Measurement of the H→ γγ and H→ ZZ∗→ 4 ℓ cross-sections in pp collisions at √s=13.6 TeV with the ATLAS detector
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jats:titleAbstract</jats:title>jats:pThe inclusive Higgs boson production cross-section is measured in the di-photon and the jats:inline-formulajats:alternativesjats:tex-math$$ZZ^* \rightarrow 4 \ell $$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> mml:mrow mml:miZ</mml:mi> mml:msup mml:miZ</mml:mi> mml:mo∗</mml:mo> </mml:msup> mml:mo→</mml:mo> mml:mn4</mml:mn> mml:miℓ</mml:mi> </mml:mrow> </mml:math></jats:alternatives></jats:inline-formula> decay channels using 31.4 and 29.0 fbjats:inline-formulajats:alternativesjats:tex-math$$^{-1}$$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> mml:msup <mml:mrow /> mml:mrow mml:mo-</mml:mo> mml:mn1</mml:mn> </mml:mrow> </mml:msup> </mml:math></jats:alternatives></jats:inline-formula> of jats:italicpp</jats:italic> collision data respectively, collected with the ATLAS detector at a centre-of-mass energy of jats:inline-formulajats:alternativesjats:tex-math$$\sqrt{s}=13.6$$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> mml:mrow mml:msqrt mml:mis</mml:mi> </mml:msqrt> mml:mo=</mml:mo> mml:mn13.6</mml:mn> </mml:mrow> </mml:math></jats:alternatives></jats:inline-formula> jats:inline-formulajats:alternativesjats:tex-math$$\text {TeV}$$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> mml:mtextTeV</mml:mtext> </mml:math></jats:alternatives></jats:inline-formula>. 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 jats:inline-formulajats:alternativesjats:tex-math$$\sigma {\textrm{fid},\gamma \gamma } = $$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> mml:mrow mml:msub mml:miσ</mml:mi> mml:mrow mml:mtextfid</mml:mtext> mml:mo,</mml:mo> mml:miγ</mml:mi> mml:miγ</mml:mi> </mml:mrow> </mml:msub> mml:mo=</mml:mo> </mml:mrow> </mml:math></jats:alternatives></jats:inline-formula> jats:inline-formulajats:alternativesjats:tex-math$$76^{+14}{-13}$$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> mml:msubsup mml:mn76</mml:mn> mml:mrow mml:mo-</mml:mo> mml:mn13</mml:mn> </mml:mrow> mml:mrow mml:mo+</mml:mo> mml:mn14</mml:mn> </mml:mrow> </mml:msubsup> </mml:math></jats:alternatives></jats:inline-formula> fb, and jats:inline-formulajats:alternativesjats:tex-math$$\sigma {\textrm{fid},4 \ell } =$$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> mml:mrow mml:msub mml:miσ</mml:mi> mml:mrow mml:mtextfid</mml:mtext> mml:mo,</mml:mo> mml:mn4</mml:mn> mml:miℓ</mml:mi> </mml:mrow> </mml:msub> mml:mo=</mml:mo> </mml:mrow> </mml:math></jats:alternatives></jats:inline-formula> jats:inline-formulajats:alternativesjats:tex-math$$2.80, \pm , 0.74$$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> mml:mrow mml:mn2.80</mml:mn> <mml:mspace /> mml:mo±</mml:mo> <mml:mspace /> mml:mn0.74</mml:mn> </mml:mrow> </mml:math></jats:alternatives></jats:inline-formula> fb, in agreement with the corresponding Standard Model predictions of jats:inline-formulajats:alternativesjats:tex-math$$67.6 \pm 3.7 $$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> mml:mrow mml:mn67.6</mml:mn> mml:mo±</mml:mo> mml:mn3.7</mml:mn> </mml:mrow> </mml:math></jats:alternatives></jats:inline-formula> fb and jats:inline-formulajats:alternativesjats:tex-math$$3.67 \pm 0.19 $$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> mml:mrow mml:mn3.67</mml:mn> mml:mo±</mml:mo> mml:mn0.19</mml:mn> </mml:mrow> </mml:math></jats:alternatives></jats:inline-formula> 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 jats:inline-formulajats:alternativesjats:tex-math$$\sigma (pp \rightarrow H) = 67^{+12}{-11}$$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> mml:mrow mml:miσ</mml:mi> mml:mrow mml:mo(</mml:mo> mml:mip</mml:mi> mml:mip</mml:mi> mml:mo→</mml:mo> mml:miH</mml:mi> mml:mo)</mml:mo> </mml:mrow> mml:mo=</mml:mo> mml:msubsup mml:mn67</mml:mn> mml:mrow mml:mo-</mml:mo> mml:mn11</mml:mn> </mml:mrow> mml:mrow mml:mo+</mml:mo> mml:mn12</mml:mn> </mml:mrow> </mml:msubsup> </mml:mrow> </mml:math></jats:alternatives></jats:inline-formula> pb and jats:inline-formulajats:alternativesjats:tex-math$$46 \pm 12$$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> mml:mrow mml:mn46</mml:mn> mml:mo±</mml:mo> mml:mn12</mml:mn> </mml:mrow> </mml:math></jats:alternatives></jats:inline-formula> pb at 13.6 jats:inline-formulajats:alternativesjats:tex-math$$\text {TeV}$$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> mml:mtextTeV</mml:mtext> </mml:math></jats:alternatives></jats:inline-formula> from the di-photon and jats:inline-formulajats:alternativesjats:tex-math$$ZZ^* \rightarrow 4 \ell $$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> mml:mrow mml:miZ</mml:mi> mml:msup mml:miZ</mml:mi> mml:mo∗</mml:mo> </mml:msup> mml:mo→</mml:mo> mml:mn4</mml:mn> mml:miℓ</mml:mi> </mml:mrow> </mml:math></jats:alternatives></jats:inline-formula> measurements respectively. The two measurements are combined into a total cross-section measurement of jats:inline-formulajats:alternativesjats:tex-math$$\sigma (pp \rightarrow H)= 58.2 \pm 8.7$$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> mml:mrow mml:miσ</mml:mi> mml:mo(</mml:mo> mml:mip</mml:mi> mml:mip</mml:mi> mml:mo→</mml:mo> mml:miH</mml:mi> mml:mo)</mml:mo> mml:mo=</mml:mo> mml:mn58.2</mml:mn> mml:mo±</mml:mo> mml:mn8.7</mml:mn> </mml:mrow> </mml:math></jats:alternatives></jats:inline-formula> pb, to be compared with the Standard Model prediction of jats:inline-formulajats:alternativesjats:tex-math$$\sigma (pp \rightarrow H)_\textrm{SM} = 59.9 \pm 2.6 $$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> mml:mrow mml:miσ</mml:mi> mml:msub mml:mrow mml:mo(</mml:mo> mml:mip</mml:mi> mml:mip</mml:mi> mml:mo→</mml:mo> mml:miH</mml:mi> mml:mo)</mml:mo> </mml:mrow> mml:mtextSM</mml:mtext> </mml:msub> mml:mo=</mml:mo> mml:mn59.9</mml:mn> mml:mo±</mml:mo> mml:mn2.6</mml:mn> </mml:mrow> </mml:math></jats:alternatives></jats:inline-formula> pb.</jats:p>
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Acknowledgements: We thank CERN for the very successful operation of the LHC, as well as the support staff from our institutions without whom ATLAS could not be operated efficiently. We acknowledge the support of ANPCyT, Argentina; YerPhI, Armenia; ARC, Australia; BMWFW and FWF, Austria; ANAS, Azerbaijan; CNPq and FAPESP, Brazil; NSERC, NRC and CFI, Canada; CERN; ANID, Chile; CAS, MOST and NSFC, China; Minciencias, Colombia; MEYS CR, Czech Republic; DNRF and DNSRC, Denmark; IN2P3-CNRS and CEA-DRF/IRFU, France; SRNSFG, Georgia; BMBF, HGF and MPG, Germany; GSRI, Greece; RGC and Hong Kong SAR, China; ISF and Benoziyo Center, Israel; INFN, Italy; MEXT and JSPS, Japan; CNRST, Morocco; NWO, Netherlands; RCN, Norway; MEiN, Poland; FCT, Portugal; MNE/IFA, Romania; MESTD, Serbia; MSSR, Slovakia; ARRS and MIZŠ, Slovenia; DSI/NRF, South Africa; MICINN, Spain; SRC and Wallenberg Foundation, Sweden; SERI, SNSF and Cantons of Bern and Geneva, Switzerland; MOST, Taiwan; TENMAK, Türkiye; STFC, United Kingdom; DOE and NSF, United States of America. In addition, individual groups and members have received support from BCKDF, CANARIE, Compute Canada and CRC, Canada; PRIMUS 21/SCI/017 and UNCE SCI/013, Czech Republic; COST, ERC, ERDF, Horizon 2020 and Marie Skłodowska-Curie Actions, European Union; Investissements d’Avenir Labex, Investissements d’Avenir Idex and ANR, France; DFG and AvH Foundation, Germany; Herakleitos, Thales and Aristeia programmes co-financed by EU-ESF and the Greek NSRF, Greece; BSF-NSF and MINERVA, Israel; Norwegian Financial Mechanism 2014–2021, Norway; NCN and NAWA, Poland; La Caixa Banking Foundation, CERCA Programme Generalitat de Catalunya and PROMETEO and GenT Programmes Generalitat Valenciana, Spain; Göran Gustafssons Stiftelse, Sweden; The Royal Society and Leverhulme Trust, United Kingdom. The crucial computing support from all WLCG partners is acknowledged gratefully, in particular from CERN, the ATLAS Tier-1 facilities at TRIUMF (Canada), NDGF (Denmark, Norway, Sweden), CC-IN2P3 (France), KIT/GridKA (Germany), INFN-CNAF (Italy), NL-T1 (Netherlands), PIC (Spain), ASGC (Taiwan), RAL (UK) and BNL (USA), the Tier-2 facilities worldwide and large non-WLCG resource providers. Major contributors of computing resources are listed in Ref. [121].
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1434-6052