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

Yasar Onel; CMS Collaboration; B. Bilki; W Clarida; Kamuran Dilsiz; S. Durgut; R. P. Gandrajula; M. Haytmyradov; V Khristenko; J-P Merlo; H Mermerkaya; Alexi Mestvirishvili; A. Moeller; Jane M Nachtman; Hasan Ogul; F. Ozok; Aldo Penzo; C. Snyder; E. Tiras; James W Wetzel; Kai Yi

doi:10.1007/JHEP08(2018)011

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

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

Yasar Onel, CMS Collaboration, B. Bilki, W Clarida, Kamuran Dilsiz, S. Durgut, R. P. Gandrajula, M. Haytmyradov, V Khristenko, J-P Merlo, …

Journal of high energy physics : JHEP, Vol.2018, 11

08/03/2018

DOI: 10.1007/JHEP08(2018)011

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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 13 TeV 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 σ(tt¯W)=0.77+0.12−0.11(stat)+0.13−0.12(syst)pb and σ(tt¯Z)=0.99+0.09−0.08(stat)+0.12−0.10(syst)pb. The expected (observed) signal significance for the tt¯W production in same-sign dilepton channel is found to be 4.5 (5.3) standard deviations, while for the tt¯Z production in three- and four-lepton channels both the expected and the observed significances 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 coefficients for eight dimension-six operators describing new interactions that would modify tt¯W and tt¯Z production.

Details

Title: Subtitle: Measurement of the cross section for top quark pair production in association with a W or Z boson in proton-proton collisions at s√=13 TeV
Creators: Yasar Onel - University of Iowa, Physics and Astronomy
CMS Collaboration (Institution)
B. Bilki - University of Iowa
W Clarida - University of Iowa
Kamuran Dilsiz - University of Iowa, Physics and Astronomy
S. Durgut - University of Iowa
R. P. Gandrajula - University of Iowa
M. Haytmyradov - University of Iowa
V Khristenko - University of Iowa
J-P Merlo - University of Iowa
H Mermerkaya - University of Iowa
Alexi Mestvirishvili - University of Iowa, Physics and Astronomy
A. Moeller - University of Iowa
Jane M Nachtman - University of Iowa, Physics and Astronomy
Hasan Ogul - University of Iowa, Physics and Astronomy
F. Ozok - University of Iowa
Aldo Penzo - University of Iowa, Physics and Astronomy
C. Snyder - University of Iowa
E. Tiras - University of Iowa
James W Wetzel - University of Iowa, Physics and Astronomy
Kai Yi - University of Iowa, Physics and Astronomy
Resource Type: Journal article
Publication Details: Journal of high energy physics : JHEP, Vol.2018, 11
DOI: 10.1007/JHEP08(2018)011
ISSN: 1126-6708
eISSN: 1029-8479
Publisher: Springer
Language: English
Date published: 08/03/2018
Academic Unit: Physics and Astronomy
Record Identifier: 9984439158702771

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