Measurement of ttH signal strength in the yy decay channel with Run2 pp collision data collected by ATLAS experiment at $\sqrt{s} = 13$ TeV.

Mungo D.P.

I - Fisica nucleare e subnucleare
Aula 32B-1 - Martedì 18 h 10:45 - 13:00
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The latest measurement of the ttH signal strength in the diphoton channel performed by ATLAS experiment using Run2 collision data is presented. Events are classified in orthogonal categories, optimised to isolate ttH events from other production modes and to enhance the expected sensitivity. The categories definition is performed using advanced Machine Learning algorithms. The ttH signal strength is obtained fitting the diphoton invariant mass distributions with a signal plus background analytical model. The results of the combination of this measurement with MultiLepton, 4leptons and bb decay channels are discussed.

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