# Search for Scalar Diphoton Resonances in the Mass Range $65-600$ GeV with the ATLAS Detector in $pp$ Collision Data at $\sqrt{s}$ = 8 $TeV$

Abstract : A search for scalar particles decaying via narrow resonances into two photons in the mass range $65-600$ GeV is performed using 20.3 fb$^{-1}$ of $\sqrt{s}$ = 8 TeV $pp$ collision data collected with the ATLAS detector at the Large Hadron Collider. The recently discovered Higgs boson is treated as a background. No significant evidence for an additional signal is observed. The results are presented as limits at the 95 % confidence level on the production cross-section of a scalar boson times branching ratio into two photons, in a fiducial volume where the reconstruction efficiency is approximately independent of the event topology. The upper limits set extend over a considerably wider mass range than previous searches.
Document type :
Journal articles

http://hal.in2p3.fr/in2p3-01048570
Contributor : Danielle Cristofol <>
Submitted on : Friday, July 25, 2014 - 8:52:42 AM
Last modification on : Wednesday, September 16, 2020 - 4:27:32 PM

### Citation

G. Aad, L. Alio, M. Barbero, J. C. Clémens, Y. Coadou, et al.. Search for Scalar Diphoton Resonances in the Mass Range $65-600$ GeV with the ATLAS Detector in $pp$ Collision Data at $\sqrt{s}$ = 8 $TeV$. Physical Review Letters, American Physical Society, 2014, 113, pp.171801. ⟨10.1103/PhysRevLett.113.171801⟩. ⟨in2p3-01048570⟩