Collider Signatures of Coannihilating Dark Matter in Light of the B-Physics Anomalies

Abstract

Motivated by UV explanations of the $B$-physics anomalies, we study a dark sector containing a Majorana dark matter candidate and a coloured coannihilation partner, connected to the Standard Model predominantly via a $U_1$ vector leptoquark. A TeV scale $U_1$ leptoquark, which couples mostly to third generation fermions, is the only successful single-mediator description of the $B$-physics anomalies. After calculating the dark matter relic surface, we focus on the most promising experimental avenue: LHC searches for the coloured coannihilation partner. We find that the coloured partner hadronizes and forms meson-like bound states leading to resonant signatures at colliders reminiscent of the quarkonia decay modes in the Standard Model. By recasting existing dilepton and monojet searches we exclude coannihilation partner masses less than 280 GeV and 400 GeV, respectively. Since other existing collider searches do not significantly probe the parameter space, we propose a new dedicated search strategy for pair production of the coloured partner decaying into $bb\tau \tau$ final states and dark matter particles. This search is expected to probe the model up to dark matter masses around 600 GeV with current luminosity.

31 pages, 7 figures

References in corpus (24)

• The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations
• An Introduction to PYTHIA 8.2
• Parton distributions in the LHC era: MMHT 2014 PDFs
• B-physics anomalies: a guide to combined explanations
• $R_K$ and future $b\to s\ell \ell$ BSM opportunities
• Confronting lepton flavor universality violation in B decays with high-$p_T$ tau lepton searches at LHC
• Gauge leptoquark as the origin of B-physics anomalies
• Baryon Number and Lepton Universality Violation in Leptoquark and Diquark Models
• Leptoquark model to explain the $B$-physics anomalies, $R_K$ and $R_D$
• On the single leptoquark solutions to the $B$-physics anomalies
• Lepton universality violation and lepton flavor conservation in $B$-meson decays
• Reading the footprints of the B-meson flavor anomalies
• High-pT Signatures in Vector-Leptoquark Models
• Shedding light on the $b\to s$ anomalies with a dark sector
• Muon $g-2$ and $B$-anomalies from Dark Matter
• Pseudo-Dirac Dark Matter Leaves a Trace
• Flavor Non-universal Pati-Salam Unification and Neutrino Masses
• Impact of the $b\to sll$ anomalies on dark matter physics
• Probing Colored Particles with Photons, Leptons, and Jets
• Twin Pati-Salam theory of flavour with a TeV scale vector leptoquark
• Dark matter and $B$-meson anomalies in a flavor dependent gauge symmetry
• Anomalies in $B$ Decays and Muon $g-2$ from Dark Loops
• Systematic approach to $B$-physics anomalies and $t$-channel dark matter
• Leptoquarks and Real Singlets: A Richer Scalar Sector Behind the Origin of Dark Matter

Cited by in corpus (9)

• $B$ Flavour Anomalies: 2021 Theoretical Status Report
• Leptoquark manoeuvres in the dark: a simultaneous solution of the dark matter problem and the $R_{D^{(\ast )}}$ anomalies
• New Physics in $b\to s\mu \mu$: FCC-hh or a Muon Collider?
• Scalar leptoquarks at the LHC and flavour anomalies: a comparison of pair-production modes at NLO-QCD
• Dark Matter abundance via thermal decays and leptoquark mediators
• Impact of electroweak group representation in models for $B$ and $g-2$ anomalies from Dark Loops
• Dark matter freeze-in via a light fermion mediator: forbidden decay and scattering
• The $B$ Anomalies, the $U_1$ Leptoquark and Dark Matter
• Radiative Effects in the Scalar Sector of Vector Leptoquark Models