LUX constraints on magnetic dark matter in a perturbative extension of the standard model with(out) naturality

Frandsen, Mads T.; Sannino, Francesco; Shoemaker, Ian M.; Svendsen, Ole

doi:10.1103/physrevd.89.055004

Cited by 12 publications

(21 citation statements)

References 50 publications

(67 reference statements)

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“…Unless we further extend the model χ would behave as a sterile light neutrino. If we allow the introduction of a small conformal breaking by intruding a hard mass term (or yet another scalar field acquiring a VEV) for χ then χ could be considered as a DM candidate [43]. We will not speculate further on this point and move to the next natural case in which also S can receive a non-vanishing VEV via the CW mechanism.…”

Section: Dark Aspectsmentioning

confidence: 99%

“…The original motivation for this model was to construct an UV completion of the effective magnetic moment dark matter model [61] able to alleviate, at the time, the tension between the results of different DM direct detection experiments. The model phenomenology, including the dark matter and collider aspects, has been further studied in [43,60]. The possibility to secure the SM vacuum stability in the SEχy model context has been studied in [62].…”

Section: Seχy Model: Sm + Complex Scalar + Fermionsmentioning

confidence: 99%

“…The DM phenomenology has been studied in [43,60]. However in [43] the value y χ = 2, motivated by the VCs, was used to constrain the model.…”

Section: Dark Aspects and Constraintsmentioning

confidence: 99%

“…However in [43] the value y χ = 2, motivated by the VCs, was used to constrain the model. Relaxing the VCs on y χ , as we shall see, will improve on the model phenomenological viability.…”

Section: Dark Aspects and Constraintsmentioning

confidence: 99%

“…There the particle χ was associated with dark matter, and it is was found, that the EWPT can be strongly first order and that the model can yield the correct DM density 8 . Here too χ can be associated with dark matter [43] and since the new fermion sector has a milder effect than the new boson one on the phase transition we expect a strong first order phase transition [40][41][42].…”

Section: Sm + Real Singlet Scalar + Weyl Fermion(s)mentioning

confidence: 99%

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First order electroweak phase transition from (non)conformal extensions of the standard model

Sannino

Virkajärvi

2015

Phys. Rev. D

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We analyse and compare the finite-temperature electroweak phase transition properties of classically (non)conformal extensions of the Standard Model. In the classically conformal scenarios the breaking of the electroweak symmetry is generated radiatively. The models feature new scalars coupled conformally to the Higgs sector as well as new fermions. We uncover the parameter space leading to a first-order phase transition with(out) the Veltman conditions. We also discuss dark (matter) aspects of some of the models and compare with existing literature when appropriate. We observe that to accommodate both, a first order electroweak phase transition, and a phenomenologically viable dark matter candidate requires to go beyond the simplest extensions of the Standard Model. Furthermore these extensions must all feature new degrees of freedom that are naturally lighter than a TeV and therefore the associated models are testable at the upcoming Large Hadron Collider run two experiments. * sannino@cp3-origins.net ¶ virkajarvi@cp3-origins.net arXiv:1505.05872v2 [hep-ph]

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Section: Dark Aspectsmentioning

confidence: 99%

Section: Seχy Model: Sm + Complex Scalar + Fermionsmentioning

confidence: 99%

“…The DM phenomenology has been studied in [43,60]. However in [43] the value y χ = 2, motivated by the VCs, was used to constrain the model.…”

Section: Dark Aspects and Constraintsmentioning

confidence: 99%

Section: Dark Aspects and Constraintsmentioning

confidence: 99%

Section: Sm + Real Singlet Scalar + Weyl Fermion(s)mentioning

confidence: 99%

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First order electroweak phase transition from (non)conformal extensions of the standard model

Sannino

Virkajärvi

2015

Phys. Rev. D

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The dark penguin shines light at colliders

Primulando

Salvioni

Tsai

2015

J. High Energ. Phys.

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Abstract:Collider experiments are one of the most promising ways to constrain Dark Matter (DM) interactions. For several types of DM-Standard Model couplings, a meaningful interpretation of the results requires to go beyond effective field theory, considering simplified models with light mediators. This is especially important in the case of loopmediated interactions. In this paper we perform the first simplified model study of the magnetic dipole interacting DM, by including the one-loop momentum-dependent form factors that mediate the coupling -given by the Dark Penguin -in collider processes. We compute bounds from the monojet, monophoton, and diphoton searches at the 8 and 14 TeV LHC, and compare the results to those of direct and indirect detection experiments. Future searches at the 100 TeV hadron collider and at the ILC are also addressed. We find that the optimal search strategy requires loose cuts on the missing transverse energy, to capture the enhancement of the form factors near the threshold for on-shell production of the mediators. We consider both minimal models and models where an additional state beyond the DM is accessible. In the latter case, under the assumption of anarchic flavor structure in the dark sector, the LHC monophoton and diphoton searches will be able to set much stronger bounds than in the minimal scenario. A determination of the mass of the heavier dark fermion might be feasible using the M T 2 variable. In addition, if the Dark Penguin flavor structure is almost aligned with that of the DM mass, a displaced signal from the decay of the heavier dark fermion into the DM and photon can be observed. This allows us to set constraints on the mixings and couplings of the model from an existing search for non-pointing photons.

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Natural X-ray lines from the low scale supersymmetry breaking

Kang

et al. 2015

Physics Letters B

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In the supersymmetric models with low scale supersymmetry (SUSY) breaking where the gravitino mass is around keV, we show that the 3.5 keV X-ray lines can be explained naturally through several different mechanisms: (I) a keV scale dark gaugino plays the role of sterile neutrino in the presence of bilinear R-parity violation. Because the light dark gaugino obtains Majorana mass only via gravity mediation, it is a decaying warm dark matter (DM) candidate; (II) the compressed cold DM states, whose mass degeneracy is broken by gravity mediated SUSY breaking, emit such a line via the heavier one decay into the lighter one plus photon(s). A highly supersymmetric dark sector may readily provide such kind of system; (III) the light axino, whose mass again is around the gravitino mass, decays to neutrino plus gamma in the R-parity violating SUSY. Moreover, we comment on dark radiation from dark gaugino.

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LUX constraints on magnetic dark matter in a perturbative extension of the standard model with(out) naturality

Cited by 12 publications

References 50 publications

First order electroweak phase transition from (non)conformal extensions of the standard model

First order electroweak phase transition from (non)conformal extensions of the standard model

The dark penguin shines light at colliders

Natural X-ray lines from the low scale supersymmetry breaking

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