Estamos realizando la búsqueda. Por favor, espere...


Measurement of top quark pair production in association with a Z boson in proton-proton collisions at ?s = 13 TeV

Abstract: A measurement of the inclusive cross section of top quark pair production in association with a Z boson using proton-proton collisions at a center-of-mass energy of 13 TeV at the LHC is performed. The data sample corresponds to an integrated luminosity of 77.5 fb-1, collected by the CMS experiment during 2016 and 2017. The measurement is performed using final states containing three or four charged leptons (electrons or muons), and the Z boson is detected through its decay to an oppositely charged lepton pair. The production cross section is measured to be ?(t t ¯ Z) = 0.95 ± 0.05 (stat) ± 0.06 (syst) pb. For the first time, differential cross sections are measured as functions of the transverse momentum of the Z boson and the angular distribution of the negatively charged lepton from the Z boson decay. The most stringent direct limits to date on the anomalous couplings of the top quark to the Z boson are presented, including constraints on the Wilson coefficients in the framework of the standard model effective field theory.

Otras publicaciones de la misma revista o congreso con autores/as de la Universidad de Cantabria

 Fuente: Journal of High Energy Physics, Vol. 2020, Num. 03, Art. Num. 056

Editorial: Springer Verlag

 Fecha de publicación: 01/03/2020

Nº de páginas: 50

Tipo de publicación: Artículo de Revista

 DOI: 10.1007/JHEP03(2020)056

ISSN: 1126-6708,1029-8479

Url de la publicación: https://doi.org/10.1007/JHEP03(2020)056