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• W3201486896 abstract "A bstract We study a simplified model of flavoured Majorana dark matter in the Dark Minimal Flavour Violation framework. The model extends the Standard Model by a dark matter flavour triplet and a scalar mediator, through which the new dark fermions couple to right-handed up-type quarks. This interaction is governed by a new coupling matrix λ which is assumed to constitute the only new source of flavour and CP violation. We analyse the parameter space of this model by using constraints from collider searches, D 0 − $$ overline{D} $$ <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML> <mml:mover> <mml:mi>D</mml:mi> <mml:mo>¯</mml:mo> </mml:mover> </mml:math> 0 mixing, cosmology and direct dark matter searches. Throughout our study, we point out crucial differences between the Majorana and Dirac dark matter cases. After performing a combined analysis within the context of all the experimental constraints mentioned above, we analyse which flavour for the dark matter particle is preferred by experimental data. We further investigate if this model is capable of explaining the large measured value of the direct CP asymmetry $$ Delta {A}_{mathrm{CP}}^{mathrm{dir}} $$ <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML> <mml:mtext>∆</mml:mtext> <mml:msubsup> <mml:mi>A</mml:mi> <mml:mi>CP</mml:mi> <mml:mi>dir</mml:mi> </mml:msubsup> </mml:math> in charm decays. We find that significant enhancements with respect to the Standard Model expectation are compatible with all constraints, and even the central value of the measurement can be reached. We also advertise the flavour-violating final state with two same-sign top quarks produced in association with missing transverse energy as a smoking-gun signature for flavoured Majorana dark matter at the LHC." @default.
• W3201486896 created "2021-09-27" @default.
• W3201486896 creator A5032603371 @default.
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• W3201486896 date "2022-05-13" @default.
• W3201486896 modified "2023-10-14" @default.
• W3201486896 title "Tasting flavoured Majorana dark matter" @default.
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• W3201486896 doi "https://doi.org/10.1007/jhep05(2022)086" @default.
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