scholarly journals Measurement of dijet cross-sections in pp collisions at 7 TeV centre-of-mass energy using the ATLAS detector

2014 ◽  
Vol 2014 (5) ◽  
Author(s):  
G. Aad ◽  
◽  
T. Abajyan ◽  
B. Abbott ◽  
J. Abdallah ◽  
...  
Keyword(s):  
Cross Sections ◽  
Atlas Detector ◽  
Centre Of Mass ◽  
Mass Energy ◽  
Pp Collisions

scholarly journals Measurement of cross sections and couplings of the Higgs Boson in bosonic decay channels with the ATLAS detector

2018 ◽  
Vol 182 ◽  
pp. 02013
Author(s):  
Nikita Belyaev
Keyword(s):  
Higgs Boson ◽  
Cross Sections ◽  
Hadron Collider ◽  
Atlas Detector ◽  
Atlas Collaboration ◽  
Standard Model Higgs Boson ◽  
Centre Of Mass ◽  
Mass Energy ◽  
Decay Channels ◽  
The Standard Model

After the discovery of the Higgs boson, the measurement of its properties are of particular importance. In this paper, measurement of the cross sections and couplings of the Higgs boson in bosonic decay channels with the ATLAS detector are presented. Previous measurements of the spin and parity of this new particle, as well as the investigation of its couplings to other SM particles, revealed no significant deviations from the corresponding predictions for the Standard Model Higgs boson. In the years 2015-2017, the centre-of-mass energy √s and the integrated luminosity of the Large Hadron Collider was increased up to 13 TeV and 36.1 fb-1, respectively. With this improvements of the LHC, the properties of recently discovered Higgs boson can be studied in more details. In this paper, latest updates on cross sections and couplings analyses of the Higgs Boson are presented. The discussion will focus on the recent results obtained by the ATLAS collaboration in γγ and 4l Higgs boson decay channels as well as their combination.

scholarly journals Observation of ZZ production via Vector Boson Scattering in ATLAS

2021 ◽  
Vol 2105 (1) ◽  
pp. 012013
Author(s):  
Ioannis Maznas
Keyword(s):  
Cross Sections ◽  
Vector Boson ◽  
Statistical Significance ◽  
Signal Strength ◽  
Atlas Detector ◽  
Pp Collisions ◽  
Final State ◽  
Measurement Results ◽  
Vector Boson Scattering

Abstract This document presents measurement results of the ZZ production via Vector Boson Scattering interactions in 139fb −1 of data recorded by the ATLAS detector from pp collisions at s = 13 TeV during LHC Run-II (2015-2018). In this study, 127 candidate events with a fully leptonic final state (ℓℓℓℓjj) have been observed and another 82 events for ℓℓvvjj final state, with a contribution of the purely electroweak ZZjj process estimated to be 20.6 ± 2.5 and 12.3 ± 0.7 events respectively. The measured cross sections were found to be 1.27 ± 0.14fb (1.22 ± 0.35fb) for ℓℓℓℓjj (ℓℓvvjj) in their respective fiducial regions. Using multivariant methods, the EW production of ZZjj events (combining the ℓℓℓℓjj and ℓℓvvjj channels) was measured to have a signal strength of 1.35± 0.34, which leads to a rejection of the no-electroweak hypothesis with a statistical significance of 5.5σ.

scholarly journals Hunting New Physics with ATLAS

2018 ◽  
Vol 182 ◽  
pp. 02089
Author(s):  
Vasiliki A. Mitsou ◽  
Keyword(s):  
Extra Dimension ◽  
New Physics ◽  
Atlas Detector ◽  
Centre Of Mass ◽  
Mass Energy ◽  
Gauge Bosons

Highlights from recent new physics searches with the ATLAS detector at the CERN LHC are presented in this paper. They include searches for extra-dimension models, compositeness, new gauge bosons, supersymmetry, among others. Results are based on analyses of pp collision data recorded at a centre-of-mass energy of 13 TeV.

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