Double-Disk Dark Matter

  title={Double-Disk Dark Matter},
  author={JiJi Fan and Andrey Katz and Lisa Randall and Matthew Reece},
  journal={Physics of the Dark Universe},
Dissipative dark matter explains rotation curves
Dissipative dark matter, where dark matter particles interact with a massless (or very light) boson, is studied. Such dark matter can arise in simple hidden sector gauge models, including those
Collapsed Dark Matter Structures.
It is shown that a simple model where dark matter is charged under a "dark electromagnetism" can allow dark matter to form gravitationally collapsed objects with characteristic mass scales much smaller than that of a Milky-Way-type galaxy.
We consider the cosmological consequences if a small fraction ( f ≲ 0.1 ?> ) of the dark matter is ultra-strongly self-interacting, with an elastic self-interaction cross section per unit mass &sgr;
Interacting dark sector and precision cosmology
We consider a recently proposed model in which dark matter interacts with a thermal background of dark radiation. Dark radiation consists of relativistic degrees of freedom which allow larger values
Make dark matter charged again
We revisit constraints on dark matter that is charged under a U(1) gauge group in the dark sector, decoupled from Standard Model forces. We find that the strongest constraints in the literature are
New Phenomenology from Asymmetric Dark Matter
The properties of dark matter — its microphysical form, and its cosmological origin and history — are one of the most important mysteries in fundamental physics. So far, evidence for matter beyond
Dark matter production after inflation and constraints
A multitude of evidence has accumulated in support of the existence of dark matter in our Universe. There are already plenty of dark matter candidates. However, we do not know yet whether any of
Solving the small-scale structure puzzles with dissipative dark matter
Small-scale structure is studied in the context of dissipative dark matter, arising for instance in models with a hidden unbroken Abelian sector, so that dark matter couples to a massless dark
Plasma dark matter direct detection
Dark matter in spiral galaxies like the Milky Way may take the form of a dark plasma. Hidden sector dark matter charged under an unbroken U(1)′ gauge interaction provides a simple and well defined


Dark matter and dark radiation
We explore the feasibility and astrophysical consequences of a new long-range U(1) gauge field ("dark electromagnetism") that couples only to dark matter, not to the Standard Model. The dark matter
The distribution of dark matter around galactic or cluster halos has usually been assumed to be approximately isothermal with a non-zero core radius, which is expected to be of the order of the size
Structure formation in multiple dark matter cosmologies with long-range scalar interactions
(Abridged) An interaction between Cold Dark Matter (CDM) and a classical scalar field playing the role of the cosmic dark energy (DE) might provide long-range dark interactions without conflicting
Cosmological simulations with self-interacting dark matter – II. Halo shapes versus observations
If dark matter has a large self-interaction scattering cross section, then interactions among dark-matter particles will drive galaxy and cluster halos to become spherical in their centers. Work in
Dynamical Dark Matter: I. Theoretical Overview
In this paper, we propose a new framework for dark-matter physics. Rather than focus on one or more stable dark-matter particles, we instead consider a multi-component framework in which the dark
Subhaloes in self-interacting galactic dark matter haloes
We present N-body simulations of a new class of self-interacting dark matter models, which do not violate any astrophysical constraints due to a non-power-law velocity dependence of the transfer
Multiple dark matter as a self‐regulating mechanism for dark sector interactions
A wide range of astrophysical and cosmological observations support the evidence that the energy density of the Universe is presently largely dominated by particles and fields that do not belong to
Evidence against dissipation-less dark matter from observations of galaxy haloes
THERE are two different types of missing (dark) matter: the unseen matter needed to explain the high rotation velocities of atomic hydrogen in the outer parts of spiral galaxies1,2, and the much
A Test of the Collisional Dark Matter Hypothesis from Cluster Lensing
Spergel & Steinhardt proposed the possibility that dark matter particles are self-interacting as a solution to two discrepancies between the predictions of cold dark matter models and observations:
Self-interacting dark matter
A new type of dark matter is considered. As with cold dark matter, when the dark matter is nonrelativistic, it does not couple to the electron-photon plasma, so its entropy per comoving volume is