A measurement is performed of the cross section of top quark pair production in association with a W or Z boson using proton-proton collisions at a center-of-mass energy of 13TeV at the LHC. The data sample corresponds to an integrated luminosity of 35.9 fb(-1), collected by the CMS experiment in 2016. The measurement is performed in the same-sign dilepton, three-and four-lepton final states. The production cross sections are measured to be sigma(t (t) over barW) = 0.77(-0.11)(+0.12)(stat)(-0.12)(+0.13) pb and sigma(t (t) over barZ) = 0.99(-0.08)(+0.09) (stat)(-0.10)(+0.12) (syst) pb. The expected (observed) signal signi fi cance for the sigma(t (t) over barW production in same-sign dilepton channel is found to be 4.5 (5.3) standard deviations, while for the t (t) over barZ production in three- and four-lepton channels both the expected and the observed signi fi cances are found to be in excess of 5 standard deviations. The results are in agreement with the standard model predictions and are used to constrain the Wilson coe ffi cients for eight dimension-six operators describing new interactions that would modify t (t) over barW and t (t) over barZ production.

Measurement of the cross section for top quark pair production in association with a W or Z boson in proton-proton collisions at root s=13 TeV / Sirunyan, A.M., Tumasyan, A., Adam, W., Ambrogi, F., Asilar, E., Bergauer, T., Brandstetter, J., Brondolin, E., Dragicevic, M., Eroe, J., Del Valle, A.E., Flechl, M., Friedl, M., Fruehwirth, R., Ghete, V.M., Grossmann, J., Hrubec, J., Jeitler, M., Koenig, A., Krammer, N., et al.. - In: JOURNAL OF HIGH ENERGY PHYSICS. - ISSN 1029-8479. - STAMPA. - 8(2018). [10.1007/JHEP08(2018)011]

Measurement of the cross section for top quark pair production in association with a W or Z boson in proton-proton collisions at root s=13 TeV

Creanza, D.;De Filippis, N.;Iaselli, G.;Maggi, G.;Pugliese, G.;
2018

Abstract

A measurement is performed of the cross section of top quark pair production in association with a W or Z boson using proton-proton collisions at a center-of-mass energy of 13TeV at the LHC. The data sample corresponds to an integrated luminosity of 35.9 fb(-1), collected by the CMS experiment in 2016. The measurement is performed in the same-sign dilepton, three-and four-lepton final states. The production cross sections are measured to be sigma(t (t) over barW) = 0.77(-0.11)(+0.12)(stat)(-0.12)(+0.13) pb and sigma(t (t) over barZ) = 0.99(-0.08)(+0.09) (stat)(-0.10)(+0.12) (syst) pb. The expected (observed) signal signi fi cance for the sigma(t (t) over barW production in same-sign dilepton channel is found to be 4.5 (5.3) standard deviations, while for the t (t) over barZ production in three- and four-lepton channels both the expected and the observed signi fi cances are found to be in excess of 5 standard deviations. The results are in agreement with the standard model predictions and are used to constrain the Wilson coe ffi cients for eight dimension-six operators describing new interactions that would modify t (t) over barW and t (t) over barZ production.
2018
Measurement of the cross section for top quark pair production in association with a W or Z boson in proton-proton collisions at root s=13 TeV / Sirunyan, A.M., Tumasyan, A., Adam, W., Ambrogi, F., Asilar, E., Bergauer, T., Brandstetter, J., Brondolin, E., Dragicevic, M., Eroe, J., Del Valle, A.E., Flechl, M., Friedl, M., Fruehwirth, R., Ghete, V.M., Grossmann, J., Hrubec, J., Jeitler, M., Koenig, A., Krammer, N., et al.. - In: JOURNAL OF HIGH ENERGY PHYSICS. - ISSN 1029-8479. - STAMPA. - 8(2018). [10.1007/JHEP08(2018)011]
File in questo prodotto:
File Dimensione Formato  
Sirunyan2018_Article_MeasurementOfTheCrossSectionFo.pdf

accesso aperto

Tipologia: Versione editoriale
Licenza: Creative commons
Dimensione 1.55 MB
Formato Adobe PDF
1.55 MB Adobe PDF Visualizza/Apri

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/11589/138606
Citazioni
  • Scopus 92
  • ???jsp.display-item.citation.isi??? 99
social impact