Dark matter within the minimal flavour violation ansatz

Abstract

Minimal Flavour Violation hypothesis can provide an attractive framework for Dark Matter (DM). We consider scalar DM candidates carrying flavour quantum numbers and whose representation under the flavour group guarantees DM stability. They interact with the Standard Model fields through Higgs portal at renormalisable level and also to quarks through dimension-6 operators. We provide a systematic analysis of the viable parameter space for the DM fields, which are triplet of the flavour group, considering several DM-quark interactions. In this framework, we analyse in which cases the viable parameter space differs from Higgs portal models thanks to the underlying flavour structure. In contrast to minimal Higgs portal scenarios, we find that light DM in the GeV mass range as well as heavier candidates above Higgs resonance could be allowed by colliders, direct and indirect DM detection searches as well as flavour constraints. The large mass regime above m t could even be beyond the reach of future experiments such as Xenon 1T.

Revisiting Minimal Lepton Flavour Violation in the light of leptonic CP violation

“…[66][67][68][69][70][71][72][73][74][75]). It is instead a framework where observed flavour violating observables are described in agreement with data and unobserved flavour violating signals are not expected to be observed with the current experimental sensitivities, but could be observable in the future planned experiments with significantly higher sensitivity, assuming the New Physics (NP) responsible for these phenomenology at the TeV scale or slightly higher [61][62][63][64][65][76][77][78][79][80][81][82][83][84][85][86][87][88][89].…”

“…data [61,76,[78][79][80][81][82][83][84][85][86][155][156][157][158][159][160]; unseen flavour changing processes, for example leptonic radiative rare decays, are predicted to have strengths which are inside the present experimental sensitivity [62,63,65,88,[161][162][163][164].…”

Lepton-flavored scalar dark matter with minimal flavor violation

“…In section 3, we describe the Lagrangians with MFV built-in for the scalar triplet. We assign its quantum numbers in analogy to its quark-flavor counterpart discussed in the literature [14,25]. Accordingly, the triplet can interact with SM particles via a Higgsboson portal at the renormalizable level and also couple to SM leptons through effective dimension-six operators.…”

“…In contrast, the only experimental information on h → µ + µ − are the bounds B(h → µμ) < 1.5 × 10 −3 and 1.6 × 10 −3 from ATLAS and CMS, respectively [86,87]. In view of these data, we demand the S k contributions to respect 25) where Γ SM h→ττ = 257 keV and Γ SM h→µμ = 894 eV [53] for m h = 125.1 GeV. Due to the lnΛ dependence of y new bd , we also set κ LR = 1.…”

Flavored dark matter and the Galactic Center gamma-ray excess

“…The stability in this framework is a consequence of Flavor Triality, a Z 3 discrete symmetry which is a remnant of the non-Abelian color and quark flavor symmetries [17]. In various guises, FDM has been previously investigated on numerous occasions [18][19][20][21][22].…”