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Search for Higgs bosons decaying to photons in the CMS detector

We present a new result in the search for Higgs bosons decaying into two photons at the CMS detector using the full LHC Run 1 dataset. The data samples correspond to integrated luminosities of 5.1~fb$^{-1}$ and 19.7~fb$^{-1}$ at centre-of-mass energies of $7$~TeV and $8$~TeV respectively. A clear si...

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Detalles Bibliográficos
Autor principal: Kenzie, Matthew William
Lenguaje:eng
Publicado: 2014
Materias:
Acceso en línea:https://dx.doi.org/10.1016/j.nuclphysbps.2015.09.134
http://cds.cern.ch/record/1955163
Descripción
Sumario:We present a new result in the search for Higgs bosons decaying into two photons at the CMS detector using the full LHC Run 1 dataset. The data samples correspond to integrated luminosities of 5.1~fb$^{-1}$ and 19.7~fb$^{-1}$ at centre-of-mass energies of $7$~TeV and $8$~TeV respectively. A clear signal is observed in the diphoton channel at a mass close to 125~GeV with a local significance of 5.7~$\sigma$, where 5.2~$\sigma$ is expected from the standard model Higgs boson. The mass is measured to be $124.70\pm0.34$~GeV $=124.70\pm0.31\mathrm{(stat)}\pm0.15\mathrm{(syst)}$~GeV and the signal strength relative to the standard model prediction is found to be $1.14^{+0.26}_{-0.23} = 1.14\pm{0.21} \mathrm{(stat)} ^{+0.09}_{-0.05} \mathrm{(syst)} ^{+0.13}_{-0.09} \mathrm{(theo)}$. Additional results include measurements of the signal strength modifiers with respect to different production mechanisms.