Observation of the diphoton decay of the Higgs boson and measurement of its properties
Abstract
Observation of the diphoton decay mode of the recently discovered Higgs boson and measurement of some of its properties are reported. The analysis uses the entire dataset collected by the CMS experiment in proton-proton collisions during the 2011 and 2012 LHC running periods. The data samples correspond to integrated luminosities of 5.1[Formula: see text]at [Formula: see text] and 19.7[Formula: see text]at 8[Formula: see text] . A clear signal is observed in the diphoton channel at a mass close to 125[Formula: see text] with a local significance of [Formula: see text], where a significance of [Formula: see text] is expected for the standard model Higgs boson. The mass is measured to be [Formula: see text] , and the best-fit signal strength relative to the standard model prediction is [Formula: see text][Formula: see text][Formula: see text]. Additional measurements include the signal strength modifiers associated with different production mechanisms, and hypothesis tests between spin-0 and spin-2 models.
Funding
- Departamento Administrativo de Ciencia, Tecnología e Innovación (COLCIENCIAS)
- CERN
- Deutsche Forschungsgemeinschaft
- Fundação de Amparo à Pesquisa do Estado de São Paulo
- National Natural Science Foundation of China
- Research Promotion Foundation
- Eesti Teadusagentuur
- Coordenação de Aperfeiçoamento de Pessoal de Nível Superior
- Academy of Finland
- Bundesministerium für Bildung und Forschung
- Chinese Academy of Sciences
- Austrian Science Fund
- Bundesministerium für Wissenschaft, Forschung und Wirtschaft
- General Secretariat for Research and Technology
- Conselho Nacional de Desenvolvimento Científico e Tecnológico
- Ministry of Education, Science and Technology
- Hrvatska Zaklada za Znanost
- Fundação Carlos Chagas Filho de Amparo à Pesquisa do Estado do Rio de Janeiro
- Centre National de la Recherche Scientifique
- School of Mathematics, Institute for Research in Fundamental Sciences
- Commissariat à l'Énergie Atomique et aux Énergies Alternatives
- Istituto Nazionale di Fisica Nucleare
- Science and Technology Facilities Council
- European Regional Development Fund
- Institut National de Physique Nucléaire et de Physique des Particules
How this paper connects to the literature. Drag to explore, click any node to open that paper.
