Interference Effect on Resonance Studies in Searches of Heavy Particles

Abstract

The interference between resonance signal and continuum background can be either constructive or destructive, depending on the relative sign of couplings between the signal and background amplitudes. Different interference schemes lead to asymmetric distortions of the resonance line shape, which could be distinguished in experiments, when the internal resonance width is larger than the detector resolution. Interpreting the ATLAS diboson excesses by means of a toy $W^{\prime }$ model as an illustrative example (though it is disfavored by the 13 TeV data), we find that the signs of resonance couplings can only be revealed in the line shape measurements up to a high confidence level at a high luminosity, which could bring us further information on the underlying theory beyond resonance searches at future lepton and hadron colliders.

6 pages, 2 figures, 2 tables, minor corrections, to appear in International Journal of Modern Physics A

References in corpus (18)

• Boosted Decision Trees as an Alternative to Artificial Neural Networks for Particle Identification
• Constraints on the Higgs boson width from off-shell production and decay to Z-boson pairs
• Limitations and Opportunities of Off-Shell Coupling Measurements
• Search for production of $WW/WZ$ resonances decaying to a lepton, neutrino and jets in $pp$ collisions at $\sqrt{s}$ = 8 TeV with the ATLAS detector
• Kaluza-Klein Gluons as a Diagnostic of Warped Models
• Search for resonant diboson production in the $\ell \ell q\bar{q}$ final state in pp collisions at $\sqrt{s}=8$ TeV with the ATLAS detector
• Landau-Yang Theorem and Decays of a Z' Boson into Two Z Bosons
• Higgs couplings: disentangling New Physics with off-shell measurements
• Discriminating spin through quantum interference
• Quantum Interference Effects Among Helicities at LEP-II and Tevatron
• Heavy Higgs signal-background interference in gg --> VV in the Standard Model plus real singlet
• Triboson interpretations of the ATLAS diboson excess
• Augmenting the diboson excess for Run 2
• On-shell interference effects in Higgs final states
• Low Scale Composite Higgs Model and 1.8 $\sim$ 2 TeV Diboson Excess
• Diboson Excesses Demystified in Effective Field Theory Approach
• Excited Gauge and Higgs Bosons in the Unified Composite Model
• Composite Weak Bosons at the LHC

Cited by in corpus (7)

• Multiboson production in W' decays
• Signal-background interference for a singlet spin-0 digluon resonance at the LHC
• Signal-background interference for digluon resonances at the Large Hadron Collider
• Angular observables for spin discrimination in boosted diboson final states
• Diboson resonances within a custodially protected warped extra-dimensional scenario
• Probe $CP$-violating $H\gamma \gamma$ coupling through interferometry
• Enhancing di-jet resonance searches via a final-state radiation jet tagging algorithm