Nov 1, 2021 · Abstract: We revisit dark-matter production through freeze-in and freeze-out by solving the Boltzmann equations at the level of the phase-space distribution $f(p,t)$. Using the $2\to2$ annihilation and the $1\to2$ decay processes for illustration, we compare the resulting dark-matter relic abundance with that from the number-density approach.

May 22, 2020 · In the freeze-in recipe, the universe starts with little to no dark matter and it never reaches thermal equilibrium with the bath. The dashed (solid) colored lines are dark matter abundances in the freeze-in (out) scenarios.

Dec 3, 2018 · If you move towards the poles, above the tropic of cancer and Capricorn, these are icy places, characterized by extremely low temperatures. Some of these places drop below freezing point. Can you survive at such a place? If that’s too cold for you, then we also have places in this same world that are extremely hot. 120°c and above to be precise.

Apr 18, 2024 · I recently heard a clip of a professor saying that matter is frozen light. If this is the case, what force is strong enough to “freeze” light? Gravity? Dark matter? I’m intrigued. Thanks!

We aim to demonstrate that interactions within the dark sector can significantly modify the standard production of dark matter via the freeze-in mechanism, thereby affecting its experimental predictability.

We cross the hall from his sunny office into a dark room with an interconnected jumble of wires, small mirrors, vacuum tubes, laser sources and high-powered computer equipment.

In standard thermal freeze-out scenarios, dark matter is assumed to be a particle species in thermal equilibrium with the visible-sector thermal bath deep within the radiation dominated (RD) epoch, and then decouples first chemically and then kinetically from the thermal bath as the interaction rates fall below the Hubble expansion rate.

We investigate the influence of the reheating temperature of the visible sector on the freeze-in dark matter (DM) benchmark model for direct detection experiments, where DM production is mediated by an ultralight dark photon. Here, we consider a new regime for this benchmark: we take the initial temperature of the thermal Standard Model (SM ...

Mar 7, 2022 · The thermal freeze-out of dark matter annihilating into meta-stable dark partners sets the dark matter relic abundance while providing the out-of-equilibrium condition for baryogenesis.

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