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 sigma fid,gamma gamma= 76-13+14 fb, and sigma fid,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 sigma (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 sigma (pp -> H)=58.2 +/- 8.7 pb, to be compared with the Standard Model prediction of sigma (pp -> H)SM=59.9 +/- 2.6 pb.

Measurement of the H→γγ and H→ZZ→4l cross-sections in pp collisions at s=13.6 TeV with the ATLAS detector [Measurement of the $$H \rightarrow \gamma \gamma $$ and $$H \rightarrow ZZ^* \rightarrow 4 \ell $$ cross-sections in pp collisions at $$\sqrt{s}=13.6$$ TeV with the ATLAS detector] / G. Aad, B.A.. - In: EUROPEAN PHYSICAL JOURNAL. C, PARTICLES AND FIELDS. - ISSN 1434-6052. - 84:1(2024 Jan 24), pp. 78.1-78.34. [10.1140/epjc/s10052-023-12130-5]

Measurement of the H→γγ and H→ZZ→4l cross-sections in pp collisions at s=13.6 TeV with the ATLAS detector [Measurement of the $$H \rightarrow \gamma \gamma $$ and $$H \rightarrow ZZ^* \rightarrow 4 \ell $$ cross-sections in pp collisions at $$\sqrt{s}=13.6$$ TeV with the ATLAS detector]

A. Andreazza;A. Carbone;L. Carminati;S. D’Auria;L. Dell’Asta;M. Fanti;M. Lazzaroni;E. Mazzeo;C. Meroni;A. Murrone;L. Perini;F. Piazza;F. Ragusa;A. Stabile;
2024

Abstract

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 sigma fid,gamma gamma= 76-13+14 fb, and sigma fid,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 sigma (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 sigma (pp -> H)=58.2 +/- 8.7 pb, to be compared with the Standard Model prediction of sigma (pp -> H)SM=59.9 +/- 2.6 pb.
Settore FIS/01 - Fisica Sperimentale
Settore ING-INF/07 - Misure Elettriche e Elettroniche
24-gen-2024
https://link.springer.com/article/10.1140/epjc/s10052-023-12130-5
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2434/1046688
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