Signatures of top flavored dark matter

Kılıç, Can; Klimek, Matthew D.; Yu, Jiang-Hao

doi:10.1103/physrevd.91.054036

Cited by 45 publications

(45 citation statements)

References 57 publications

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“…Different flavors carry the same charges under the SM gauge groups, but have different couplings to the Higgs, and so differ in their masses. One interesting possibility, which has been receiving increased attention, is that DM, like the SM matter fields, also comes in three flavors [1][2][3][4][5][6][7][8][9][10][11] or has flavor-specific couplings to the SM [12][13][14][15]. Specific…”

Section: Introductionmentioning

confidence: 99%

A couplet from flavored dark matter

Agrawal

Chacko

Kılıç

et al. 2015

J. High Energ. Phys.

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We show that a couplet, a pair of closely spaced photon lines, in the X-ray spectrum is a distinctive feature of lepton flavored dark matter models for which the mass spectrum is dictated by Minimal Flavor Violation. In such a scenario, mass splittings between different dark matter flavors are determined by Standard Model Yukawa couplings and can naturally be small, allowing all three flavors to be long-lived and contribute to the observed abundance. Then, in the presence of a tiny source of flavor violation, heavier dark matter flavors can decay via a dipole transition on cosmological timescales, giving rise to three photon lines. Two of these lines are closely spaced, and constitute the couplet. Provided the flavor violation is sufficiently small, the ratios of the line energies are determined in terms of the charged lepton masses, and constitute a prediction of this framework. For dark matter masses of order the weak scale, the couplet lies in the keV-MeV region, with a much weaker line in the eV-keV region. This scenario constitutes a potential explanation for the recent claim of the observation of a 3.5 keV line. The next generation of X-ray telescopes may have the necessary resolution to resolve the double line structure of such a couplet.

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Section: Introductionmentioning

confidence: 99%

A couplet from flavored dark matter

Agrawal

Chacko

Kılıç

et al. 2015

J. High Energ. Phys.

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“…The interesting possibility of DM, rather than the mediator, charged under the top flavor has been considered in Ref. [39]. More general simplified models with DM carrying flavor indices are explored in Refs.…”

Section: Top Portal Forbidden Wimpmentioning

confidence: 99%

Forbidden dark matter at the weak scale via the top portal

2017

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At the tail of its velocity distribution, cold dark matter (DM) can annihilate at finite temperature to states heavier than itself. We explore the possibility that DM freezeout is dictated by these "forbidden annihilations" at the electroweak scale. Demanding that annihilation products be Standard Model particles, we find that for the forbidden mechanism to primarily set the DM relic abundance, DM must couple predominantly, if not solely, to top quarks. This can be arranged by invoking a non-trivial flavor structure such as Minimal Flavor Violation. We avail two avenues to achieve the correct thermal cross-section, requiring a mediator exchanged in the s-or t-channel. These simplified models submit easily to direct detection and collider searches, and necessarily hide from indirect detection signals. Viable supersymmetric spectra involving the forbidden mechanism may be found if combined with co-annihilation.

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“…Similar setup has been proposed, motivated by the DM physics and the LHC physics [4][5][6][7][8][9][10].…”

Section: Setupmentioning

confidence: 99%

“…This kind of model would be one of the best candidates for the BSM, because many observables are not changed drastically from the SM predictions in this model [4][5][6][7][8][9][10]. Besides, it is also interesting that such a simple model can be tested not only in dark matter physics and the LHC experiments but also in flavor physics.…”

Section: Jhep03(2017)058mentioning

confidence: 99%

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Dark matter physics, flavor physics and LHC constraints in the dark matter model with a bottom partner

Abe

Kawamura

Okawa

et al. 2017

J. High Energ. Phys.

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In the scenario that dark matter (DM) is a weakly interacting massive particle, there are many possibilities of the interactions with the Standard Model (SM) particles to achieve the relic density of DM. In this paper, we consider a simple DM model where the DM candidate is a complex scalar boson. The model contains a new complex gauge singlet scalar boson and a new fermion whose gauge charge is the same as the right-handed down-type quark. We dub the new fermion the bottom partner. These new particles have Yukawa interactions with the SM down-type quarks. The DM candidate interacts with the SM particles through the Yukawa interactions. The Yukawa interactions are not only relevant to the annihilation process of the DM but also contribute to the flavor physics, such as the ∆F = 2 processes. In addition, the flavor alignment of the Yukawa couplings is related to the decay modes of the bottom partner, and thus we can find the explicit correlations among the physical observables in DM physics, flavor physics, and the signals at the LHC. We survey the ∆F = 2 processes based on the numerical analyses of the thermal relic density, the direct detection of the DM, and the current LHC bounds. We investigate the perturbative bound on the Yukawa coupling as well. A Study of a fermionic DM model with extra scalar quarks is also given for comparison.

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Signatures of top flavored dark matter

Cited by 45 publications

References 57 publications

A couplet from flavored dark matter

A couplet from flavored dark matter

Forbidden dark matter at the weak scale via the top portal

Dark matter physics, flavor physics and LHC constraints in the dark matter model with a bottom partner

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