학술논문
Measurement of the H→γγH→ZZ∗→4ℓs=13.6 and H→γγH→ZZ∗→4ℓs=13.6 cross-sections in pp collisions at H→γγH→ZZ∗→4ℓs=13.6 TeV with the ATLAS detector
Document Type
Original Paper
Author
Source
The European Physical Journal C: Particles and Fields. 84(1)
Subject
Language
English
ISSN
1434-6052
Abstract
The inclusive Higgs boson production cross-section is measured in the di-photon and the ZZ∗→4ℓ-1s=13.6TeVσfid,γγ=76-13+14σfid,4ℓ=2.80±0.7467.6±3.73.67±0.19σ(pp→H)=67-11+1246±12TeVZZ∗→4ℓσ(pp→H)=58.2±8.7σ(pp→H)SM=59.9±2.6 decay channels using 31.4 and 29.0 fbZZ∗→4ℓ-1s=13.6TeVσfid,γγ=76-13+14σfid,4ℓ=2.80±0.7467.6±3.73.67±0.19σ(pp→H)=67-11+1246±12TeVZZ∗→4ℓσ(pp→H)=58.2±8.7σ(pp→H)SM=59.9±2.6 of pp collision data respectively, collected with the ATLAS detector at a centre-of-mass energy of ZZ∗→4ℓ-1s=13.6TeVσfid,γγ=76-13+14σfid,4ℓ=2.80±0.7467.6±3.73.67±0.19σ(pp→H)=67-11+1246±12TeVZZ∗→4ℓσ(pp→H)=58.2±8.7σ(pp→H)SM=59.9±2.6 ZZ∗→4ℓ-1s=13.6TeVσfid,γγ=76-13+14σfid,4ℓ=2.80±0.7467.6±3.73.67±0.19σ(pp→H)=67-11+1246±12TeVZZ∗→4ℓσ(pp→H)=58.2±8.7σ(pp→H)SM=59.9±2.6. 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 ZZ∗→4ℓ-1s=13.6TeVσfid,γγ=76-13+14σfid,4ℓ=2.80±0.7467.6±3.73.67±0.19σ(pp→H)=67-11+1246±12TeVZZ∗→4ℓσ(pp→H)=58.2±8.7σ(pp→H)SM=59.9±2.6 ZZ∗→4ℓ-1s=13.6TeVσfid,γγ=76-13+14σfid,4ℓ=2.80±0.7467.6±3.73.67±0.19σ(pp→H)=67-11+1246±12TeVZZ∗→4ℓσ(pp→H)=58.2±8.7σ(pp→H)SM=59.9±2.6 fb, and ZZ∗→4ℓ-1s=13.6TeVσfid,γγ=76-13+14σfid,4ℓ=2.80±0.7467.6±3.73.67±0.19σ(pp→H)=67-11+1246±12TeVZZ∗→4ℓσ(pp→H)=58.2±8.7σ(pp→H)SM=59.9±2.6 ZZ∗→4ℓ-1s=13.6TeVσfid,γγ=76-13+14σfid,4ℓ=2.80±0.7467.6±3.73.67±0.19σ(pp→H)=67-11+1246±12TeVZZ∗→4ℓσ(pp→H)=58.2±8.7σ(pp→H)SM=59.9±2.6 fb, in agreement with the corresponding Standard Model predictions of ZZ∗→4ℓ-1s=13.6TeVσfid,γγ=76-13+14σfid,4ℓ=2.80±0.7467.6±3.73.67±0.19σ(pp→H)=67-11+1246±12TeVZZ∗→4ℓσ(pp→H)=58.2±8.7σ(pp→H)SM=59.9±2.6 fb and ZZ∗→4ℓ-1s=13.6TeVσfid,γγ=76-13+14σfid,4ℓ=2.80±0.7467.6±3.73.67±0.19σ(pp→H)=67-11+1246±12TeVZZ∗→4ℓσ(pp→H)=58.2±8.7σ(pp→H)SM=59.9±2.6 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 ZZ∗→4ℓ-1s=13.6TeVσfid,γγ=76-13+14σfid,4ℓ=2.80±0.7467.6±3.73.67±0.19σ(pp→H)=67-11+1246±12TeVZZ∗→4ℓσ(pp→H)=58.2±8.7σ(pp→H)SM=59.9±2.6 pb and ZZ∗→4ℓ-1s=13.6TeVσfid,γγ=76-13+14σfid,4ℓ=2.80±0.7467.6±3.73.67±0.19σ(pp→H)=67-11+1246±12TeVZZ∗→4ℓσ(pp→H)=58.2±8.7σ(pp→H)SM=59.9±2.6 pb at 13.6 ZZ∗→4ℓ-1s=13.6TeVσfid,γγ=76-13+14σfid,4ℓ=2.80±0.7467.6±3.73.67±0.19σ(pp→H)=67-11+1246±12TeVZZ∗→4ℓσ(pp→H)=58.2±8.7σ(pp→H)SM=59.9±2.6 from the di-photon and ZZ∗→4ℓ-1s=13.6TeVσfid,γγ=76-13+14σfid,4ℓ=2.80±0.7467.6±3.73.67±0.19σ(pp→H)=67-11+1246±12TeVZZ∗→4ℓσ(pp→H)=58.2±8.7σ(pp→H)SM=59.9±2.6 measurements respectively. The two measurements are combined into a total cross-section measurement of ZZ∗→4ℓ-1s=13.6TeVσfid,γγ=76-13+14σfid,4ℓ=2.80±0.7467.6±3.73.67±0.19σ(pp→H)=67-11+1246±12TeVZZ∗→4ℓσ(pp→H)=58.2±8.7σ(pp→H)SM=59.9±2.6 pb, to be compared with the Standard Model prediction of ZZ∗→4ℓ-1s=13.6TeVσfid,γγ=76-13+14σfid,4ℓ=2.80±0.7467.6±3.73.67±0.19σ(pp→H)=67-11+1246±12TeVZZ∗→4ℓσ(pp→H)=58.2±8.7σ(pp→H)SM=59.9±2.6 pb.