Quark-flavored scalar dark matter

Abstract

It is an intriguing possibility that dark matter (DM) could have flavor quantum numbers like the quarks. We propose and investigate a class of UV-complete models of this kind, in which the dark matter is in a scalar triplet of an SU(3) flavor symmetry, and interacts with quarks via a colored flavor-singlet fermionic mediator. Such mediators could be discovered at the LHC if their masses are ∼ 1 TeV. We constrain the DM-mediator couplings using relic abundance, direct detection, and flavor-changing neutral-current considerations. We find that, for reasonable values of its couplings, scalar flavored DM can contribute significantly to the real and imaginary parts of the Bs-Bs mixing amplitude. We further assess the potential for such models to explain the galactic center GeV gamma-ray excess.

The waning of the WIMP? A review of models, searches, and constraints

“…22 It is also evident that the DM can be stable only if it is lighter than the t-channel mediator. In order to avoid possible occurrence of flavour violating effects, with consequent strong constraints on the couplings λ Ψ u,d,Q (λ u,d,Q ), we assume that the mediator carries also a flavour quantum number (a "flavored DM" [278][279][280] would be equally feasible), for…”

Electric dipole moment of C13

“…The nucleon tensor charge is the linear coefficient which relates the quark EDM to the nucleon EDM, and the extraction from experimental data shows values smaller than one [131][132][133][134]. Recent lattice QCD analyses give also consistent data [135][136][137][138][139][140][141][142][143]. It is suggested that nucleon charges which give the quark spin in the nonrelativistic limit, such as the axial or tensor charges, are suppressed by the dynamical gluon dressing [144][145][146].…”

Neutron Electric Dipole Moment from Beyond the Standard Model

“…We are extending the calculation of the chromo-EDM by constructing various combinations of the matrix elements that each provide an estimate of F 3 , and by adding the contribution of the disconnected diagrams. To address divergent mixing under renormalization, the RI-sMOM scheme defined in [10] is complicated, so we are evaluating gradient-flow regularization [23]. We will first implement this scheme for the simpler case of the two gluonic operators.…”