Degenerate fermion dark matter from a broken 
<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>U</mml:mi><mml:mo mathvariant="bold" stretchy="false">(</mml:mo><mml:mn>1</mml:mn><mml:msub><mml:mo mathvariant="bold" stretchy="false">)</mml:mo><mml:mrow><mml:mi mathvariant="normal">B</mml:mi><mml:mtext>−</mml:mtext><mml:mi mathvariant="normal">L</mml:mi></mml:mrow></mml:msub></mml:math>
 gauge symmetry

Choi, Gongjun; Suzuki, Motoo; Yanagida, Tsutomu T.

doi:10.1103/physrevd.102.035022

Cited by 13 publications

(8 citation statements)

References 64 publications

(127 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Since DPDM considered in this subsection is of the thermal kind, the considered mass regime is m A ∈ (20keV, 1MeV) to be consistent with Lyman-α forest observation [31]. 6 Before we constrain the model based on the aforesaid conditions, we discuss the size of ξ and the required strength of y for A µ to explain the current DM density. As both φ and A µ are in the thermal bath until A µ becomes decoupled, the number density ratio between the two is equal to the ratio of degrees of freedom, i.e.…”

Section: With Dark Thermal Bathmentioning

confidence: 94%

Dark photon dark matter in the minimal B − L model

Choi

Yanagida

Yokozaki

2021

J. High Energ. Phys.

Self Cite

View full text Add to dashboard Cite

The extension of the Standard model (SM) with three heavy right handed neutrinos, a complex scalar and the gauged U(1)B−L symmetry (the minimal B − L model) is considered the most compelling minimal one: the presence and the out-of-equilibrium decay of the heavy right handed neutrinos can account for the small masses of the active neutrinos and the baryon asymmetry of the universe. A natural accompanying question concerns whether the minimal B − L model can naturally accommodate an interesting dark matter (DM) candidate. We study the possibility where the current DM population is explained by the gauge boson of U(1)B−L symmetry. We discuss how the minimal set-up originally aimed at the seesaw mechanism and the leptogenesis is connected to conditions making the gauge boson promoted to a DM candidate.

show abstract

Section: With Dark Thermal Bathmentioning

confidence: 94%

Dark photon dark matter in the minimal B − L model

Choi

Yanagida

Yokozaki

2021

J. High Energ. Phys.

Self Cite

View full text Add to dashboard Cite

show abstract

“…No production mechanism should be able to create a colder distribution function for DDM. In particular, the skewed momentum distribution scenarios of [41] and the scalar decay models of [40,68] should all satisfy this bound. Using Eq.…”

Section: B Structure Formation Constraints On Ddmmentioning

confidence: 99%

Assessing the Fornax globular cluster timing problem in different models of dark matter

et al. 2021

View full text Add to dashboard Cite

We investigate what the orbits of globular clusters (GCs) in the Fornax dwarf spheroidal (dSph) galaxy can teach us about dark matter (DM). This problem was recently studied for ultralight dark matter (ULDM). We consider two additional models: (i) fermionic degenerate dark matter (DDM), where Pauli blocking should be taken into account in the dynamical friction computation; and (ii) self-interacting dark matter (SIDM). We give a simple and direct Fokker-Planck derivation of dynamical friction, new in the case of DDM and reproducing previous results in the literature for ULDM and cold DM. ULDM, DDM and SIDM were considered in the past as leading to cores in dSphs, a feature that acts to suppress dynamical friction and prolong GC orbits. For DDM we derive a version of the cosmological free streaming limit that is independent of the DM production mechanism, finding that DDM cannot produce an appreciable core in Fornax without violating Lyα limits. If the Ly-α limit is discounted for some reason, then stellar kinematics data does allow a DDM core which could prolong GC orbits. For SIDM we find that significant prolongation of GC orbits could be obtained for values of the self-interaction cross section considered in previous works. In addition to reassessing the inspiral time using updated observational data, we give a new perspective on the so-called GC timing problem, demonstrating that for a cuspy cold DM profile dynamical friction predicts a z = 0 radial distribution for the innermost GCs that is independent of initial conditions. The observed orbits of Fornax GCs are consistent with this expectation with a mild apparent fine-tuning at the level of ∼ 25%.

show abstract

“…Since DPDM considered in this subsection is of the thermal kind, the considered mass regime is m A ∈ (20keV, 1MeV) to be consistent with Lyman-α forest observation [30]. 6 Before we constrain the model based on the aforesaid conditions, we discuss the size of ξ and the required strength of y for A µ to explain the current DM density. As both φ and A µ are in the thermal bath until A µ becomes decoupled, the number density ratio between the two is equal to the ratio of degrees of freedom, i.e.…”

Section: With Dark Thermal Bathmentioning

confidence: 94%

Dark Photon Dark Matter in the minimal $B-L$ Model

Choi,

Yanagida,

Yokozaki

2020

Preprint

Self Cite

View full text Add to dashboard Cite

The extension of the Standard model (SM) with three heavy right handed neutrinos, a complex scalar and the gauged U (1)B−L symmetry (the minimal B − L model) is considered the most compelling minimal one: the presence and the out-of-equilibrium decay of the heavy right handed neutrinos can account for the small masses of the active neutrinos and the baryon asymmetry of the universe. A natural accompanying question concerns whether the minimal B − L model can naturally accommodate an interesting dark matter (DM) candidate. We study the possibility where the current DM population is explained by the gauge boson of U (1)B−L symmetry. We discuss how the minimal set-up originally aimed at the seesaw mechanism and the leptogenesis is connected to conditions making the gauge boson promoted to a DM candidate.

show abstract

Degenerate fermion dark matter from a broken U(1)B−L gauge symmetry

Cited by 13 publications

References 64 publications

Dark photon dark matter in the minimal B − L model

Dark photon dark matter in the minimal B − L model

Assessing the Fornax globular cluster timing problem in different models of dark matter

Dark Photon Dark Matter in the minimal $B-L$ Model

Contact Info

Product

Resources

About