Erratum to: Constraining couplings of top quarks to the Z boson in $$ t\overline{t} $$ + Z production at the LHC
Abstract
We study top quark pair production in association with a Z boson at the Large Hadron Collider (LHC) and investigate the prospects of measuring the couplings of top quarks to the Z boson. To date these couplings have not been constrained in direct measurements. Such a determination will be possible for the first time at the LHC. Our calculation improves previous coupling studies through the inclusion of next-to-leading order (NLO) QCD corrections in production and decays of all unstable particles. We treat top quarks in the narrow-width approximation and retain all NLO spin correlations. To determine the sensitivity of a coupling measurement we perform a binned log-likelihood ratio test based on normalization and shape information of the angle between the leptons from the Z boson decay. The obtained limits account for statistical uncertainties as well as leading theoretical systematics from residual scale dependence and parton distribution functions. We use current CMS data to place the first direct constraints on the ttbZ couplings. We also consider the upcoming high-energy LHC run and find that with 300 inverse fb of data at an energy of 13 TeV the vector and axial ttbZ couplings can be constrained at the 95% confidence level tomore »
- Authors:
-
- Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States); European Organization for Nuclear Research (CERN), Geneva (Switzerland)
- Publication Date:
- Research Org.:
- Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), High Energy Physics (HEP)
- OSTI Identifier:
- 1156504
- Report Number(s):
- FERMILAB-PUB-14-062-T; CERN-PH-TH-2014-053
Journal ID: ISSN 1029-8479; arXiv eprint number arXiv:1404.1005
- Grant/Contract Number:
- AC02-07CH11359
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Journal of High Energy Physics (Online)
- Additional Journal Information:
- Journal Name: Journal of High Energy Physics (Online); Journal Volume: 2015; Journal Issue: 9; Related Information: The doi for the original article is 10.1007/JHEP07(2014)091; Journal ID: ISSN 1029-8479
- Publisher:
- Springer Berlin
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
Citation Formats
Röntsch, Raoul, and Schulze, Markus. Erratum to: Constraining couplings of top quarks to the Z boson in $ t\overline{t} $ + Z production at the LHC. United States: N. p., 2015.
Web. doi:10.1007/JHEP09(2015)132.
Röntsch, Raoul, & Schulze, Markus. Erratum to: Constraining couplings of top quarks to the Z boson in $ t\overline{t} $ + Z production at the LHC. United States. https://doi.org/10.1007/JHEP09(2015)132
Röntsch, Raoul, and Schulze, Markus. Mon .
"Erratum to: Constraining couplings of top quarks to the Z boson in $ t\overline{t} $ + Z production at the LHC". United States. https://doi.org/10.1007/JHEP09(2015)132. https://www.osti.gov/servlets/purl/1156504.
@article{osti_1156504,
title = {Erratum to: Constraining couplings of top quarks to the Z boson in $ t\overline{t} $ + Z production at the LHC},
author = {Röntsch, Raoul and Schulze, Markus},
abstractNote = {We study top quark pair production in association with a Z boson at the Large Hadron Collider (LHC) and investigate the prospects of measuring the couplings of top quarks to the Z boson. To date these couplings have not been constrained in direct measurements. Such a determination will be possible for the first time at the LHC. Our calculation improves previous coupling studies through the inclusion of next-to-leading order (NLO) QCD corrections in production and decays of all unstable particles. We treat top quarks in the narrow-width approximation and retain all NLO spin correlations. To determine the sensitivity of a coupling measurement we perform a binned log-likelihood ratio test based on normalization and shape information of the angle between the leptons from the Z boson decay. The obtained limits account for statistical uncertainties as well as leading theoretical systematics from residual scale dependence and parton distribution functions. We use current CMS data to place the first direct constraints on the ttbZ couplings. We also consider the upcoming high-energy LHC run and find that with 300 inverse fb of data at an energy of 13 TeV the vector and axial ttbZ couplings can be constrained at the 95% confidence level to C_V=0.24^{+0.39}_{-0.85} and C_A=-0.60^{+0.14}_{-0.18}, where the central values are the Standard Model predictions. This is a reduction of uncertainties by 25% and 42%, respectively, compared to an analysis based on leading-order predictions. We also translate these results into limits on dimension-six operators contributing to the ttbZ interactions beyond the Standard Model.},
doi = {10.1007/JHEP09(2015)132},
journal = {Journal of High Energy Physics (Online)},
number = 9,
volume = 2015,
place = {United States},
year = {Mon Sep 21 00:00:00 EDT 2015},
month = {Mon Sep 21 00:00:00 EDT 2015}
}
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Works referenced in this record:
Constraining couplings of top quarks to the Z boson in t t ¯ $$ t\overline{t} $$ + Z production at the LHC
journal, July 2014
- Röntsch, Raoul; Schulze, Markus
- Journal of High Energy Physics, Vol. 2014, Issue 7
A minimal set of top anomalous couplings
journal, May 2009
- Aguilar-Saavedra, J. A.
- Nuclear Physics B, Vol. 812, Issue 1-2
Works referencing / citing this record:
Study of top quark dipole interactions in production associated with two heavy gauge bosons at the LHC
journal, April 2018
- Etesami, Seyed Mohsen; Khatibi, Sara; Mohammadi Najafabadi, Mojtaba
- Physical Review D, Vol. 97, Issue 7
Pinning down electroweak dipole operators of the top quark
journal, August 2016
- Schulze, Markus; Soreq, Yotam
- The European Physical Journal C, Vol. 76, Issue 8
Study of top quark dipole interactions in $t\bar{t}$ production associated with two heavy gauge bosons at the LHC
text, January 2017
- Etesami, Seyed Mohsen; Khatibi, Sara; Najafabadi, Mojtaba Mohammadi
- arXiv