Search for narrow scalar X→γγ in the mass range 65–600 GeV with the ATLAS detector

Abstract : A search for scalar narrow resonance X decaying into two photons in the mass range 65-600 GeV is performed using 20 fb-1 of pp collision data collected with the ATLAS detector at View the MathML sources=8 TeV at the Large Hadron Collider. The signal associated to the diphoton decay of the Higgs boson with a mass of 125.9 GeV is treated as a background. No significant evidence for an additional signal is observed. The result is presented as a model-independent limit on the production cross-section times the branching fraction BR (X→γγX→γγ), in a fiducial volume where the reconstruction efficiency is independent of the event topology. The upper limits set extend over a considerably wider mass range than the limits previously set by the ATLAS and CMS collaborations.
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Communication dans un congrès
37th International Conference on High Energy Physics (ICHEP 2014), Valencia (Espagne) 02-09/07/2014, Jul 2014, Valencia, Spain. 273-275, pp.2460 - 2462, 2016, Nuclear and Particle Physics Proceedings. 〈http://indico.ific.uv.es/indico/conferenceDisplay.py?confId=2025〉. 〈10.1016/j.nuclphysbps.2015.09.425〉
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Soumis le : jeudi 26 janvier 2017 - 15:31:57
Dernière modification le : jeudi 11 janvier 2018 - 06:13:33

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Zuzana Barnovska. Search for narrow scalar X→γγ in the mass range 65–600 GeV with the ATLAS detector. 37th International Conference on High Energy Physics (ICHEP 2014), Valencia (Espagne) 02-09/07/2014, Jul 2014, Valencia, Spain. 273-275, pp.2460 - 2462, 2016, Nuclear and Particle Physics Proceedings. 〈http://indico.ific.uv.es/indico/conferenceDisplay.py?confId=2025〉. 〈10.1016/j.nuclphysbps.2015.09.425〉. 〈in2p3-01447076〉

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