The first observation of the production of a W boson with a single charm quark (c) jet in p (p) over bar collisions at root s = 1.96 TeV is reported. The analysis uses data corresponding to 4.3 fb(-1), recorded with the CDF II detector at the Fermilab Tevatron. Charm quark candidates are selected through the identification of an electron or muon from charm-hadron semileptonic decay within a hadronic jet, and a Wc signal is observed with a significance of 5.7 standard deviations. The production cross section sigma(Wc) (p(Tc) > 20 GeV/c, vertical bar eta(c)vertical bar < 1.5) x B(W -> l nu) is measured to be 13.6(-3.1)(+3.4) pb and is in agreement with theoretical expectations. From this result the magnitude of the quark-mixing matrix element V-cs is derived, vertical bar V-cs vertical bar = 1.08 +/- 0.16 along with a lower limit of vertical bar V-cs vertical bar > 0.71 at the 95% confidence level, assuming that the Wc production through c to s quark coupling is dominant. DOI: 10.1103/PhysRevLett.110.071801

Observation of the Production of a W Boson in Association with a Single Charm Quark

INTROZZI, GIANLUCA;
2013-01-01

Abstract

The first observation of the production of a W boson with a single charm quark (c) jet in p (p) over bar collisions at root s = 1.96 TeV is reported. The analysis uses data corresponding to 4.3 fb(-1), recorded with the CDF II detector at the Fermilab Tevatron. Charm quark candidates are selected through the identification of an electron or muon from charm-hadron semileptonic decay within a hadronic jet, and a Wc signal is observed with a significance of 5.7 standard deviations. The production cross section sigma(Wc) (p(Tc) > 20 GeV/c, vertical bar eta(c)vertical bar < 1.5) x B(W -> l nu) is measured to be 13.6(-3.1)(+3.4) pb and is in agreement with theoretical expectations. From this result the magnitude of the quark-mixing matrix element V-cs is derived, vertical bar V-cs vertical bar = 1.08 +/- 0.16 along with a lower limit of vertical bar V-cs vertical bar > 0.71 at the 95% confidence level, assuming that the Wc production through c to s quark coupling is dominant. DOI: 10.1103/PhysRevLett.110.071801
2013
The Physics category includes resources of a broad, general nature that contain materials from all areas of physics, The category also includes resources specifically concerned with the following physics sub-fields: mathematical physics, particle and nuclear physics, physics of fluids and plasmas, quantum physics, and theoretical physics.
Nessuno
Inglese
Internazionale
STAMPA
110
071801
406
info:eu-repo/semantics/article
262
T., Aaltonen; S., Amerio; D., Amidei; A., Anastassov; A., Annovi; J., Antos; G., Apollinari; J. A., Appel; T., Arisawa; A., Artikov; J., Asaadi; W., A...espandi
1 Contributo su Rivista::1.1 Articolo in rivista
none
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/11571/851073
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 31
  • ???jsp.display-item.citation.isi??? 22
social impact