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Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - Measurement of the H → γ γ and H → Z Z ∗ → 4 ℓ cross-sections in pp collisions at s = 13.6 TeV with the ATLAS detector
AU - The ATLAS collaboration
AU - Barton, A.E.
AU - Bertram, I.A.
AU - Borissov, G.
AU - Bouhova-Thacker, E.V.
AU - Ferguson, R.A.M.
AU - Fox, H.
AU - Henderson, R.C.W.
AU - Jones, R.W.L.
AU - Kartvelishvili, V.
AU - Love, P.A.
AU - Marshall, E.J.
AU - Meng, L.
AU - Muenstermann, D.
AU - Ribaric, N.
AU - Rybacki, K.
AU - Smizanska, M.
AU - Spinali, S.
AU - Wharton, A.M.
PY - 2024/1/24
Y1 - 2024/1/24
N2 - The inclusive Higgs boson production cross-section is measured in the di-photon and the ZZ∗→4ℓ decay channels using 31.4 and 29.0 fb-1 of pp collision data respectively, collected with the ATLAS detector at a centre-of-mass energy of s=13.6 TeV. To reduce the model dependence, the measurement in each channel is restricted to a particle-level phase space that closely matches the channel’s detector-level kinematic selection, and it is corrected for detector effects. These measured fiducial cross-sections are σfid, γγ= 76-13+14 fb, and σfid, 4ℓ= 2.80±0.74 fb, in agreement with the corresponding Standard Model predictions of 67.6±3.7 fb and 3.67±0.19 fb. Assuming Standard Model acceptances and branching fractions for the two channels, the fiducial measurements are extrapolated to the full phase space yielding total cross-sections of σ(pp→H)=67-11+12 pb and 46±12 pb at 13.6 TeV from the di-photon and ZZ∗→4ℓ measurements respectively. The two measurements are combined into a total cross-section measurement of σ(pp→H)=58.2±8.7 pb, to be compared with the Standard Model prediction of σ(pp→H)SM=59.9±2.6 pb.
AB - The inclusive Higgs boson production cross-section is measured in the di-photon and the ZZ∗→4ℓ decay channels using 31.4 and 29.0 fb-1 of pp collision data respectively, collected with the ATLAS detector at a centre-of-mass energy of s=13.6 TeV. To reduce the model dependence, the measurement in each channel is restricted to a particle-level phase space that closely matches the channel’s detector-level kinematic selection, and it is corrected for detector effects. These measured fiducial cross-sections are σfid, γγ= 76-13+14 fb, and σfid, 4ℓ= 2.80±0.74 fb, in agreement with the corresponding Standard Model predictions of 67.6±3.7 fb and 3.67±0.19 fb. Assuming Standard Model acceptances and branching fractions for the two channels, the fiducial measurements are extrapolated to the full phase space yielding total cross-sections of σ(pp→H)=67-11+12 pb and 46±12 pb at 13.6 TeV from the di-photon and ZZ∗→4ℓ measurements respectively. The two measurements are combined into a total cross-section measurement of σ(pp→H)=58.2±8.7 pb, to be compared with the Standard Model prediction of σ(pp→H)SM=59.9±2.6 pb.
U2 - 10.1140/epjc/s10052-023-12130-5
DO - 10.1140/epjc/s10052-023-12130-5
M3 - Journal article
VL - 84
JO - European Physical Journal C: Particles and Fields
JF - European Physical Journal C: Particles and Fields
SN - 1434-6044
IS - 1
M1 - 78
ER -