Reinterpreting the results of the LHC with MadAnalysis 5: uncertainties and higher-luminosity estimates

Self Cite

We re-examine current and future constraints on a heavy dilaton coupled to a simple dark sector consisting of a Majorana fermion or a Stückelberg vector field. We include three different treatments of dilaton-Higgs mixing, paying particular attention to a gauge-invariant formulation of the model. Moreover, we also invite readers to re-examine effective field theories of vector dark matter, which we show are missing important terms. Along with the latest Higgs coupling data, heavy scalar search results, and dark matter density/direct detection constraints, we study the LHC bounds on the model and estimate the prospects of dark matter production at the future HL-LHC and 100 TeV FCC colliders. We additionally compute novel perturbative unitarity constraints involving vector dark matter, dilaton and gluon scattering.

Section: Collider Constraintsmentioning

confidence: 53%

Heavy dark matter through the dilaton portal

Fuks

Goodsell

Kang

et al. 2020

Self Cite

“…We therefore follow the procedure outlined in ref. [57] to estimate the full CMS run 2 sensitivity from the CMS-SUS-17-001 one. We recalculate CL s exclusions by extrapolating the background and keeping its relative uncertainty constant, and by assuming that the new number of background events to be equal to the number of observed events.…”

Section: Jhep07(2021)026mentioning

confidence: 99%

Contact interactions and top-philic scalar dark matter

Cornell

Deandrea

Flacke

et al. 2021

Self Cite

We investigate the phenomenology of a scalar top-philic dark matter candidate when adding a dimension-five contact interaction term, as motivated by possible underlying extensions of the Standard Model such as composite Higgs models. We show that the presence of contact interactions can have a major impact on the dark matter relic density as well as on its direct and indirect detection prospects, while the collider phenomenology of the model is unaffected. This underlines the complementarity of collider and cosmological constraints on dark matter models.

“…In our work we use MadAnalysis [95] to cope with these limits at the expected luminosity L = 3000 fb −1 . First, the number of expected background events in this case is calculated as:…”

Section: B Lhc Limits: Signal Regions (Sr) and The Statistical Treatmentmentioning

confidence: 99%

Searching for GeV-scale Majorana Dark Matter: inter spem et metum

Jueid

Nasri

Soualah

2021

We suggest a minimal model for GeV-scale Majorana Dark Matter (DM) coupled to the standard model lepton sector via a charged scalar singlet. We show that there is an anti-correlation between the spin-independent DM-Nucleus scattering cross section (σSI) and the DM relic density for parameters values allowed by various theoretical and experimental constraints. Moreover, we find that even when DM couplings are of order unity, σSI is below the current experimental bound but above the neutrino floor. Furthermore, we show that the considered model can be probed at high energy lepton colliders using e.g. the mono-Higgs production and same-sign charged Higgs pair production.