Determining the spin of light primordial black holes with Hawking radiation

Abstract

We propose a method to determine the mass and spin of primordial black holes (PBHs) in the mass range $5\times 10^7-10^{12}$ kg (Hawking temperatures $\sim 10$ MeV $-200$ GeV), based on measuring the energy of specific features in the photon Hawking emission spectrum, including both primary and secondary components. This is motivated by scenarios where PBHs in this mass range spin up as they evaporate, namely the string axiverse, where dimensionless spin parameters $\tilde{a}\sim 0.1-0.5$ can be achieved through the Hawking emission of hundreds or even thousands of light axion-like particles. Measuring the present PBH mass-spin distribution may thus be an important probe of physics beyond the Standard Model. Since the proposed method relies on the energy of the photons emitted by a given PBH, rather than on the associated flux, it is independent of the PBH-Earth distance and, as a byproduct, can also be used to infer the latter.

19 pages, 13 figures

References in corpus (15)

• Primordial Black Holes as Dark Matter: Recent Developments
• Constraints on Earth-mass primordial black holes from OGLE 5-year microlensing events
• Primordial black hole formation from an axion-like curvaton model
• Primordial black holes from inflaton and spectator field perturbations in a matter-dominated era
• Constraining primordial black holes as dark matter using the global 21-cm signal with X-ray heating and excess radio background
• Near future MeV telescopes can discover asteroid-mass primordial black hole dark matter
• Do Evaporating Black Holes Form Photospheres?
• Probing the Particle Spectrum of Nature with Evaporating Black Holes
• Gravity Waves and Primordial Black Holes in Scalar Warm Little Inflation
• Massive Argon Space Telescope (MAST): a concept of heavy time projection chamber for gamma-ray astronomy in the 100 MeV --- 1 TeV energy range
• Superradiance in the sky
• Evaporating Primordial Black Holes in Gamma Ray and Neutrino Telescopes
• Physics Beyond the Standard Model with BlackHawk v2.0
• Hawking radiation by spherically-symmetric static black holes for all spins: II -- Numerical emission rates, analytical limits and new constraints
• Sensitivities on non-spinning and spinning primordial black hole dark matter with global 21 cm troughs

Cited by in corpus (8)

• Primordial black hole constraints with Hawking radiation -- a review
• Primordial regular black holes as all the dark matter. II. Non-time-radial-symmetric and loop quantum gravity-inspired metrics
• Primordial regular black holes as all the dark matter. I. Time-radial-symmetric metrics
• Importance of being nonminimally coupled: Scalar Hawking radiation from regular black holes
• Identifying Spin Properties of Evaporating Black Holes through Asymmetric Neutrino and Photon Emission
• Machine Learning-Based Analytical Expressions for Gray-Body Factors and Application to Primordial Black Holes
• Immortality through the dark forces: Dark-charge primordial black holes as dark matter candidates
• Measuring black hole spin through gravitational lensing of pulsars