Yuhsin Tsai

Echoes of self-interacting dark matter from binary black hole mergers

Anonymous, Jeong Han Kim, Jun Seung Pi, Yuhsin Tsai

Dark matter (DM) environments around black holes (BHs) can influence their mergers through dynamical friction, causing gravitational wave (GW) dephasing during the inspiral phase. While this effect is well studied for collisionless dark matter (CDM), it remains unexplored for self-interacting dark matter …

kr, us (code pays fourni par la source)

The sound of dark sectors in pulsar timing arrays

Yanou Cui, Yu-Dai Tsai, Yuhsin Tsai

kr, us (code pays fourni par la source)

Boiling After the Dust Settles: Constraining First-Order Phase Transitions During Dark Energy Domination

Anonymous, Yuhsin Tsai, Runqing Wang

A first-order phase transition could occur in the late Universe when vacuum energy begins dominating the energy density (z≲0.3) and convert some latent heat into other forms such as invisible radiation. This generic possibility also has concrete motivation in particle physics models, …

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Probing Confining Dark Sectors with Cosmological Perturbations

Daven Wei Ren Ho, Ameen Ismail, Yuhsin Tsai

Dark matter may emerge as a composite state of a dark sector which confines in a strongly first-order phase transition (PT). To avoid structure formation constraints on warm dark matter, the dark PT must occur above the keV scale. We investigate the …

Probing Confining Dark Sectors with Cosmological Perturbations

Daven Wei Ren Ho, Ameen Ismail, Yuhsin Tsai

Dark matter may emerge as a composite state of a dark sector which confines in a strongly first-order phase transition (PT). To avoid structure formation constraints on warm dark matter, the dark PT must occur above the keV scale. We investigate the …

us (code pays fourni par la source)

Probing New Degrees of Freedom with the Universal Tail of Primordial Black Hole Mass Functions

Kaustubh Agashe, Jae Hyeok Chang, Steven J. Clark, Bhaskar Dutta et autres

The primordial black hole (PBH) mass function today develops a low-mass evaporation tail whose shape is universal with respect to the initial PBH mass distribution. This universality is fixed by the continuity equation and the Hawking mass-loss rate, but the tail is …

Probing New Degrees of Freedom with the Universal Tail of Primordial Black Hole Mass Functions

Kaustubh Agashe, Jae Hyeok Chang, S E Clark, Bhaskar Dutta et autres

The primordial black hole (PBH) mass function today develops a low-mass evaporation tail whose shape is universal with respect to the initial PBH mass distribution. This universality is fixed by the continuity equation and the Hawking mass-loss rate, but the tail is …

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Searching for quirks at LHCb

Xabier Cid Vidal, M. Fernández Gómez, Matthew Low, Alejandro Novo Cal et autres

A bstract Quirks are heavy particles connected by a flux tube from a hidden confining force that remain weakly constrained in large regions of their parameter space. This flux tube acts as a string that, at short enough distance, stretches as the …

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Universal CMB B -mode spectrum from early causal tensor sources

Kylar Greene, Aurora Ireland, Gordan Krnjaic, Yuhsin Tsai

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Observable CMB B -modes from cosmological phase transitions

Kylar Greene, Aurora Ireland, Gordan Krnjaic, Yuhsin Tsai

A B-mode polarization signal in the cosmic microwave background (CMB) is widely regarded as smoking gun evidence for gravitational waves produced during inflation. Here, we demonstrate that tensor perturbations sourced during non-inflationary epochs can yield non-negligible B-mode signals, which can in principle …

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Cosmological and Astrophysical Constraints on Late First-Order Phase Transitions

Kylar Greene, Daven Wei Ren Ho, Soubhik Kumar, Yuhsin Tsai

First-order cosmological phase transitions (PT) can take place in a dark sector at relatively late times between the big-bang nucleosynthesis and recombination epochs. Because bubble nucleation is stochastic, the PT completes at different times in different regions of the Universe. This fluctuation …

Cosmological and Astrophysical Constraints on Late First-Order Phase Transitions

Kylar Greene, Daven Wei Ren Ho, Soubhik Kumar, Yuhsin Tsai

First-order cosmological phase transitions (PT) can take place in a dark sector at relatively late times between the big-bang nucleosynthesis and recombination epochs. Because bubble nucleation is stochastic, the PT completes at different times in different regions of the Universe. This fluctuation …