A warped scalar portal to fermionic dark matter

AbstractWe argue that extensions of the SM with a warped extra dimension, together with a new $${\mathbb {Z}}_2$$ Z 2 -odd scalar singlet, provide a natural explanation not only for the hierarchy problem but also for the nature of fermion bulk masses and the observed dark matter relic abundance. In particular, the Kaluza-Klein excitations of the new scalar particle, which is required to naturally obtain fermion bulk masses through Yukawa-like interactions, can be the leading portal to any fermion propagating into the bulk of the extra dimension and playing the role of dark matter. Moreover, such scalar excitations will necessarily mix with the Higgs boson, leading to modifications of the Higgs couplings and branching ratios, and allowing the Higgs to mediate the coannihilation of the fermionic dark matter. We study these effects and explore the viability of fermionic dark matter in the presence of these new heavy scalar mediators both in the usual freeze-out scenario and in the case where the freeze-out happens during an early period of matter domination.

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Gravitational wave signals of dark matter freeze-out

Journal of High Energy Physics ◽

10.1007/jhep02(2021)022 ◽

2021 ◽

Vol 2021 (2) ◽

Cited By ~ 3

Author(s):

Danny Marfatia ◽

Po-Yan Tseng

Keyword(s):

Phase Transition ◽

Dark Matter ◽

Gravitational Waves ◽

Order Phase Transition ◽

First Order ◽

Stochastic Background ◽

First Order Phase Transition ◽

Relic Abundance ◽

First Order Phase ◽

Freeze Out

Abstract We study the stochastic background of gravitational waves which accompany the sudden freeze-out of dark matter triggered by a cosmological first order phase transition that endows dark matter with mass. We consider models that produce the measured dark matter relic abundance via (1) bubble filtering, and (2) inflation and reheating, and show that gravitational waves from these mechanisms are detectable at future interferometers.

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ROLE OF EXTRA DIMENSION IN ACCELERATED EXPANSION

International Journal of Modern Physics A ◽

10.1142/s0217751x08039396 ◽

2008 ◽

Vol 23 (06) ◽

pp. 909-917 ◽

Cited By ~ 5

Author(s):

K. D. PUROHIT ◽

YOGESH BHATT

Keyword(s):

Cosmological Model ◽

Extra Dimension ◽

Accelerated Expansion ◽

Field Equations ◽

Four Dimensions ◽

Scale Factors ◽

Expansion Of The Universe ◽

The Universe ◽

Kaluza Klein

A five-dimensional FRW-type Kaluza–Klein cosmological model is taken to study the role of extra dimension in the expansion of the universe. Relation between scale factors corresponding to conventional four dimensions and the extra dimension has been established. Field equations are solved in order to find out the effect of pressure corresponding to these scale factors. Conditions for accelerated expansion are derived.

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Fat brane, dark matter and localized kinetic terms in six dimensions

The European Physical Journal C ◽

10.1140/epjc/s10052-020-7697-0 ◽

2020 ◽

Vol 80 (2) ◽

Cited By ~ 2

Author(s):

Ricardo G. Landim

Keyword(s):

Dark Matter ◽

Particle Physics ◽

Direct Detection ◽

Kinetic Term ◽

Finite Width ◽

Complex Scalar ◽

Abelian Gauge ◽

Complex Scalar Field ◽

Relic Abundance

Abstract Extra dimensions (ED) have been used as attempts to explain several phenomena in particle physics over the years. In this paper we investigate the role of an abelian gauge field as mediator of the interaction between dark matter (DM) and Standard Model (SM) particles, in a model with two flat and transverse ED compactified on the chiral square. DM is confined in a thin brane, localized at the origin of the chiral square, while the SM is localized in a finite width brane, lying in the opposite corner of the square. A brane-localized kinetic term is present in the DM brane, while in the fat brane it is not allowed. In this model the kinetic mixing is not required because we assume that the SM particles couple to the mediator through their $$B-L$$B-L charges, while DM couples to it via a dark charge. Assuming a complex scalar field as DM candidate it is possible to obtain the observed DM relic abundance and avoid direct detection constraints for some parameter choices.

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Relic abundance of dark matter in the minimal universal extra dimension model

Physical Review D ◽

10.1103/physrevd.74.023504 ◽

2006 ◽

Vol 74 (2) ◽

Cited By ~ 59

Author(s):

Mitsuru Kakizaki ◽

Shigeki Matsumoto ◽

Masato Senami

Keyword(s):

Dark Matter ◽

Extra Dimension ◽

Universal Extra Dimension ◽

Relic Abundance

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Relic abundance of dark matter in universal extra dimension models with right-handed neutrinos

10.1063/1.3131518 ◽

2009 ◽

Author(s):

Shigeki Matsumoto ◽

Joe Sato ◽

Masato Senami ◽

Masato Yamanaka ◽

Shaaban Khalil

Keyword(s):

Dark Matter ◽

Extra Dimension ◽

Universal Extra Dimension ◽

Relic Abundance

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CONSTRAINTS ON UED KK-NEUTRINO DARK MATTER FROM MAGNETIC DIPOLE MOMENTS

International Journal of Modern Physics D ◽

10.1142/s0218271807010985 ◽

2007 ◽

Vol 16 (10) ◽

pp. 1593-1600

Author(s):

THOMAS FLACKE ◽

DAVID W. MAYBURY

Keyword(s):

Dark Matter ◽

Magnetic Dipole ◽

Extra Dimension ◽

Dipole Moments ◽

Dark Matter Candidate ◽

Universal Extra Dimension ◽

The Standard Model ◽

Five Dimension ◽

The Stability ◽

Kaluza Klein

Generically, universal extra dimension (UED) extensions of the standard model predict the stability of the lightest Kaluza–Klein (KK) particle and hence provide a dark matter candidate. For UED scenarios with one extra dimension, we model-independently determine the size of the induced five-dimension magnetic dipole moment of the KK-neutrino, ν(1). We show that current observational bounds on the interactions of dipole dark matter place constraints on UED models with KK-neutrino dark matter.

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