scholarly journals Evidence for single top-quark production in the s-channel in proton–proton collisions at s=8 TeV with the ATLAS detector using the Matrix Element Method

2016 ◽  
Vol 756 ◽  
pp. 228-246 ◽  
Author(s):  
G. Aad ◽  
B. Abbott ◽  
J. Abdallah ◽  
O. Abdinov ◽  
R. Aben ◽  
...  
Keyword(s):  
Top Quark ◽  
Proton Proton ◽  
Proton Collisions ◽  
Matrix Element Method ◽  
Single Top ◽  
Top Quark Production ◽  
The Matrix ◽  
Quark Production ◽  
8 Tev ◽  
Proton Proton Collisions

scholarly journals Search for s-channel single top-quark production in proton–proton collisions at s=8 TeV with the ATLAS detector

2015 ◽  
Vol 740 ◽  
pp. 118-136 ◽  
Author(s):  
G. Aad ◽  
B. Abbott ◽  
J. Abdallah ◽  
S. Abdel Khalek ◽  
O. Abdinov ◽  
...  
Keyword(s):  
Top Quark ◽  
Atlas Detector ◽  
Proton Proton ◽  
Proton Collisions ◽  
Single Top ◽  
Top Quark Production ◽  
Quark Production ◽  
8 Tev ◽  
Proton Proton Collisions

scholarly journals Search for new physics in top quark production in dilepton final states in proton-proton collisions at $$\sqrt{s} = 13\,\text {TeV} $$

2019 ◽  
Vol 79 (11) ◽  
Author(s):  
A. M. Sirunyan ◽  
◽  
A. Tumasyan ◽  
W. Adam ◽  
F. Ambrogi ◽  
...  
Keyword(s):  
Top Quark ◽  
New Physics ◽  
Effective Field ◽  
Final State ◽  
Data Set ◽  
Proton Proton ◽  
Proton Collisions ◽  
Top Quark Production ◽  
Quark Production ◽  
Proton Proton Collisions

Abstract A search for new physics in top quark production is performed in proton-proton collisions at $$13\,\text {TeV} $$13TeV. The data set corresponds to an integrated luminosity of $$35.9{\,\text {fb}^{-1}} $$35.9fb-1 collected in 2016 with the CMS detector. Events with two opposite-sign isolated leptons (electrons or muons), and $$\mathrm{b}$$b quark jets in the final state are selected. The search is sensitive to new physics in top quark pair production and in single top quark production in association with a $$\mathrm{W}$$W boson. No significant deviation from the standard model expectation is observed. Results are interpreted in the framework of effective field theory and constraints on the relevant effective couplings are set, one at a time, using a dedicated multivariate analysis. This analysis differs from previous searches for new physics in the top quark sector by explicitly separating $$\mathrm{t}\mathrm{W}$$tW from $$\mathrm{t}{\bar{\mathrm{t}}}$$tt¯ events and exploiting the specific sensitivity of the $$\mathrm{t}\mathrm{W}$$tW process to new physics.

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