Search for the Higgs boson produced in association with a vector boson and decaying into two spin-zero particles in the H → aa → 4b channel in pp collisions at 
                      s
                    =
                    13
                $$ \sqrt{s}=13 $$
               TeV with the ATLAS detector

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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Test of CP invariance in vector-boson fusion production of the Higgs boson in the H → ττ channel in proton–proton collisions at s=13TeV with the ATLAS detector

Physics Letters B ◽

10.1016/j.physletb.2020.135426 ◽

2020 ◽

Vol 805 ◽

pp. 135426

Author(s):

G. Aad ◽

B. Abbott ◽

D.C. Abbott ◽

A. Abed Abud ◽

K. Abeling ◽

...

Keyword(s):

Higgs Boson ◽

Vector Boson ◽

Atlas Detector ◽

Vector Boson Fusion ◽

Proton Proton ◽

Proton Collisions ◽

Proton Proton Collisions ◽

Cp Invariance

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Search for the Higgs boson produced in association with a vector boson and decaying into two spin-zero particles in the H → aa → 4b channel in pp collisions at s = 13 $$ \sqrt{s}=13 $$ TeV with the ATLAS detector

Measurement of the associated production of a Higgs boson decaying into b-quarks with a vector boson at high transverse momentum in pp collisions at s=13 TeV with the ATLAS detector

Search for the Standard Model Higgs boson produced by vector-boson fusion and decaying to bottom quarks in s = 8 $$ \sqrt{s}=8 $$ TeV pp collisions with the ATLAS detector

Search for invisible decays of the Higgs boson produced in association with a hadronically decaying vector boson in pp collisions at $$\sqrt{s} = 8$$ s = 8 TeV with the ATLAS detector

Search for invisible decays of a Higgs boson using vector-boson fusion in pp collisions at s = 8 $$ \sqrt{s}=8 $$ TeV with the ATLAS detector

Measurement of the production cross section for a Higgs boson in association with a vector boson in the H → WW⁎ → ℓνℓν channel in pp collisions at s=13 TeV with the ATLAS detector

Search for Higgs boson decays into two new low-mass spin-0 particles in the 4b channel with the ATLAS detector using pp collisions at s=13 TeV

Search for resonances decaying into a weak vector boson and a Higgs boson in the fully hadronic final state produced in proton−proton collisions at s=13 TeV with the ATLAS detector

Search for dark matter produced in association with a hadronically decaying vector boson in pp collisions at s=13 TeV with the ATLAS detector

Observation of ZZ production via Vector Boson Scattering in ATLAS

Test of CP invariance in vector-boson fusion production of the Higgs boson in the H → ττ channel in proton–proton collisions at s=13TeV with the ATLAS detector

Measurement of the production cross section for a Higgs boson in association with a vector boson in the H → WW⁎ → ℓνℓν channel in pp collisions at s=13 TeV with the ATLAS detector

Test of CP invariance in vector-boson fusion production of the Higgs boson in the H → ττ channel in proton–proton collisions at s=13TeV with the ATLAS detector