@misc{10481/57793,
year = {2018},
month = {9},
url = {http://hdl.handle.net/10481/57793},
abstract = {Properties of the Higgs boson are measured in the two-photon final state using 36.1 fb−1 of proton–
proton collision data recorded at
ffiffiffis
p
¼ 13 TeV by the ATLAS experiment at the Large Hadron Collider.
Cross-section measurements for the production of a Higgs boson through gluon–gluon fusion, vectorboson
fusion, and in association with a vector boson or a top-quark pair are reported. The signal strength,
defined as the ratio of the observed to the expected signal yield, is measured for each of these production
processes as well as inclusively. The global signal strength measurement of 0.99   0.14 improves on the
precision of the ATLAS measurement at
ffiffiffis
p
¼ 7 and 8 TeV by a factor of two. Measurements of gluon–
gluon fusion and vector-boson fusion productions yield signal strengths compatible with the Standard
Model prediction. Measurements of simplified template cross sections, designed to quantify the different
Higgs boson production processes in specific regions of phase space, are reported. The cross section for the
production of the Higgs boson decaying to two isolated photons in a fiducial region closely matching the
experimental selection of the photons is measured to be 55   10 fb, which is in good agreement with
the Standard Model prediction of 64   2 fb. Furthermore, cross sections in fiducial regions enriched in
Higgs boson production in vector-boson fusion or in association with large missing transverse momentum,
leptons or top-quark pairs are reported. Differential and double-differential measurements are performed
for several variables related to the diphoton kinematics as well as the kinematics and multiplicity of the
jets produced in association with a Higgs boson. These differential cross sections are sensitive to higher
order QCD corrections and properties of the Higgs boson, such as its spin and CP quantum numbers.
No significant deviations from a wide array of Standard Model predictions are observed. Finally, the
strength and tensor structure of the Higgs boson interactions are investigated using an effective Lagrangian,
which introduces additional CP-even and CP-odd interactions. No significant new physics contributions
are observed.},
organization = {We
acknowledge the support of ANPCyT, Argentina; YerPhI,
Armenia; ARC, Australia; BMWFW and FWF, Austria;
ANAS, Azerbaijan; SSTC, Belarus; CNPq and FAPESP,
Brazil; NSERC,NRCand CFI, Canada; CERN; CONICYT,
Chile; CAS, MOST and NSFC, China; COLCIENCIAS,
Colombia; MSMT CR, MPO CR and VSC CR, Czech
Republic; DNRF and DNSRC, Denmark; IN2P3-CNRS,
CEA-DRF/IRFU, France; SRNSFG,Georgia;BMBF, HGF,
and MPG, Germany; GSRT, Greece; RGC, Hong Kong
SAR, China; ISF, I-CORE and Benoziyo Center, Israel;
INFN, Italy; MEXT and JSPS, Japan; CNRST, Morocco;
NWO, Netherlands; RCN, Norway; MNiSW and NCN,
Poland;FCT, Portugal; MNE/IFA, Romania;MESofRussia
and NRC KI, Russian Federation; JINR; MESTD, Serbia;
MSSR, Slovakia; ARRS and MIZŠ, Slovenia; DST/NRF,
South Africa; MINECO, Spain; SRC and Wallenberg
Foundation, Sweden; SERI, SNSF and Cantons of Bern
and Geneva, Switzerland; MOST, Taiwan; TAEK, Turkey;
STFC, United Kingdom; DOE and NSF, United States of
America. In addition, individual groups and members have
received support from BCKDF, the Canada Council,
CANARIE, CRC, Compute Canada, FQRNT, and the
Ontario Innovation Trust, Canada; EPLANET, ERC,
ERDF, FP7, Horizon 2020 and Marie Skłodowska-Curie
Actions, European Union; Investissements d’Avenir Labex
and Idex, ANR, R´egion Auvergne and Fondation Partager le
Savoir, France; DFG and AvH Foundation, Germany;
Herakleitos, Thales and Aristeia programmes co-financed
by EU-ESF and the Greek NSRF; BSF, GIF and Minerva,
Israel; BRF, Norway; CERCA Programme Generalitat de
Catalunya, GeneralitatValenciana, Spain; 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.},
publisher = {American Physical Society},
title = {Measurements of Higgs boson properties in the diphoton decay channel with 36 fb− 1 of pp collision data at root s p =13 TeV with the ATLAS detector},
doi = {10.1103/PhysRevD.98.052005},
author = {Aaboud, M. and Aguilar Saavedra, Juan Antonio and Atlas Collaboration},
}