This article presents the results of two studies of Higgs boson properties using the WW∗(→eνμν)jj final state, based on a dataset corresponding to 36.1fb−1 of √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(α)=0.0±0.4(stat.)±0.3(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 aL=0.91+0.10−0.18(stat.)+0.09−0.17(syst.) and aT=1.2±0.4(stat.)+0.2−0.3(syst.). These coupling strengths are translated into pseudo-observables, resulting in κVV=0.91+0.10−0.18(stat.)+0.09−0.17(syst.) and ϵVV=0.13+0.28−0.20 (stat.)+0.08−0.10(syst.). All results are consistent with the Standard Model predictions.

Aad, G., Abbott, B., Abbott, D.C., Abud, A.A., Abeling, K., Abhayasinghe, D.K., et al. (2022). Constraints on Higgs boson properties using WW∗(→eνμν)jj production in 36.1fb−1 of √s=13 TeV pp collisions with the ATLAS detector. THE EUROPEAN PHYSICAL JOURNAL. C, PARTICLES AND FIELDS, 82(7), 1-33 [10.1140/epjc/s10052-022-10366-1].

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

Alberghi, GL;Alfonsi, F;Bellagamba, L;Bindi, M;Boscherini, D;Cabras, G;Caforio, D;Carratta, G;Clissa, L;DeCastro, S;Di Sipio, R;Fabbri, F;Fabbri, L;Franchini, M;Gabrielli, A;Giacobbe, B;Massa, L;Polini, A;Rinaldi, L;Romano, M;Sbarra, C;Sbrizzi, A;Semprini-Cesari, N;Sioli, M;Todome, K;Valentinetti, S;Villa, M;Vittori, C;Vivarelli, I;Zoccoli, A;
2022

Abstract

This article presents the results of two studies of Higgs boson properties using the WW∗(→eνμν)jj final state, based on a dataset corresponding to 36.1fb−1 of √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(α)=0.0±0.4(stat.)±0.3(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 aL=0.91+0.10−0.18(stat.)+0.09−0.17(syst.) and aT=1.2±0.4(stat.)+0.2−0.3(syst.). These coupling strengths are translated into pseudo-observables, resulting in κVV=0.91+0.10−0.18(stat.)+0.09−0.17(syst.) and ϵVV=0.13+0.28−0.20 (stat.)+0.08−0.10(syst.). All results are consistent with the Standard Model predictions.
2022
Aad, G., Abbott, B., Abbott, D.C., Abud, A.A., Abeling, K., Abhayasinghe, D.K., et al. (2022). Constraints on Higgs boson properties using WW∗(→eνμν)jj production in 36.1fb−1 of √s=13 TeV pp collisions with the ATLAS detector. THE EUROPEAN PHYSICAL JOURNAL. C, PARTICLES AND FIELDS, 82(7), 1-33 [10.1140/epjc/s10052-022-10366-1].
Aad, G; Abbott, B; Abbott, DC; Abud, AA; Abeling, K; Abhayasinghe, DK; Abidi, SH; AbouZeid, OS; Abraham, NL; Abramowicz, H; Abreu, H; Abulaiti, Y; Ach...espandi
File in questo prodotto:
File Dimensione Formato  
s10052-022-10366-1.pdf

accesso aperto

Tipo: Versione (PDF) editoriale
Licenza: Licenza per Accesso Aperto. Creative Commons Attribuzione (CCBY)
Dimensione 5.24 MB
Formato Adobe PDF
5.24 MB Adobe PDF Visualizza/Apri

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/898407
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 13
  • ???jsp.display-item.citation.isi??? 6
social impact