Fernandez, E., Fernandez Bosman, M., Garrido, L., Grauges, E., et al.. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - STAMPA. - 422:1-4(1998), pp. 384-398. [10.1016/S0370-2693(98)00062-8]
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/11589/2835
Citazioni
  • Scopus 21
  • ???jsp.display-item.citation.isi??? 23
social impact