Characterizing dark matter at the LHC in Drell-Yan events

Abstract

Spectral features in LHC dileptonic events may signal radiative corrections coming from new degrees of freedom, notably dark matter and mediators. Using simplified models, we show how these features can reveal the fundamental properties of the dark sector, such as self-conjugation, spin and mass of dark matter, and the quantum numbers of the mediator. Distributions of both the invariant mass $m_{\ell \ell }$ and the Collins-Soper scattering angle $cos{\theta }_{CS}$ are studied to pinpoint these properties. We derive constraints on the models from LHC measurements of $m_{\ell \ell }$ and $cos{\theta }_{CS}$, which are competitive with direct detection and jets + Missing Energy searches. We find that in certain scenarios the $cos{\theta }_{CS}$ spectrum provides the strongest bounds, underlying the importance of scattering angle measurements for non-resonant new physics.

18 pages, 9 figures, 1 table

References in corpus (26)

• The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations
• Parton distributions for the LHC
• New parton distributions for collider physics
• Search for high-mass dilepton resonances in pp collisions at sqrt(s) = 8 TeV with the ATLAS detector
• Scalar Simplified Models for Dark Matter
• Search for physics beyond the standard model in dilepton mass spectra in proton-proton collisions at sqrt(s) = 8 TeV
• Deducing the nature of dark matter from direct and indirect detection experiments in the absence of collider signatures of new physics
• Constraining Dark Sectors at Colliders: Beyond the Effective Theory Approach
• Distinguishing Spins in Decay Chains at the Large Hadron Collider
• Majorana Dark Matter with a Coloured Mediator: Collider vs Direct and Indirect Searches
• Model-Independent Determination of the WIMP Mass from Direct Dark Matter Detection Data
• Anticipating Non-Resonant New Physics in Dilepton Angular Spectra at the LHC
• Search for contact interactions and large extra dimensions in the dilepton channel using proton-proton collisions at $\sqrt{s}$ = 8 TeV with the ATLAS detector
• A General Method for Model-Independent Measurements of Particle Spins, Couplings and Mixing Angles in Cascade Decays with Missing Energy at Hadron Colliders
• Lepton-Flavored Dark Matter
• Leptophilic Dark Matter in Lepton Interactions at LEP and ILC
• Running Electroweak Couplings as a Probe of New Physics
• Effective Theory and Simple Completions for Neutrino Interactions
• Forbidden Dark Matter at the Weak Scale via the Top Portal
• Estimated constraints on t-channel Leptoquark exchange from LHC contact interaction searches
• Dark Matter Signals in Dilepton Production at Hadron Colliders
• Prospects for determining the particle/antiparticle nature of WIMP dark matter with direct detection experiments
• General analysis of signals with two leptons and missing energy at the Large Hadron Collider
• Testing Grand Unification at the (S)LHC
• New Physics from the Top at the LHC
• Spectral Decomposition of Missing Transverse Energy at Hadron Colliders

Cited by in corpus (9)

• Hunting leptoquarks in monolepton searches
• The Dark Side of Flipped Trinification
• Effective Leptophilic WIMPs at the $e^{+}{e}^{-}$ collider
• Determining Dark Matter properties with a XENONnT/LZ signal and LHC-Run3 mono-jet searches
• Compatibility of a dark matter discovery at XENONnT/LZ with the WIMP thermal production mechanism
• The Radiation Valley and Exotic Resonances in $W\gamma$ Production at the LHC
• Interference effects in dilepton resonance searches for Z' bosons and dark matter mediators
• Measurement of the Drell-Yan forward-backward asymmetry at high dilepton masses in proton-proton collisions at $\sqrt{s}=$ 13 TeV
• Simplified Dark Matter Models