A search for Higgs boson pair production in the b bbar gamma gamma final state is performed. The proton–proton collision dataset corresponds to an integrated luminosity of 308 fb-1, consisting of two samples, 140 fb-1 at a centre-of-mass energy of root s = 13TeV and 168 fb-1 at root s = 13.6TeV, recorded between 2015 and 2024 by the ATLAS detector at the CERN Large Hadron Collider. In addition to a larger dataset, this analysis improves upon the previous search in the same final state through several methodological and technical developments. The Higgs boson pair production cross section divided by the Standard Model prediction is found to be muHH=0.9−1.1+1.4 (muHH=1−1.0+1.3 expected), which translates into a 95% confidence-level upper limit of muHH < 3.7. At the same confidence level the Higgs self-coupling modifier is constrained to be in the range −1.6 < kappa_lambda < 6.6 (−1.8 < kappa_lambda < 6.9 expected).

Aad, G., Aakvaag, E., Abbott, B., Abdelhameed, S., Abeling, K., Abicht, N.j., et al. (2026). Study of Higgs boson pair production in the HH -> b bbar gamma gamma final state with 308 fb-1 of data collected at root s = 13 TeV and 13.6 TeV by the ATLAS experiment. PHYSICS LETTERS. SECTION B, 876 [10.1016/j.physletb.2026.140280].

Study of Higgs boson pair production in the HH -> b bbar gamma gamma final state with 308 fb-1 of data collected at root s = 13 TeV and 13.6 TeV by the ATLAS experiment

Aielli, G.;Camarri, P.;Cerrito, L.;De Sanctis, U.;Di Ciaccio, A.;
2026-01-01

Abstract

A search for Higgs boson pair production in the b bbar gamma gamma final state is performed. The proton–proton collision dataset corresponds to an integrated luminosity of 308 fb-1, consisting of two samples, 140 fb-1 at a centre-of-mass energy of root s = 13TeV and 168 fb-1 at root s = 13.6TeV, recorded between 2015 and 2024 by the ATLAS detector at the CERN Large Hadron Collider. In addition to a larger dataset, this analysis improves upon the previous search in the same final state through several methodological and technical developments. The Higgs boson pair production cross section divided by the Standard Model prediction is found to be muHH=0.9−1.1+1.4 (muHH=1−1.0+1.3 expected), which translates into a 95% confidence-level upper limit of muHH < 3.7. At the same confidence level the Higgs self-coupling modifier is constrained to be in the range −1.6 < kappa_lambda < 6.6 (−1.8 < kappa_lambda < 6.9 expected).
2026
Pubblicato
Rilevanza internazionale
Articolo
Esperti anonimi
Settore PHYS-01/A - Fisica sperimentale delle interazioni fondamentali e applicazioni
English
Con Impact Factor ISI
ATLAS
B-jets
Di-Higgs
Photons
Run 3
Self-interaction
Aad, G., Aakvaag, E., Abbott, B., Abdelhameed, S., Abeling, K., Abicht, N.j., et al. (2026). Study of Higgs boson pair production in the HH -> b bbar gamma gamma final state with 308 fb-1 of data collected at root s = 13 TeV and 13.6 TeV by the ATLAS experiment. PHYSICS LETTERS. SECTION B, 876 [10.1016/j.physletb.2026.140280].
Aad, G; Aakvaag, E; Abbott, B; Abdelhameed, S; Abeling, K; Abicht, Nj; Abidi, Sh; Aboelela, M; Aboulhorma, A; Abramowicz, H; Abulaiti, Y; Acharya, Bs;...espandi
Articolo su rivista
File in questo prodotto:
File Dimensione Formato  
plb.876.140280.pdf

solo utenti autorizzati

Tipologia: Versione Editoriale (PDF)
Licenza: Creative commons
Dimensione 9.4 MB
Formato Adobe PDF
9.4 MB Adobe PDF   Visualizza/Apri   Richiedi una copia

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/2108/462585
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 0
  • ???jsp.display-item.citation.isi??? ND
social impact