Observable signatures of dark photons from supernovae

DeRocco, William; Graham, Peter W.; Kasen, Daniel; Marques-Tavares, Gustavo; Rajendran, Surjeet

doi:10.1007/jhep02(2019)171

Cited by 76 publications

(91 citation statements)

References 35 publications

(50 reference statements)

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“…5 The relevant bounds on dark photon production from the SM sector reproduced in Fig. 4 are taken from [119,[124][125][126][127][128]. Bounds from a freeze-in production of V at T > 1 MeV derived in [121] are not applied, in accordance with our assumptions.…”

Section: B Energy Injection From Dark Particlesmentioning

confidence: 96%

“…The various labels summarize principal detection strategies, astrophysical constraints from stellar energy loss ("stellar") [119], and diffuse γ-ray background ("diffuse") [120], from cooling of the proto-neutron star of SN1987A ("SN") [124], from beam-dump and collider experiments; see e.g., [125,126] and references therein. Hatched regions show recent exclusions derived from gamma-ray signatures from SN [127] (blue) and energy-transfer argument inside SN [128] (pink). In addition, contours of mediator lifetime τ V equal to 1 sec (BBN), 10 13 sec (CMB), as well as t U (universe) are shown.…”

Section: B Energy Injection From Dark Particlesmentioning

confidence: 99%

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Self-interacting dark matter without prejudice

et al. 2020

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The existence of dark matter particles that carry phenomenologically relevant self-interaction cross sections mediated by light dark sector states is considered to be severely constrained through a combination of experimental and observational data. The conclusion is based on the assumption of specific dark matter production mechanisms such as thermal freeze-out together with an extrapolation of a standard cosmological history beyond the epoch of primordial nucleosynthesis. In this work, we drop these assumptions and examine the scenario from the perspective of the current firm knowledge we have results from direct and indirect dark matter searches and cosmological and astrophysical observations, without additional assumptions on dark matter genesis or the thermal state of the very early universe. We show that even in the minimal setup, where dark matter particles self-interact via a kinetically mixed vector mediator, a significant amount of parameter space remains allowed. Interestingly, however, these parameter regions imply a metastable, light mediator, which in turn calls for modified search strategies.

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Section: B Energy Injection From Dark Particlesmentioning

confidence: 96%

Section: B Energy Injection From Dark Particlesmentioning

confidence: 99%

Self-interacting dark matter without prejudice

et al. 2020

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“…The black dashed curve shows the bound determined by the PNS cooling argument for 18 M . Also shown is the excluded region inferred from the (non)observation of γ rays (dotted green curve), taken from Ref [38]…”

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confidence: 99%

New constraint from supernova explosions on light particles beyond the Standard Model

Sung

2019

Phys. Rev. D

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We propose a new constraint on light (sub-GeV) particles beyond the Standard Model that can be produced inside the proto-neutron star core resulting from the core-collapse supernova explosion. It is derived by demanding that the energy carried by exotic particles being transferred to the progenitor stellar envelopes must not exceed the explosion energy of < ∼ 2 · 10 51 erg of observed supernovae. We show specifically that for the case of a dark photon which kinetically mixes with the SM photon and decays predominantly to an e ± pair, a smaller mixing parameter of one order of magnitude below the well-established supernova cooling bound can be excluded. Furthermore, our bound fills the gap between the cooling bound and the region constrained by (non)observation of γ rays produced from supernovae for dark photons lighter than ∼ 20 MeV. Our result also rules out the possibility of aiding successful supernova explosions by transferring energy from the supernova core to the shock with exotic particles. *

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“…Understanding the possible signatures of Dark Complexity is therefore an important and timely challenge. There has been significant progress along these lines in recent years; for instance models of DM featuring additional interactions or a small number of states [7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25]. Although these approaches capture some of the possibilities of Dark Complexity, their relative simplicity still limits the range of phenomena that can be explored.…”

Section: Contentsmentioning

confidence: 99%

Signatures of mirror stars

Curtin

Setford

2020

J. High Energ. Phys.

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Motivated by theories of Neutral Naturalness, we argue that Mirror Stars are a generic possibility in any hidden sector with analogues of Standard Model (SM) electromagnetism and nuclear physics. We show that if there exists a tiny kinetic mixing between the dark photon and the SM photon, Mirror Stars capture SM matter from the interstellar medium, which accumulates in the core of the Mirror Star and radiates in the visible spectrum. This signature is similar to, but in most cases much fainter than, ordinary white dwarfs. We also show for the first time that in the presence of captured SM matter, a fraction of dark photons from the core of the Mirror Star convert directly to SM photons, which leads to an X-ray signal that represents a direct probe of the properties of the Mirror Star core. These two signatures together are a highly distinctive, smoking gun signature of Mirror Stars. We show that Mirror Stars could be discovered in both optical and X-ray searches up to approximately 100-1000 light years away, for a range of well-motivated values of the kinetic mixing parameter.

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Observable signatures of dark photons from supernovae

Cited by 76 publications

References 35 publications

Self-interacting dark matter without prejudice

Self-interacting dark matter without prejudice

New constraint from supernova explosions on light particles beyond the Standard Model

Signatures of mirror stars

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