9 papers
WISPedia -- the WISPs Encyclopedia
Conrado Albertus, Francesca Chadha-Day, Arturo de Giorgi +8
The Weakly-Interacting Slim Particle encyclopedia (WISPedia) is a comprehensive reference work dedicated to the systematic compilation of theoretical models, Effective Field Theori…
Beyond thresholds: reconstructing UV physics from IR expansions
Hiromasa Takaura, Wen Yin
We show that ultraviolet information can be extracted from low-energy expansion coefficients, assuming analyticity and the absence of massless singularities. By reorganizing the lo…
Hubble-Scale Tachyonic Shocks from Low-Scale Inflation -- A New Gravitational-Wave Window on Inflation
Haruto Masubuchi, Yuma Narita, Wen Yin
Current bounds on the tensor-to-scalar ratio imply that the energy scale of inflation may lie below the grand-unified scale. In this paper, we show that in a broad class of single-…
Relativistic Axion with Nonrelativistic Momenta: A Robust Bound on Minimal ALP Dark Matter
Yuma Narita, Wen Yin
The axion-like particle (ALP), a pseudo Nambu-Goldstone boson that couples to two photons, has been studied extensively in recent years as a dark matter candidate. For initial fiel…
Superheavy dark matter from the natural inflation in light of the highest-energy astroparticle events
Kohta Murase, Yuma Narita, Wen Yin
Superheavy dark matter has been attractive as a candidate of particle dark matter. We propose a ``natural" particle model, in which the dark matter serves as the inflaton in natura…
Axion Cosmology with Multi-Branch Yang-Mills
Tsubasa Sugeno, Wen Yin
It is known that Yang-Mills theories, especially in the large- limit, exhibit a -vacuum structure with a multi-branched vacuum energy. In this work, we demonstrate that this…