Zobrazeno 1 - 10
of 4 187
pro vyhledávání: '"Profumo A."'
Autor:
Roberts, M. Grant, Braff, Lila, Garg, Aarna, Profumo, Stefano, Jeltema, Tesla, O'Donnell, Jackson
Evidence for high-redshift supermassive black holes challenges standard scenarios for how such objects form in the early universe. Here, we entertain the possibility that a fraction of the cosmological dark matter could be ultra-strongly self interac
Externí odkaz:
http://arxiv.org/abs/2410.17480
Primordial black holes can be the entirety of the dark matter in a broad, approximately five-orders-of-magnitude-wide mass range, the ``asteroid mass range'', between $10^{-16}\ M_{\rm Sun}$ -- where constraints originate from evaporation -- and $10^
Externí odkaz:
http://arxiv.org/abs/2410.15400
On the Gravitational Wave Counterpart to a Gamma-ray Galactic Center Signal from Millisecond Pulsars
Autor:
Bartel, Kayla, Profumo, Stefano
The new tools of gravitational wave and multi-messenger astronomy allow for the study of astrophysical phenomenon in new ways and enables light to be shed on some of the longest-enduring mysteries of high-energy astrophysics. Among the latter stands
Externí odkaz:
http://arxiv.org/abs/2409.12271
Autor:
Ewasiuk, Christopher, Profumo, Stefano
A dark sector with a very large number of massive degrees of freedom is generically constrained by radiative corrections to Newton's constant. However, there are caveats to this statement, especially if the degrees of freedom are light or mass-less.
Externí odkaz:
http://arxiv.org/abs/2409.11359
We study the impact on the trajectory of high-energy cosmic-ray protons of scattering off the cosmic dark matter. We compute the scattering angle as a function of the cosmic-ray energy, of the dark matter mass, and of the interaction strength for a f
Externí odkaz:
http://arxiv.org/abs/2405.02755
Autor:
Munbodh, Pankaj, Profumo, Stefano
Publikováno v:
15 August 2024 issue of Physical Review D 110 (2024) 4, 043014
If the cosmological dark matter (DM) couples to Standard Model (SM) fields, it can decay promptly to SM states in a highly energetic hard process, which subsequently showers and hadronizes to give stable particles including $e^\pm$, $\gamma$, $p^{\pm
Externí odkaz:
http://arxiv.org/abs/2405.00798
Autor:
Profumo, Stefano
The fate of ultralight black holes depends on whether or not evaporation stops at or around the Planck scale. If evaporation stops, the general expectation is that a population of Planck-scale will be left over, possibly including a significant fract
Externí odkaz:
http://arxiv.org/abs/2405.00546
Autor:
Marichal, Henry, Passarella, Diego, Lucas, Christine, Profumo, Ludmila, Casaravilla, Verónica, Galli, María Noel Rocha, Ambite, Serrana, Randall, Gregory
The automatic detection of tree-ring boundaries and other anatomical features using image analysis has progressed substantially over the past decade with advances in machine learning and imagery technology, as well as increasing demands from the dend
Externí odkaz:
http://arxiv.org/abs/2404.10856
The tidal disruption of old, compact stellar structures provides strong constraints on macroscopic dark matter candidates such as primordial black holes. In view of recent, new observational data on the Eridanus II dwarf galaxy and on its central ste
Externí odkaz:
http://arxiv.org/abs/2403.19015
Autor:
Korwar, Mrunal, Profumo, Stefano
Black holes long-lived enough to be the dark matter have temperatures below the MeV. Since Hawking evaporation is a quasi-thermal process, no GeV emission is predicted to be produced by black holes if they are part, or all, of the cosmological dark m
Externí odkaz:
http://arxiv.org/abs/2403.18656