Dark atoms and composite dark matter

Cline, James M.

doi:10.21468/scipostphyslectnotes.52

Cited by 21 publications

(9 citation statements)

References 149 publications

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“…[44][45][46]), we would not obtain vertices with χ 1 γ D χ 1 interactions at tree-level since the dark photon gauge interaction terms in the Lagrangian would be off-diagonal with respect to the fermion states χ 1 , χ 2 . Rather, we expect these kinds of interactions to occur more prominently in models of composite inelastic dark matter [45,[47][48][49][50], where the mass splitting is generated either by the non-perturbative spectrum of composite states or mass differences between composite constituents. Indeed, another example of a theory with both diagonal and off-diagonal interactions between χ 1 , χ 2 is the spectrum of excited baryonic states in the Standard Model: the delta baryon ∆ + in the Standard Model, which as the spin-excited state of the proton, has both elastic and inelastic interactions with the Standard model photon in the baryonic sector.…”

Section: Multiple Cooling Channelsmentioning

confidence: 99%

The effect of multiple cooling channels on the formation of dark compact objects

Bramante,

Diamond,

Kim

2024

J. Cosmol. Astropart. Phys.

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A dissipative dark sector can result in the formation of compact objects with masses comparable to stars and planets. In this work, we investigate the formation of such compact objects from a subdominant inelastic dark matter model, and study the resulting distributions of these objects. In particular, we consider cooling from dark Bremsstrahlung and a rapid decay process that occurs after inelastic upscattering. Inelastic transitions introduce an additional radiative processes which can impact the formation of compact objects via multiple cooling channels. We find that having multiple cooling processes changes the mass and abundance of compact objects formed, as compared to a scenario with only one cooling channel. The resulting distribution of these astrophysical compact objects and their properties can be used to further constrain and differentiate between dark sectors.

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Section: Multiple Cooling Channelsmentioning

confidence: 99%

The effect of multiple cooling channels on the formation of dark compact objects

Bramante,

Diamond,

Kim

2024

J. Cosmol. Astropart. Phys.

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“…Below we review different DM candidates in such sectors and some intriguing dynamics that can happen therein, see Refs. [260,262,263] for recent reviews of such models.…”

Section: Modelsmentioning

confidence: 99%

TF08 Snowmass Report: BSM Model Building

Fox,

Kribs,

Murayama

et al. 2022

Preprint

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“…Besides, there are numerous portals of dark QCD to the standard model, see., e.g. [44]. For example, the quarks of the dark sector might be connected to the SM via a small "milli-" charge under SM hypercharge, or through a coupling to the SM Higgs.…”

Section: A Portals To the Standard Modelmentioning

confidence: 99%

Ultra-Light Pion (ULP) and Baryon WIMPzilla Dark Matter

Maleknejad¹,

McDonough²

2022

Preprint

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We consider a dark confining gauge theory with millicharged Ultra-Light Pions (ULP) and heavy baryons as dark matter candidates. The model simultaneously realizes the ultra-light (STronglyinteracting Ultralight Millicharged Particle or "STUMP") and superheavy ("WIMPzilla") dark matter paradigms, connected by the confinement scale of the dark QCD. It is a realization of millicharged ULDM, very unlike conventional axions, and exhibits a mass splitting between the charged and neutral pions. ULPs can easily provide the observed density of the dark matter, and be cosmologically stable, for a broad range of dark QCD scales and quark masses. The dark baryons, produced via gravitational particle production or via freeze-in, provide an additional contribution to the dark matter density. Dark matter halos and boson stars in this context are generically an admixture of the three pions and heavy baryons, leading to a diversity of density profiles. That opens up the accessible parameter space of the model compared with the standard millicharged DM scenarios and can be probed by future experiments. We briefly discuss additional interesting phenomenology, such as ULP electrodynamics, and Cosmic ULP Backgrounds. CONTENTS 8 4. Gravitational production 9 IV. ULP Halos and Boson Stars 9 V. Current Constraints and Avenues for Detection 11 VI. Discussion 12 A. Number density of heavy dark baryons 13 References 14

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Dark atoms and composite dark matter

Cited by 21 publications

References 149 publications

The effect of multiple cooling channels on the formation of dark compact objects

The effect of multiple cooling channels on the formation of dark compact objects

TF08 Snowmass Report: BSM Model Building

Ultra-Light Pion (ULP) and Baryon WIMPzilla Dark Matter

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