Zobrazeno 1 - 10
of 58
pro vyhledávání: '"Schiappacasse, Enrico D."'
In the strong magnetic field of a neutron star's magnetosphere, axions coupled to electromagnetism develop a nonzero probability to convert into photons. Past studies have revealed that the axion-photon conversion can be resonantly enhanced. We recog
Externí odkaz:
http://arxiv.org/abs/2408.04551
The primordial black holes (PBHs) as all-dark matter (DM) hypothesis has recently been demotivated by the prediction that these objects would source an excessive rate of fast radio bursts (FRBs). However, these predictions were based on several simpl
Externí odkaz:
http://arxiv.org/abs/2312.09285
Publikováno v:
JCAP 05 (2023) 015
Wave-like dark matter made of spin-1 particles (dark photons) is expected to form ground state clumps called "vector solitons", which can have different polarizations. In this work, we consider the interaction of dark photons with photons, expressed
Externí odkaz:
http://arxiv.org/abs/2301.11470
Publikováno v:
Phys. Rev. D 107, 036013 (2023)
Observing physical effects of large quantum stress tensor fluctuations requires knowledge of the interactions between the probe and the particles of the underlying quantum fields. The quantum stress tensor operators must first be averaged in time alo
Externí odkaz:
http://arxiv.org/abs/2211.12001
Publikováno v:
JCAP 09 (2022) 072
The entropy production prior to BBN era is one of ways to prevent QCD axion with the decay constant $F_{a}\in[10^{12}{\rm GeV},10^{16}{\rm GeV}]$ from overclosing the universe when the misalignment angle is $\theta_{\rm i}=\mathcal{O}(1)$. As such, i
Externí odkaz:
http://arxiv.org/abs/2205.02255
Publikováno v:
Phys. Rev. D 104, 103020 (2021)
A non-negligible fraction of the QCD axion dark matter may form gravitationally bound Bose Einstein condensates, which are commonly known as axion stars or axion clumps. Such astrophysical objects have been recently proposed as the cause for the sing
Externí odkaz:
http://arxiv.org/abs/2109.13153
Publikováno v:
Phys. Rev. D 104, 123012 (2021)
A fraction of light scalar dark matter, especially axions, may organize into Bose-Einstein condensates, gravitationally bound clumps, "boson stars", and be present in large number in galactic halos today. We compute the expected number of gravitation
Externí odkaz:
http://arxiv.org/abs/2109.04283
Publikováno v:
Phys. Rev. D 104, 123033 (2021)
Primordial black holes (PBHs) are one of the most interesting nonparticle dark matter (DM) candidates. They may explain all the DM content in the Universe in the mass regime from about $10^{-14}M_{\odot}$ to $10^{-11}M_{\odot}$. We study PBHs as the
Externí odkaz:
http://arxiv.org/abs/2108.08717
Publikováno v:
Phys. Rev. D 103, 125014 (2021)
We extend previous work on the numerical diagonalization of quantum stress tensor operators in the Minkowski vacuum state, which considered operators averaged in a finite time interval, to operators averaged in a finite spacetime region. Since real e
Externí odkaz:
http://arxiv.org/abs/2104.04446
Publikováno v:
JCAP 09 (2021) 004
Probing the QCD axion dark matter (DM) hypothesis is extremely challenging as the axion interacts very weakly with Standard Model particles. We propose a new avenue to test the QCD axion DM via transient radio signatures coming from encounters betwee
Externí odkaz:
http://arxiv.org/abs/2102.05680