Results 11 to 20 of about 41,771 (184)
Journal of High Energy Physics, 2018 Conventional approaches to probing axions and axion-like particles (ALPs) typically rely on a coupling to photons. However, if this coupling is extremely weak, ALPs become invisible and are effectively decoupled from the Standard Model. Here we show that
Machado, Camila S. +3 more
core +3 more sources
Axion forces in axion backgrounds
Journal of High Energy PhysicsAxions can naturally be very light due to the protection of an (approximate) shift symmetry. Because of their pseudoscalar nature, the long-range force mediated by the axion at tree level is spin dependent, which cannot lead to observable effects between
Yuval Grossman, Bingrong Yu, Siyu Zhou
doaj +3 more sources
Journal of High Energy Physics, 2020 Abstract We investigate the production of axion quanta during the early universe evolution of an axion-like field rolling down a wiggly potential. We compute the growth of quantum fluctuations and their back-reaction on the homogeneous zero-mode.
Fonseca De Sa, Nayara +3 more
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Nuclear Physics B - Proceedings Supplements, 1992 The strong CP problem and its resolution through the existence of an axion are briefly reviewed. The constraints on the axion from accelerator searches, from the evolution of red giants and from supernova SN1987a combine to require $m_a < 3 \cdot 10^{-3}$ eV, where $m_a$ is the axion mass.
Department of Physics, University of Florida, Gainesville, FL 32611, USA ( host institution ) +1 more
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Physical Review Letters, 2018 We propose a class of axion models with generation dependent Peccei-Quinn charges for the known fermions that allow to suppress the axion couplings to nucleons and electrons. Astrophysical limits are thus relaxed, allowing for axion masses up to ${\cal O}(0.1)$ eV.
Di Luzio L. +4 more
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Axion quasiparticles for axion dark matter detection [PDF]
Journal of Cosmology and Astroparticle Physics, 2021 78 pages + appendices, v2: reference list extended, added one more case to fig ...
Schütte-Engel, J +9 more
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Proceedings of Corfu Summer Institute 2019 "School and Workshops on Elementary Particle Physics and Gravity" — PoS(CORFU2019), 2020 This proceeding is based on [1] where we study a model in which the SM is coupled to a Hidden sector via heavy messengers. In this framework, instanton densities of the Hidden sector behave in the IR like axions coupled to the SM. We study the general properties of such emergent axions and we show that they are different from both fundamental and ...
Anastasopoulos P. +4 more
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Journal of High Energy Physics, 2015 We discuss quantum gravitational effects in Einstein theory coupled to periodic axion scalars to analyze the viability of several proposals to achieve superplanckian axion periods (aka decay constants) and their possible application to large field inflation models.
Miguel Montero +2 more
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COSMO-97, 1998 The current cosmological constraints on a dark matter axion are reviewed. We describe the basic mechanisms by which axions are created in the early universe, both in the standard thermal scenario in which axion strings form and in inflationary models. In the thermal scenario, the dominant process for axion production is through the radiative decay of ...
Shellard, E. P. S., Battye, R. A.
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