Exploring Peaks and Valleys in the Diphoton Spectrum
Nathaniel Craig, Sophie Renner, Dave Sutherland
TL;DR
This paper studies how resonance-continuum interference impacts the diphoton spectrum at the LHC, revealing significant effects on resonance parameter extraction, especially for spin-2 states produced via quarks.
Contribution
It provides a detailed analysis of interference effects on diphoton signals, highlighting their importance for accurate resonance measurements at the LHC.
Findings
Interference significantly alters diphoton resonance shapes.
Effects are more pronounced for spin-2 resonances produced via quarks.
Analysis applied to LHC 8 and 13 TeV data.
Abstract
We investigate the effects of resonance-continuum interference on the diphoton spectrum in the presence of a new spin-0 or spin-2 state produced via gluons or quarks and decaying to pairs of photons. Interference effects can significantly influence the extraction of resonance masses and widths from the diphoton spectrum, particularly in the case of a spin-2 resonance produced via quarks. We illustrate these effects via a binned likelihood analysis of LHC diphoton data at both 8 and 13 TeV.
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