Cosmological signatures of superheavy dark matter

Li, Lingfeng; Lu, Shiyun; Wang, Yi; Zhou, Siyi

doi:10.1007/jhep07(2020)231

Cited by 36 publications

(10 citation statements)

References 103 publications

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“…This idea has been widely explored, e.g. [29,37,38,39,40,41,42] Here we explore this possibility in the present context, with particle production induced by the chiral anomaly (4.23).…”

Section: Inflationary Production Of Dark Mattermentioning

confidence: 97%

Chiral Symmetry and the Cosmological Constant

Alexander,

Herczeg,

Liu

et al. 2020

Preprint

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In this work we provide a link between a nearly vanishing cosmological constant and chiral symmetry. This is accomplished with a modification of General Relativity coupled to a topological field theory, namely BF theory by introducing fermions charged under the BF theory gauge group. We find that the cosmological constant sources a chiral anomaly for the fermions, providing a 'technical naturalness' explanation for the smallness of the observed cosmological constant. Applied to the early universe, we show that production of fermions during inflation can provide all the dark matter in the universe today, in the form of superheavy dark baryons.

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“…This idea has been widely explored, e.g. [29,37,38,39,40,41,42] Here we explore this possibility in the present context, with particle production induced by the chiral anomaly (4.23).…”

Section: Inflationary Production Of Dark Mattermentioning

confidence: 97%

Chiral Symmetry and the Cosmological Constant

Alexander,

Herczeg,

Liu

et al. 2020

Preprint

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“…Here a i = ±1 (i = 1, 2, 3) are in-in contour indices, and the momenta are as labeled in figure 4(a). D a i a j µ ν 's are gauge boson propagators, and we have written the external lines compactly in terms of mixed propagators [52], 23) in which G a is the bulk-to-boundary propagator of the inflaton fluctuation and D a± is the propagator for scalar σ. The integrals in (3.22) are difficult to be carried out directly, and we adopt several approximation to make progress.…”

Section: Jhep11(2020)082mentioning

confidence: 99%

Gauge boson signals at the cosmological collider

Wang

Xianyu

2020

J. High Energ. Phys.

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We study the production of massive gauge bosons during inflation from the axion-type coupling to the inflaton and the corresponding oscillatory features in the primordial non-Gaussianity. In a window in which both the gauge boson mass and the chemical potential are large, the signal is potentially reachable by near-future large scale structure probes. This scenario covers a new region in oscillation frequency which is not populated by previously known cosmological collider models. We also demonstrate how to properly include the exponential factor and discuss the subtleties in obtaining power dependence of the gauge boson mass in the signal estimate.

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“…We need only consider the mass of such DM candidates but introduce these objects in the context of Planck/GUT-scale particles produced non-thermally in the early universe i.e. WIMPZILLAs [39,40,[64][65][66][67][68][69][70][71][72][73][74], primordial black holes (PBHs) [75][76][77] and the Kerr relics of PBHs [10]. While these models can be made to interact with the SM through a new mediator, we note that the unscreened or fundamental charge carried by these objects is naturally small (or in the case of a global U(1) in PBHs, non-existent).…”

Section: Models and Relevant Parameter Spacementioning

confidence: 99%

Models of ultra-heavy dark matter visible to macroscopic mechanical sensing arrays

Blanco,

Elshimy,

Lang

et al. 2021

Preprint

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In recent years, the sensitivity of opto-mechanical force sensors has improved leading to increased interest in using these devices as particle detectors. In this study we consider scenarios where dark matter with mass close to the Planck scale may be probed by a large array of opto-mechanical accelerometers. We motivate a macroscopic mechanical search for ultra-heavy dark matter, exemplified by the efforts of the Windchime collaboration, by providing a survey of the model space that would be visible to such a search. We consider two classes of models, one that invokes a new long-range unscreened force and another that is only gravitationally interacting. We identify significant regions of well-motivated, potentially visible parameter space for versatile models such as Q-balls, composite dark matter, relics of gravitational singularities, and gravitationally produced ultra-heavy particles.

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Cosmological signatures of superheavy dark matter

Cited by 36 publications

References 103 publications

Chiral Symmetry and the Cosmological Constant

Chiral Symmetry and the Cosmological Constant

Gauge boson signals at the cosmological collider

Models of ultra-heavy dark matter visible to macroscopic mechanical sensing arrays

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