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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 / T., A., S., A., D., A., A., A., A., A., J., A., G., A., J. A., A., T., A., A., A., J., A., W., A., B., A., A., A., F., A., W., B., T., B., A., B.G., V. E., B., B. A., B., et al.. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 110:7(2013), p. 071801. [10.1103/physrevlett.110.071801]

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

BAUCE, MATTEO;GIAGU, Stefano;IORI, Maurizio;MARGAROLI, Fabrizio;
2013

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
01 Pubblicazione su rivista::01a Articolo in rivista
Observation of the Production of a W Boson in Association with a Single Charm Quark / T., A., S., A., D., A., A., A., A., A., J., A., G., A., J. A., A., T., A., A., A., J., A., W., A., B., A., A., A., F., A., W., B., T., B., A., B.G., V. E., B., B. A., B., et al.. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 110:7(2013), p. 071801. [10.1103/physrevlett.110.071801]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/555883
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