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Constraints on Higgs boson properties using W W ∗(→ eνμν) j j production in 36.1 fb−1 of √s = 13 TeV pp collisions with the ATLAS detector

Contributors

ATLAS Collaboration

Collaborators

Adorni Braccesi Chiassi, Sofia; Akilli, Ece; Amrouche, Cherifa Sabrina; Antel, Claire; Clark, Allan Geoffrey; Della Volpe, Domenico; Dubreuil, Arnaud; Ferrere, Didier; Golling, Tobias; Gonzalez Sevilla, Sergio; Iacobucci, Giuseppe; Iizawa, Tomoya; Jansky, Roland; Lionti, Anthony Eric; Mermod, Philippe; Nindhito, Herjuno Rah; Pandini, Carlo; Paolozzi, Lorenzo; Poggi, Riccardo; Raine, Johnny; Salamani, Dalila; Schramm, Steven; Sfyrla, Anna; Sultan, D M S; Wu, Xin; Zaffaroni, Ettore

Published in

European physical journal. C, Particles and fields, vol. 82, no. 7

Publication date

2022

First online date

2022-07-18

Abstract

This article presents the results of two studies of Higgs boson properties using the $WW^*(\rightarrow e\nu \mu \nu )jj$ final state, based on a dataset corresponding to ${36.1}{{\mathrm{fb}}^{-1}}$ of $\sqrt{s}=13$ TeV proton–proton collisions recorded by the ATLAS experiment at the Large Hadron Collider. The first study targets Higgs boson production via gluon–gluon fusion and constrains the CP properties of the effective Higgs–gluon interaction. Using angular distributions and the overall rate, a value of $\tan (\alpha ) = 0.0 \pm 0.4 (\mathrm {stat.}) \pm 0.3 (\mathrm {syst.})$ is obtained for the tangent of the mixing angle for CP-even and CP-odd contributions. The second study exploits the vector-boson fusion production mechanism to probe the Higgs boson couplings to longitudinally and transversely polarised W and Z bosons in both the production and the decay of the Higgs boson; these couplings have not been directly constrained previously. The polarisation-dependent coupling-strength scale factors are defined as the ratios of the measured polarisation-dependent coupling strengths to those predicted by the Standard Model, and are determined using rate and kinematic information to be $a_\mathrm {L}=0.91^{+0.10}_{-0.18}$(stat.)$^{+0.09}_{-0.17}$(syst.) and $a_{\mathrm {T}}=1.2 \pm 0.4 $(stat.)$ ^{+0.2}_{-0.3} $(syst.). These coupling strengths are translated into pseudo-observables, resulting in $\kappa _{VV}= 0.91^{+0.10}_{-0.18}$(stat.)$^{+0.09}_{-0.17}$(syst.) and $\epsilon _{VV} =0.13^{+0.28}_{-0.20}$ (stat.)$^{+0.08}_{-0.10}$(syst.). All results are consistent with the Standard Model predictions.

Keywords

  • P p: scattering
  • P p: colliding beams
  • Higgs particle: coupling
  • Higgs particle: decay modes
  • W: pair production
  • W: leptonic decay
  • Jet: pair production
  • Vector boson: fusion
  • Higgs particle: hadroproduction
  • Gluon gluon: fusion
  • Coupling constant
  • ATLAS
  • Decay: angular distribution
  • W: polarization
  • Z0: polarization
  • Polarization: transverse
  • Polarization: longitudinal
  • CERN LHC Coll
  • Kinematics
  • Mixing angle: measured
  • Experimental results
  • 13000 GeV-cms
  • S126CP
  • S126SWW

UNIGE affiliation entities

Citation (ISO format)

ATLAS Collaboration. Constraints on Higgs boson properties using W W ∗(→ eνμν) j j production in 36.1 fb−1 of √s = 13 TeV pp collisions with the ATLAS detector. In: European physical journal. C, Particles and fields, 2022, vol. 82, n° 7. doi: 10.1140/epjc/s10052-022-10366-1

Main files (1)

Article (Published version)
CC BY

Identifiers

Additional URL for this publication

https://link.springer.com/10.1140/epjc/s10052-022-10366-1

Journal ISSN

1434-6044
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65downloads

Technical informations

Creation

05/03/2026 14:42:59

First validation

05/03/2026 14:48:46

Update

10/04/2026 07:29:40

Status update

10/04/2026 07:29:40

Last indexation

10/11/2026 18:20:24
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