Future Constraints on Primordial Black Holes from XGIS-THESEUS

Ghosh, Diptimoy; Sachdeva, Divya; Singh, Praniti

doi:10.48550/arxiv.2110.03333

Cited by 4 publications

(20 citation statements)

References 64 publications

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“…where we have separated the PBH and the background contributions to the total photon count. An alternative Relative extremal variation in fPBH when using the same background as [19] or the central values of the data points compared to the background of [65] for the instruments of Fig. 3.…”

Section: B Prospective Instrumentsmentioning

confidence: 99%

“…In Table II, we show the extremal relative change in f PBH when choosing the same background as Ref. [19] and the agnostic background consisting of the central values of the data points (i.e. method M 1 2 ), as compared to the background of [10].…”

Section: B Prospective Instrumentsmentioning

confidence: 99%

“…[58]). Low energy photons principally come from the redshifted extragalactic spectrum while high energy photons originate from the galaxy [17][18][19].…”

Section: Hawking Radiation Constraints: Principle a Basic Formulasmentioning

confidence: 99%

“…During the last years, numerous constraints have been established on the PBH abundance in this disputed mass range [M min , M max ], with at stake the answer to the question of whether light PBHs are indeed the elusive DM. What we will henceforth call direct photon constraints are set by comparing the PBH emission spectrum to the galactic center (GC), or any other target, photon flux [9][10][11], to the stacked isotropic X-ray or gamma-ray backgrounds (denoted as EXGB) [12][13][14][15][16] or to a combination of the two [17][18][19]. There also exist direct photon (and neutrino) constraints on the local rate of PBH final burst as they reach the end of their evaporation, but this is specific to a fine-tuned PBH mass and thus we do not consider them here (see the very complete article [20]).…”

mentioning

confidence: 99%

“…Other studies are based on the direct [23] or indirect detection of electrons-positrons [22,[24][25][26][27][28][29][30][31][32][33][34][35][36][37]; and finally there are some papers that focus on neutrino constraints [25,[38][39][40]. Most of the more recent studies now take into account the effect of having a non-zero PBH spin, which enhances the photon emission and thus results in more stringent constraints for Kerr (rotating) PBHs [9,13,18,19,25,28,32,37,40], or an extended PBH mass distribution, that should be more realistic regarding the channels of PBH formation [13,15,16,18,24,25,29,32,40]. Exotic studies have also derived constraints on non-standard (other than Kerr) PBHs [41][42][43] or PBH-DM mixed scenarios [44][45][46][47].…”

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confidence: 99%

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Limits on primordial black holes detectability with Isatis: A BlackHawk tool

Auffinger

2022

Preprint

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Primordial black holes (PBHs) are convenient candidates to explain the elusive dark matter (DM). However, years of constraints from various astronomical observations have constrained their abundance over a wide range of masses, leaving only a narrow window open at 10 17 g M 10 22 g for all DM in the form of PBHs. We reexamine this disputed window with a critical eye, interrogating the general hypotheses underlying the direct photon constraints. We review 4 levels of assumptions: i) instrument characteristics, ii) prediction of the (extra)galactic photon flux, iii) statistical method of signal-to-data comparison and iv) computation of the Hawking radiation rate. Thanks to Isatis, a new tool designed for the public Hawking radiation code BlackHawk, we first revisit the existing and prospective constraints on the PBH abundance and investigate the impact of assumptions i)-iv). We show that the constraints can vary by several orders of magnitude, advocating the necessity of a reduction of the theoretical sources of uncertainties. Second, we consider an "ideal" instrument and we demonstrate that the PBH DM scenario can only be constrained by the direct photon Hawking radiation phenomenon below Mmax ∼ 10 20 g. The upper part of the mass window should therefore be closed by other means.

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Section: B Prospective Instrumentsmentioning

confidence: 99%

Section: B Prospective Instrumentsmentioning

confidence: 99%

“…[58]). Low energy photons principally come from the redshifted extragalactic spectrum while high energy photons originate from the galaxy [17][18][19].…”

Section: Hawking Radiation Constraints: Principle a Basic Formulasmentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

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Limits on primordial black holes detectability with Isatis: A BlackHawk tool

Auffinger

2022

Preprint

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Evaporating primordial black holes in gamma ray and neutrino telescopes

Capanema¹,

Esmaeili²,

Esmaili³

2021

J. Cosmol. Astropart. Phys.

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A primordial black hole in the last stages of evaporation and located in the local neighborhood can produce a detectable signal in gamma ray and neutrino telescopes. We re-evaluate the expected gamma ray and neutrino fluxes from these transient point events and discuss the consequences for existing constraints. For gamma rays we improve the current bounds by a factor of few, while for neutrinos we obtain significantly different results than the existing literature. The capability and advantages of neutrino telescopes in the search for primordial black holes is discussed thoroughly. The correlations of gamma ray and neutrino energy and time profiles will be promoted as a powerful tool in identifying the primordial black holes, in case of detection.

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Sensitivities on nonspinning and spinning primordial black hole dark matter with global 21-cm troughs

Saha

Laha

2022

Phys. Rev. D

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Detection of the global 21 cm signal arising from neutral hydrogen can revolutionize our understanding of the standard evolution of the Universe after recombination. In addition, it can also be an excellent probe of dark matter (DM). Among all the DM candidates, primordial black holes (PBHs) are one of the most well motivated. Hawking emission from low-mass PBHs can have a substantial effect on the thermal and ionization history of the early Universe, and that in turn can have an imprint on the global 21 cm signal. Recently EDGES has claimed a global 21 cm signal, though SARAS 3 has rejected that claim. In this work, we investigate the sensitivities on nonspinning and spinning PBHs arising from an EDGES-like measurement of the global 21 cm signal, and find that the sensitivities will be competitive with those arising from other astrophysical observables. We show that the sensitivities can be significantly strengthened depending on various uncertain astrophysical parameters. Besides, we also derive projections on the PBH density from the absorption trough expected during the Dark Ages. Our work shows that the near future unambiguous detection of the global 21 cm absorption troughs can be an excellent probe of PBH DM.

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Future Constraints on Primordial Black Holes from XGIS-THESEUS

Cited by 4 publications

References 64 publications

Limits on primordial black holes detectability with Isatis: A BlackHawk tool

Limits on primordial black holes detectability with Isatis: A BlackHawk tool

Evaporating primordial black holes in gamma ray and neutrino telescopes

Sensitivities on nonspinning and spinning primordial black hole dark matter with global 21-cm troughs

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