Zobrazeno 1 - 10
of 22 263
pro vyhledávání: '"Marsh M"'
We propose a new theory of dark matter based on axion physics and cosmological phase transitions. We show that theories in which a gauge coupling increases through a first-order phase transition naturally result in `axion relic pockets': regions of r
Externí odkaz:
http://arxiv.org/abs/2407.01676
Publikováno v:
Phys. Rev. D 110, 043019 (2024)
In this paper, we explore the phenomenology of massive Axion-Like Particles (ALPs) coupled to quarks and gluons, dubbed 'QCD ALPs', with an emphasis on the associated low-energy observables. ALPs coupled to gluons and quarks not only induce nuclear i
Externí odkaz:
http://arxiv.org/abs/2405.00153
Publikováno v:
Military Images, 2009 Jan 01. 30(4), 20-20.
Externí odkaz:
https://www.jstor.org/stable/44034660
Publikováno v:
JCAP07(2023)056
We investigate the characteristics of the gamma-ray signal following the decay of MeV-scale Axion-Like Particles (ALPs) coupled to photons which are produced in a Supernova (SN) explosion. This analysis is the first to include the production of heavi
Externí odkaz:
http://arxiv.org/abs/2304.01060
Publikováno v:
JCAP 03 (2024) 014
We show that theories of inflation with multiple, rapidly turning fields can generate large amounts of non-Gaussianity. We consider a general theory with two fields, an arbitrary field-space metric, and a potential that supports sustained, rapidly tu
Externí odkaz:
http://arxiv.org/abs/2303.14156
Autor:
Carenza, Pierluca, Marsh, M. C. David
Publikováno v:
JCAP04(2023)021
Axions and photons resonantly interconvert in regions where the plasma frequency approximately equals the axion mass. This process is directly analogous to an avoided level crossing in quantum mechanics, for which the celebrated Landau-Zener (LZ) for
Externí odkaz:
http://arxiv.org/abs/2302.02700
Autor:
Witte, Samuel J., Baum, Sebastian, Lawson, Matthew, Marsh, M. C. David, Millar, Alexander J., Salinas, Gustavo
Gravitationally bound clumps of dark matter axions in the form of 'miniclusters' or even denser 'axion stars' can generate strong radio signals through axion-photon conversion when encountering highly magnetised neutron star magnetospheres. We system
Externí odkaz:
http://arxiv.org/abs/2212.08079
Autor:
Sisk-Reynés, Júlia, Reynolds, Christopher S., Parker, Michael L., Matthews, James H., Marsh, M. C. David
Axion-Like Particles (ALPs) are well-motivated extensions of the Standard Model of Particle Physics and a generic prediction of some string theories. X-ray observations of bright Active Galactic Nuclei (AGN) hosted by rich clusters of galaxies are ex
Externí odkaz:
http://arxiv.org/abs/2211.05136
Autor:
Carenza, Pierluca, Marsh, M. C. David
The extraordinarily bright gamma-ray burst GRB 221009A was observed by a large number of observatories, from radio frequencies to gamma-rays. Of particular interest are the reported observations of photon-like air showers of very high energy: an 18 T
Externí odkaz:
http://arxiv.org/abs/2211.02010
Autor:
Carenza, Pierluca, Sharma, Ramkishor, Marsh, M. C. David, Brandenburg, Axel, Ravensburg, Eike
Publikováno v:
Phys.Rev.D 108 (2023) 10, 103029
The interconversion of axionlike particles (ALPs) and photons in magnetised astrophysical environments provides a promising route to search for ALPs. The strongest limits to date on light ALPs use galaxy clusters as ALP-photon converters. However, su
Externí odkaz:
http://arxiv.org/abs/2208.04333