Searches are performed for nonresonant and resonant di-Higgs boson production in the b̅bγγ final state. The dataset used corresponds to an integrated luminosity of 139  fb−1 of proton–proton collisions at a center-of-mass energy of 13 TeV recorded by the ATLAS detector at the CERN Large Hadron Collider. No excess above the expected background is found and upper limits on the di-Higgs boson production cross sections are set. A 95% confidence-level upper limit of 4.2 times the cross section predicted by the Standard Model is set on pp →HH nonresonant production, where the expected limit is 5.7 times the Standard Model predicted value. The expected constraints are obtained for a background hypothesis excluding pp →HH production. The observed (expected) constraints on the Higgs boson trilinear coupling modifier k λ are determined to be [−1.5,6.7] ([−2.4,7.7]) at 95% confidence level, where the expected constraints on k λ are obtained excluding pp →HH production from the background hypothesis. For resonant production of a new hypothetical scalar particle X(X→HH→ b̅bγγ), limits on the cross section for pp→X→HH are presented in the narrow-width approximation as a function of mX in the range 251  GeV≤mX≤1000  GeV. The observed (expected) limits on the cross section for pp→X→HH range from 640 fb to 44 fb (391 fb to 46 fb) over the considered mass range.

Aad, G., Abbott, B., Abbott, D. ., Abed Abud, A., Abeling, K., Abhayasinghe, D. ., et al. (2022). Search for Higgs boson pair production in the two bottom quarks plus two photons final state in pp collisions at root s=13  TeV with the ATLAS detector. PHYSICAL REVIEW D, 106(5) [10.1103/PhysRevD.106.052001].

Search for Higgs boson pair production in the two bottom quarks plus two photons final state in pp collisions at root s=13  TeV with the ATLAS detector

Aielli, G.;Camarri, P.;Cerrito, L.;De Sanctis, U.;Di Ciaccio, A.;Giuli, F.;
2022-01-01

Abstract

Searches are performed for nonresonant and resonant di-Higgs boson production in the b̅bγγ final state. The dataset used corresponds to an integrated luminosity of 139  fb−1 of proton–proton collisions at a center-of-mass energy of 13 TeV recorded by the ATLAS detector at the CERN Large Hadron Collider. No excess above the expected background is found and upper limits on the di-Higgs boson production cross sections are set. A 95% confidence-level upper limit of 4.2 times the cross section predicted by the Standard Model is set on pp →HH nonresonant production, where the expected limit is 5.7 times the Standard Model predicted value. The expected constraints are obtained for a background hypothesis excluding pp →HH production. The observed (expected) constraints on the Higgs boson trilinear coupling modifier k λ are determined to be [−1.5,6.7] ([−2.4,7.7]) at 95% confidence level, where the expected constraints on k λ are obtained excluding pp →HH production from the background hypothesis. For resonant production of a new hypothetical scalar particle X(X→HH→ b̅bγγ), limits on the cross section for pp→X→HH are presented in the narrow-width approximation as a function of mX in the range 251  GeV≤mX≤1000  GeV. The observed (expected) limits on the cross section for pp→X→HH range from 640 fb to 44 fb (391 fb to 46 fb) over the considered mass range.
2022
Pubblicato
Rilevanza internazionale
Articolo
Esperti anonimi
Settore FIS/01 - FISICA SPERIMENTALE
Settore PHYS-01/A - Fisica sperimentale delle interazioni fondamentali e applicazioni
English
Con Impact Factor ISI
Aad, G., Abbott, B., Abbott, D. ., Abed Abud, A., Abeling, K., Abhayasinghe, D. ., et al. (2022). Search for Higgs boson pair production in the two bottom quarks plus two photons final state in pp collisions at root s=13  TeV with the ATLAS detector. PHYSICAL REVIEW D, 106(5) [10.1103/PhysRevD.106.052001].
Aad, G; Abbott, B; Abbott, D ; Abed Abud, A; Abeling, K; Abhayasinghe, D ; Abidi, S ; Abramowicz, H; Abreu, H; Abulaiti, Y; Abusleme Hoffman, A ; Acha...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2108/305699
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