Decay of ultralight axion condensates by Joshua Eby, Michael Ma, Peter Suranyi, L. C. R. Wijewardhana

“…Abstract Axion particles can form macroscopic condensates, whose size can be galactic in scale for models with very small axion masses m ∼ 10−22 eV, and which are sometimes referred to under the name of Fuzzy Dark Matter. …”
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The axion potential in quark matter by Ruggieri M., Castillo D.E.A., Grunfeld A.G., Zhang Bonan

“…We study the QCD axion potential in hot and dense quark matter, within an NJL-like model that includes the coupling of the axion to quarks. …”
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The QCD axion at finite density by Reuven Balkin, Javi Serra, Konstantin Springmann, Andreas Weiler

“…Abstract We show how the properties of the QCD axion change in systems at finite baryonic density, such as neutron stars. …”
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Dark matter in axion landscape by Ryuji Daido, Takeshi Kobayashi, Fuminobu Takahashi

“…If there are a plethora of axions in nature, they may have a complicated potential and create an axion landscape. …”
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Axion assisted Schwinger effect by Valerie Domcke, Yohei Ema, Kyohei Mukaida

“…Abstract We point out an enhancement of the pair production rate of charged fermions in a strong electric field in the presence of time dependent classical axion-like background field, which we call axion assisted Schwinger effect. …”
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Flavored axions and the flavor problem by Yithsbey Giraldo, R. Martinez, Eduardo Rojas, Juan C. Salazar

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Evidence for inflation in an axion landscape by Pran Nath, Maksim Piskunov

“…The axion landscape consisting of m axion pairs is assumed with the axions in each pair having opposite charges. …”
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Radiation Backreaction in Axion Electrodynamics by András Patkós

Subjects: “…axion electrodynamics…”
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More axions from strings by Marco Gorghetto, Edward Hardy, Giovanni Villadoro

“…We study the contribution to the QCD axion dark matter abundance that is produced by string defects during the so-called scaling regime. …”
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Thraxions: ultralight throat axions by Arthur Hebecker, Sascha Leonhardt, Jakob Moritz, Alexander Westphal

“…Abstract We argue that a new type of extremely light axion is generically present in the type IIB part of the string theory landscape. …”
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Conifold dynamics and axion monodromies by M. Scalisi, P. Soler, V. Van Hemelryck, T. Van Riet

“…In this note, we point out that the stability of the conifold modulus furthermore prevents large super-Planckian axion monodromy field ranges caused by brane-flux decay processes down warped throats. …”
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Deconfinement on axion domain walls by Mohamed M. Anber, Erich Poppitz

“…We show that the BCF anomaly is matched in the infrared by axion domain walls. We argue that ℤ N c 1 $$ {\mathrm{\mathbb{Z}}}_{N_c}^{(1)} $$ is spontaneously broken on axion domain walls, so that nonzero N -ality Wilson loops obey the perimeter law and probe quarks are deconfined on the walls. …”
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Axion-de Sitter wormholes by Sergio E. Aguilar-Gutierrez, Thomas Hertog, Rob Tielemans, Jan Pieter van der Schaar, Thomas Van Riet

Subjects: “…Axions and ALPs…”
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The monodromic axion-photon coupling by Prateek Agrawal, Arthur Platschorre

Subjects: “…Axions and ALPs…”
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Color unified dynamical axion by M. K. Gaillard, M. B. Gavela, R. Houtz, P. Quilez, R. del Rey

“…This extra source of axion mass respects automatically the alignment of the vacuum, ensuring a low-energy CP-conserving vacuum. …”
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Static axion stars revisited by Brandon Bautista, Juan Carlos Degollado

“…We consider static solutions to the spherically symmetric Einstein-scalar field systems with an axion potential known as axion stars, originally described by Guerra et al., JCAP (2019, 09 (09)). …”
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Dark Matter With Stückelberg Axions by Claudio Corianò, Paul H. Frampton, Nikos Irges, Alessandro Tatullo

Subjects: “…axion physics…”
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Cosmological aspects of the clockwork axion by Andrew J. Long

“…Abstract The clockwork axion refers to a family of aligned multi-axion models that lead to an exponential hierarchy between the scale of Peccei-Quinn symmetry breaking and the scale of the axion decay constant. …”
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Electroweak axion string and superconductivity by Yoshihiko Abe, Yu Hamada, Koichi Yoshioka

“…Abstract We study the axion strings with the electroweak gauge flux in the DFSZ axion model and show that these strings, called the electroweak axion strings, can exhibit superconductivity without fermionic zeromodes. …”
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Naturally astrophobic QCD axion by Marcin Badziak, Keisuke Harigaya

Subjects: “…Axions and ALPs…”
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