{"@context":"http://schema.org","@id":"https://doi.org/10.17182/hepdata.94286.v1","@reverse":{"isBasedOn":[{"@type":"ScholarlyArticle","identifier":{"@type":"PropertyValue","propertyID":"URL","value":"https://inspirehep.net/literature/1787821"}},{"@id":"https://doi.org/10.1103/PhysRevLett.125.061801","@type":"JournalArticle"}]},"@type":"Dataset","additionalType":"Collection","author":{"@type":"Organization","name":"CMS Collaboration"},"creator":{"@type":"Organization","name":"CMS Collaboration"},"datePublished":"2021","description":"The first observation of the $\\mathrm{t\\bar{t}}$H process in a single Higgs boson decay channel with the full reconstruction of the final state (H$\\to\\gamma\\gamma$) is presented, with a significance of 6.6 standard deviations ($\\sigma$). The CP structure of Higgs boson couplings to fermions is measured, resulting in an exclusion of the pure CP-odd structure of the top Yukawa coupling at 3.2$\\sigma$. The measurements are based on a sample of proton-proton collisions at a center-of-mass energy $\\sqrt{s} =$ 13 TeV collected by the CMS detector at the LHC, corresponding to an integrated luminosity of 137 fb$^{-1}$. The cross section times branching fraction of the $\\mathrm{t\\bar{t}}$H process is measured to be $\\sigma_{\\mathrm{t\\bar{t}H}}\\mathcal{B}_{\\gamma\\gamma} =$ 1.56 $^{+0.34}_{-0.32}$ fb, which is compatible with the standard model prediction of 1.13 $^{+0.08}_{-0.11}$ fb. The fractional contribution of the CP-odd component is measured to be $f^{\\mathrm{Htt}}_\\mathrm{CP} =$ 0.00 $\\pm$ 0.33.","hasPart":[{"@id":"https://doi.org/10.17182/hepdata.94286.v1/t1","@type":"Dataset","description":"measured cross section times branch ratio","name":"Table 1"},{"@id":"https://doi.org/10.17182/hepdata.94286.v1/t2","@type":"Dataset","description":"measured cross section times branch divided by SM prediction","name":"Table 2"},{"@id":"https://doi.org/10.17182/hepdata.94286.v1/t3","@type":"Dataset","description":"Observed significance","name":"Table 3"},{"@id":"https://doi.org/10.17182/hepdata.94286.v1/t4","@type":"Dataset","description":"constraint on CP-odd contribution at 68% CL","name":"Table 4"},{"@id":"https://doi.org/10.17182/hepdata.94286.v1/t5","@type":"Dataset","description":"exclusion significance on pure CP odd contribution","name":"Table 5"}],"identifier":[{"@type":"PropertyValue","propertyID":"HEPDataRecord","value":"https://www.hepdata.net/record/ins1787821?version=1"},{"@type":"PropertyValue","propertyID":"HEPDataRecordAlt","value":"https://www.hepdata.net/record/94286"}],"inLanguage":"en","name":"Measurements of $\\mathrm{t\\bar{t}}$H production and the CP structure of the Yukawa interaction between the Higgs boson and top quark in the diphoton decay channel","provider":{"@type":"Organization","name":"HEPData"},"publisher":{"@type":"Organization","name":"HEPData"},"url":"https://www.hepdata.net/record/ins1787821?version=1","version":1}