paper

A resonance without resonance: scrutinizing the diphoton excess at 750 GeV

arXiv:1512.06083 · doi:10.1016/j.physletb.2016.02.041

Abstract

Motivated by the recent diphoton excesses reported by both ATLAS and CMS collaborations, we suggest that a new heavy spinless particle is produced in gluon fusion at the LHC and decays to a couple of lighter pseudoscalars which then decay to photons. The new resonances could arise from a new strongly interacting sector and couple to Standard Model gauge bosons only via the corresponding Wess-Zumino-Witten anomaly. We present a detailed recast of the newest 13 TeV data from ATLAS and CMS together with the 8 TeV data to scan the consistency of the parameter space for those resonances.

8 pages, 4 figures, extended discussion of underlying models, new plots with varying mass of the heavy scalar, to appear in PLB

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