Feasibility of ultrarelativistic bubbles in SMEFT

Banerjee, Upalaparna; Chakraborty, Sabyasachi; Prakash, Suraj; Rahaman, Shakeel Ur

doi:10.1103/physrevd.110.055002

Cited by 3 publications

References 119 publications

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Populating secluded dark sector with ultra-relativistic bubbles

Azatov,

Nagels,

Vanvlasselaer

et al. 2024

J. High Energ. Phys.

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We study Dark Matter production during first order phase transitions from bubble-plasma collisions. We focus on scenarios where the Dark Matter sector is secluded and its interaction with the visible sector (including the Standard Model) originates from dimension-five and dimension-six operators. We find that such DM is generally heavy and has a large initial velocity, leading to the possibility of DM being warm today. We differentiate between the cases of weakly and strongly coupled dark sectors, where, in the latter case, we focus on glueball DM, which turns out to have very distinct phenomenological properties. We also systematically compute the Freeze-In production of the dark sector and compare it with the bubble-plasma DM abundances.

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Populating secluded dark sector with ultra-relativistic bubbles

Azatov,

Nagels,

Vanvlasselaer

et al. 2024

J. High Energ. Phys.

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The hydrodynamics of inverse phase transitions

Barni,

Blasi,

Vanvlasselaer

2024

J. Cosmol. Astropart. Phys.

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First order phase transitions are violent phenomena that occur when the state of the universe evolves abruptly from one vacuum to another. A direct phase transition connects a local vacuum to a deeper vacuum of the zero-temperature potential, and the energy difference between the two minima manifests itself in the acceleration of the bubble wall. In this sense, the transition is triggered by the release of vacuum energy. On the other hand, an inverse phase transition connects a deeper minimum of the zero-temperature potential to a higher one, and the bubble actually expands against the vacuum energy. The transition is then triggered purely by thermal corrections. We study for the first time the hydrodynamics and the energy budget of inverse phase transitions. We find several modes of expansion for inverse bubbles, which are related to the known ones for direct transitions by a mirror symmetry. We finally investigate the friction exerted on the bubble wall and comment on the possibility of runaway walls in inverse phase transitions.

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Populating Dark Sectors with Relativistic Bubble Walls

Vanvlasselaer

2024

Preprint

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In this talk, we present a mechanism of Dark Matter production during first order phase transitions and happening via the collision of the bubble wall and plasma quanta. We will first study the possibility that the dark matter is produced via a renormalisable operator. We will observe that in this context the DM can be much heavier than the scale of the phase transition and has a large initial velocity, leading to the possibility of the DM to be warm today. We will then turn to more realistic scenarios where the Dark Matter sector is secluded and its interaction with the visible sector (including the Standard Model) originates from dimension-five and dimension-six operators. In this regime, we also find that such DM is typically heavy and warm today. We study separately the cases of weakly and strongly coupled dark sectors, where, in the latter case, we focus on glueball DM, which turns out to have very distinct phenomenological properties. For completeness, we also systematically compute the Freeze-In production of the dark sector and compare it with the bubble-plasma DM abundances. All the analytical results are collected in a table presented in this paper.

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Feasibility of ultrarelativistic bubbles in SMEFT

Cited by 3 publications

References 119 publications

Populating secluded dark sector with ultra-relativistic bubbles

Populating secluded dark sector with ultra-relativistic bubbles

The hydrodynamics of inverse phase transitions

Populating Dark Sectors with Relativistic Bubble Walls

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