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Title: Pinning down electroweak dipole operators of the top quark

Here, we consider hadronic top quark pair production and pair production in association with a photon or a Z boson to probe electroweak dipole couplings in tb¯W, tt¯γ, and tt¯Z interactions. We demonstrate how measurements of these processes at the 13 TeV LHC can be combined to disentangle and constrain anomalous dipole operators. The construction of cross section ratios allows us to significantly reduce various uncertainties and exploit orthogonal sensitivity between the tt¯γ and tt¯Z couplings. In addition, we show that angular correlations in tt¯ production can be used to constrain the remaining tb¯W dipole operator. Our approach yields excellent sensitivity to the anomalous couplings and can be a further step toward precise and direct measurements of the top quark electroweak interactions.
Authors:
 [1] ;  [2]
  1. European Organization for Nuclear Research (CERN), Geneva (Switzerland)
  2. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
Publication Date:
Grant/Contract Number:
SC0012567
Type:
Accepted Manuscript
Journal Name:
European Physical Journal. C, Particles and Fields
Additional Journal Information:
Journal Volume: 76; Journal Issue: 8; Journal ID: ISSN 1434-6044
Publisher:
Springer
Research Org:
Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
Sponsoring Org:
USDOE Office of Science (SC)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
OSTI Identifier:
1361700

Schulze, Markus, and Soreq, Yotam. Pinning down electroweak dipole operators of the top quark. United States: N. p., Web. doi:10.1140/epjc/s10052-016-4263-x.
Schulze, Markus, & Soreq, Yotam. Pinning down electroweak dipole operators of the top quark. United States. doi:10.1140/epjc/s10052-016-4263-x.
Schulze, Markus, and Soreq, Yotam. 2016. "Pinning down electroweak dipole operators of the top quark". United States. doi:10.1140/epjc/s10052-016-4263-x. https://www.osti.gov/servlets/purl/1361700.
@article{osti_1361700,
title = {Pinning down electroweak dipole operators of the top quark},
author = {Schulze, Markus and Soreq, Yotam},
abstractNote = {Here, we consider hadronic top quark pair production and pair production in association with a photon or a Z boson to probe electroweak dipole couplings in tb¯W, tt¯γ, and tt¯Z interactions. We demonstrate how measurements of these processes at the 13 TeV LHC can be combined to disentangle and constrain anomalous dipole operators. The construction of cross section ratios allows us to significantly reduce various uncertainties and exploit orthogonal sensitivity between the tt¯γ and tt¯Z couplings. In addition, we show that angular correlations in tt¯ production can be used to constrain the remaining tb¯W dipole operator. Our approach yields excellent sensitivity to the anomalous couplings and can be a further step toward precise and direct measurements of the top quark electroweak interactions.},
doi = {10.1140/epjc/s10052-016-4263-x},
journal = {European Physical Journal. C, Particles and Fields},
number = 8,
volume = 76,
place = {United States},
year = {2016},
month = {8}
}