Evidences for a pseudo scalar resonance at 400 GeV Possible interpretations

20 Apr 2020  ·  Richard Francois ·

This paper intends to collect the various evidences observed by ATLAS and CMS within searches for heavy scalars and pseudocalars. These searches in tt, hZ, tautau and 2jets+W, obtain individual excesses in five channels, each at a modest level of significance, ~3 standard deviations, but, put together, give a strong evidence for a pseudoscalar at ~400 GeV. Preliminary interpretations are given which suggest that additional observations should appear in the HL-LHC phase.

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High Energy Physics - Phenomenology High Energy Physics - Experiment