Thermal WIMPs and the scale of new physics: global fits of Dirac dark matter effective field theories

Abstract

We assess the status of a wide class of WIMP dark matter (DM) models in light of the latest experimental results using the global fitting framework . We perform a global analysis of effective field theory (EFT) operators describing the interactions between a gauge-singlet Dirac fermion and the Standard Model quarks, the gluons and the photon. In this bottom-up approach, we simultaneously vary the coefficients of 14 such operators up to dimension 7, along with the DM mass, the scale of new physics and several nuisance parameters. Our likelihood functions include the latest data from Planck, direct and indirect detection experiments, and the LHC. For DM masses below 100 GeV, we find that it is impossible to satisfy all constraints simultaneously while maintaining EFT validity at LHC energies. For new physics scales around 1 TeV, our results are influenced by several small excesses in the LHC data and depend on the prescription that we adopt to ensure EFT validity. Furthermore, we find large regions of viable parameter space where the EFT is valid and the relic density can be reproduced, implying that WIMPs can still account for the DM of the universe while being consistent with the latest data.

Effective field theory analysis of dark matter-standard model interactions with spin one mediators

“…We consider that equality a safe limit for the convergence of the effective theory, as discussed in [63]. Also in [68], the authors use the same relationship for their calculations to be meaningful in the EFT framework.…”

BSM Developments and Tools

“…GAMBIT contains a huge library of likelihoods and observables for collider physics [15], dark matter [43], flavour [61], precision observables [62], neutrino physics [63] and cosmology [64], as well as an extensive database of models and sampling strategies, both frequentist and Bayesian [65]. GAMBIT has been employed in studies of a large variety of BSM modes, including SUSY models [66][67][68], Higgs-portal DM models [44,69,70], EFT DM models [71], axion and axion-like particle models [72,73], models with right-handed neutrinos [63], fits of neutral flavour anomalies [74] and cosmological fits of neutrino masses [75].…”

Likelihood analysis of the flavour anomalies and g – 2 in the general two Higgs doublet model

“…GAMBIT is a powerful software framework capable of performing statistical inference studies using constraints from collider [96], dark matter [97], flavour [98] and neutrino [99] physics, as well as cosmology [100]. It has already been used for detailed statistical analyses of a variety of beyond the Standard Model (BSM) models, including supersymmetry [101][102][103], scalar singlet DM [104][105][106][107][108], axion and axion-like particles [109,110], and neutrinos [99,111], as well as an initial analysis of the 2HDM [112]. Our work enhances the FlavBit [98] and Pre-cisionBit [113] modules of GAMBIT to support the GTHDM.…”