scholarly journals Physics opportunities for vector-boson scattering at a future 100 TeV hadron collider

2017 ◽  
Vol 96 (7) ◽  
Author(s):  
B. Jäger ◽  
L. Salfelder ◽  
M. Worek ◽  
D. Zeppenfeld
Keyword(s):  
Vector Boson ◽  
Hadron Collider ◽  
Vector Boson Scattering

scholarly journals Extract the energy scale of anomalous γγ → W+W− scattering in the vector boson scattering process using artificial neural networks

2021 ◽  
Vol 2021 (9) ◽  
Author(s):  
Ji-Chong Yang ◽  
Jin-Hua Chen ◽  
Yu-Chen Guo
Keyword(s):  
Neural Networks ◽  
Artificial Neural Networks ◽  
Vector Boson ◽  
Hadron Collider ◽  
New Physics ◽  
Suppressive Effect ◽  
Effective Field ◽  
Energy Scale ◽  
Artificial Neural ◽  
Vector Boson Scattering

Abstract As a model independent approach to search for the signals of new physics (NP) beyond the Standard Model (SM), the SM effective field theory (SMEFT) draws a lot of attention recently. The energy scale of a process is an important parameter in the study of an EFT such as the SMEFT. However, for the processes at a hadron collider with neutrinos in the final states, the energy scales are difficult to reconstruct. In this paper, we study the energy scale of anomalous γγ → W+W− scattering in the vector boson scattering (VBS) process pp → jjℓ+ℓ−ν$$ \overline{\nu} $$ ν ¯ at the large hadron collider (LHC) using artificial neural networks (ANNs). We find that the ANN is a powerful tool to reconstruct the energy scale of γγ → W+W− scattering. The factors affecting the effects of ANNs are also studied. In addition, we make an attempt to interpret the ANN and arrive at an approximate formula which has only five fitting parameters and works much better than the approximation derived from kinematic analysis. With the help of ANN approach, the unitarity bound is applied as a cut on the energy scale of γγ → W+W− scattering, which is found to has a significant suppressive effect on signal events. The sensitivity of the process pp → jjℓ+ℓ−ν$$ \overline{\nu} $$ ν ¯ to anomalous γγWW couplings and the expected constraints on the coefficients at current and possible future LHC are also studied.

scholarly journals Vector-Boson scattering at the LHC: Unraveling the electroweak sector

2021 ◽  
pp. 2130009
Author(s):  
Roberto Covarelli ◽  
Mathieu Pellen ◽  
Marco Zaro
Keyword(s):  
Vector Boson ◽  
Hadron Collider ◽  
New Physics ◽  
Theoretical Description ◽  
Point Of View ◽  
Experimental Point ◽  
Gauge Sector ◽  
Signal Sensitivity ◽  
Electroweak Sector ◽  
Vector Boson Scattering

Vector-boson scattering (VBS) processes probe the innermost structure of electroweak (EW) interactions in the Standard Model (SM), and provide a unique sensitivity for new physics phenomena affecting the gauge sector. In this review, we report on the salient aspects of this class of processes, both from the theory and experimental point of view. We start by discussing recent achievements relevant for their theoretical description, some of which have set important milestones in improving the precision and accuracy of the corresponding simulations. We continue by covering the development of experimental techniques aimed at detecting these rare processes and improving the signal sensitivity over large backgrounds. We then summarize the details of the most relevant VBS signatures and review the related measurements available to date, along with their comparison with SM predictions. We conclude by discussing the perspective at the upcoming Large Hadron Collider runs and at future hadron facilities.

scholarly journals Standard model EFT effects in vector-boson scattering at the LHC

2021 ◽  
Vol 104 (1) ◽  
Author(s):  
A. Dedes ◽  
P. Kozów ◽  
M. Szleper
Keyword(s):  
Standard Model ◽  
Vector Boson ◽  
Vector Boson Scattering

scholarly journals Higgs resonance in vector boson scattering

1998 ◽  
Vol 58 (5) ◽  
Author(s):  
Wolfgang Kilian ◽  
Kurt Riesselmann
Keyword(s):  
Vector Boson ◽  
Vector Boson Scattering

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.

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