# Search for Higgs and $Z$ Boson Decays to $J/\psi\gamma$ and $\Upsilon(nS)\gamma$ with the ATLAS Detector

Abstract : A search for the decays of the Higgs and $Z$ bosons to $J/\psi\gamma$ and $\Upsilon(nS)\gamma$ ($n=1,2,3$) is performed with $pp$ collision data samples corresponding to integrated luminosities of up to $20.3\mathrm{fb}^{-1}$ collected at $\sqrt{s}=8\mathrm{TeV}$ with the ATLAS detector at the CERN Large Hadron Collider. No significant excess of events is observed above expected backgrounds and 95% CL upper limits are placed on the branching fractions. In the $J/\psi\gamma$ final state the limits are $1.5\times10^{-3}$ and $2.6\times10^{-6}$ for the Higgs and $Z$ bosons, respectively, while in the $\Upsilon(1S,2S,3S)\,\gamma$ final states the limits are $(1.3,1.9,1.3)\times10^{-3}$ and $(3.4,6.5,5.4)\times10^{-6}$, respectively.
Type de document :
Article dans une revue
Physical Review Letters, American Physical Society, 2015, 114 (12), pp.121801. 〈10.1103/PhysRevLett.114.121801〉
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http://hal.in2p3.fr/in2p3-01103567
Contributeur : Emmanuelle Vernay <>
Soumis le : jeudi 15 janvier 2015 - 08:38:52
Dernière modification le : mardi 5 juin 2018 - 16:40:03

### Citation

G. Aad, S. Albrand, J. Brown, J. Collot, S. Crépé-Renaudin, et al.. Search for Higgs and $Z$ Boson Decays to $J/\psi\gamma$ and $\Upsilon(nS)\gamma$ with the ATLAS Detector. Physical Review Letters, American Physical Society, 2015, 114 (12), pp.121801. 〈10.1103/PhysRevLett.114.121801〉. 〈in2p3-01103567〉

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