We set constraints on the trilinear Higgs boson self-coupling, λ3 , by combining the information coming from the W mass and leptonic effective Weinberg angle, electroweak precision observables, with the single Higgs boson analyses targeting the γ γ , Z Z ∗ , W W ∗ , τ + τ − and b̄b decay channels and the double Higgs boson analyses in the bb̄bb̄ , bb̄ τ + τ − and bb̄ γ γ decay channels, performed by the ATLAS collaboration. With the assumption that the new physics affects only the Higgs potential, values outside SM the interval − 1 . 8 λ3 SM < λ3 < 9 . 2 λ3 SM are excluded at 95% confidence level. With respect to similar analyses that do not include the information coming from the electroweak precision observables our analysis shows a stronger constraint on both positive and negative values of λ3 .

Degrassi, G., Di Micco, B., Giardino, P.P., Rossi, E. (2021). Higgs boson self-coupling constraints from single Higgs, double Higgs and electroweak measurements. PHYSICS LETTERS. SECTION B, 817, 136307 [10.1016/j.physletb.2021.136307].

Higgs boson self-coupling constraints from single Higgs, double Higgs and electroweak measurements

Degrassi, Giuseppe;Di Micco, Biagio;
2021-01-01

Abstract

We set constraints on the trilinear Higgs boson self-coupling, λ3 , by combining the information coming from the W mass and leptonic effective Weinberg angle, electroweak precision observables, with the single Higgs boson analyses targeting the γ γ , Z Z ∗ , W W ∗ , τ + τ − and b̄b decay channels and the double Higgs boson analyses in the bb̄bb̄ , bb̄ τ + τ − and bb̄ γ γ decay channels, performed by the ATLAS collaboration. With the assumption that the new physics affects only the Higgs potential, values outside SM the interval − 1 . 8 λ3 SM < λ3 < 9 . 2 λ3 SM are excluded at 95% confidence level. With respect to similar analyses that do not include the information coming from the electroweak precision observables our analysis shows a stronger constraint on both positive and negative values of λ3 .
Degrassi, G., Di Micco, B., Giardino, P.P., Rossi, E. (2021). Higgs boson self-coupling constraints from single Higgs, double Higgs and electroweak measurements. PHYSICS LETTERS. SECTION B, 817, 136307 [10.1016/j.physletb.2021.136307].
File in questo prodotto:
File Dimensione Formato  
1-s2.0-S0370269321002471-main.pdf

accesso aperto

Descrizione: Articolo
Tipologia: Versione Editoriale (PDF)
Licenza: Creative commons
Dimensione 353.25 kB
Formato Adobe PDF
353.25 kB 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/11590/404208
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus ND
  • ???jsp.display-item.citation.isi??? 6
social impact