2016
DOI: 10.1103/physrevd.94.035028
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Fermionic dark matter through a light pseudoscalar portal: Hints from the DAMA results

Abstract: We study the fermionic dark matter (DM) particle interacting with Standard Model quarks via a light pseudoscalar mediator. We consider separately the scenarios for which the DMpseudoscalar coupling is CP conserving or CP violating. We show that taking a contact interaction is not suitable, even when the mediator has a mass of the same order of magnitude as the typical momentum transfer at the direct-detection experiments, such that the allowed DAMA region is excluded or considerably modified by the correct rel… Show more

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Cited by 12 publications
(9 citation statements)
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References 153 publications
(194 reference statements)
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“…Due to the enormous background at these energies, it is extremely difficult to distinguish the dark matter signal from background. In past, dark matter signals have been claimed by some of these searches, however, none of these have stood further detailed scrutiny [9][10][11][12][13].…”
Section: Introductionmentioning
confidence: 99%
“…Due to the enormous background at these energies, it is extremely difficult to distinguish the dark matter signal from background. In past, dark matter signals have been claimed by some of these searches, however, none of these have stood further detailed scrutiny [9][10][11][12][13].…”
Section: Introductionmentioning
confidence: 99%
“…As discussed above, the interaction of the DM candidate with the SM fermions is mediated via the pseudoscalar singlet a. The DM-nucleon interaction in this case, at tree level, would be a spin-dependent interaction [24,20]. The spin-dependent interaction cross-section is highly suppressed since σ SD ∝ v 4 rel and v rel is non-relativistic.…”
Section: Direct Detection Formulationmentioning
confidence: 96%
“…Before initiating the particle dark matter model proposed in the work, in this section, we furnish a simplified framework related to the interaction of a fermionic singlet DM with the SM fermions through a pseudoscalar portal. The Lagrangian for such a scenario can be written as [19,20,21,22],…”
Section: Simplified Annihilation Portal With Pseudoscalarsmentioning
confidence: 99%
“…Simplified DM model frameworks have been used extensively in DM searches at the LHC [9][10][11]. Here, the DM is neutral under the Standard Model (SM) gauge group and interacting with the SM particles via the portal of a single particle [12][13][14][15].…”
Section: Introductionmentioning
confidence: 99%