177 citations · 1.4k across the 38 of their papers we have counts for
38 papers
The COSMIC WISPers White Paper: The physics case for Weakly Interacting Slim Particles
Ariel Arza, Deniz Aybas, Shyam Balaji +124
Axions and other very weakly interacting slim particles (WISPs), with masses below 1 GeV, arise naturally in many extensions of the Standard Model of particle physics. In particula…
Classical constant electric fields and the Schwinger effect in de Sitter
Mar Bastero-Gil, Paulo B. Ferraz, António Torres Manso +2
We study constant classical electric fields and the Schwinger effect in de Sitter space, with potential implications for magnetogenesis and inflationary dark matter production. Tre…
Schwinger Current in de Sitter Space
Mar Bastero-Gil, Paulo B. Ferraz, António Torres Manso +2
We study classical background electric fields and the Schwinger effect in de Sitter space. We show that having a constant electric field in de Sitter requires the photon to have a…
False Vacuum Decay Rate From Thin To Thick Walls
Marco Matteini, Miha Nemevšek, Yutaro Shoji +1
We consider a single real scalar field in flat spacetime with a polynomial potential up to , that has a local minimum, the false vacuum, and a deeper global minimum, the true…
Schwinger dark matter production
Mar Bastero-Gil, Paulo B. Ferraz, Lorenzo Ubaldi +1
Building on recently constructed inflationary vector dark matter production mechanisms as well as studies of magnetogenesis, we show that an inflationary dark Schwinger mechanism c…
Super heavy dark matter from inflationary Schwinger production
Mar Bastero-Gil, Paulo B. Ferraz, Lorenzo Ubaldi +1
We consider a simple setup with a dark sector containing dark electrons charged under an abelian gauge symmetry. We show that if the massless dark photon associated to the…
Analytic false-vacuum decay rate in the thin-wall approximation
Marco Matteini, Miha Nemevšek, Lorenzo Ubaldi
We present a fully analytical calculation of the false vacuum decay rate for a self-interacting scalar field in the thin-wall approximation. We obtain the bounce solution, together…
Analytic thin wall false vacuum decay rate
Aleksandar Ivanov, Marco Matteini, Miha Nemevšek +1
We derive a closed-form false vacuum decay rate at one loop in the thin wall limit, where the true and false vacua are nearly degenerate. We obtain the bounce configuration in …
Dark photon dark matter from a rolling inflaton
Mar Bastero-Gil, Jose Santiago, Lorenzo Ubaldi +1
We study in detail a recently proposed mechanism for producing non-thermal dark photon dark matter at the end of inflation in the mass range $μ\,{\rm eV} \lesssim m \lesssim 10\,{\…
Reheating-Induced Axion Dark Matter After Low Scale Inflation
Takeshi Kobayashi, Lorenzo Ubaldi
A kinetic mixing between the axion and the inflaton allows for a production of axion dark matter even if the inflationary Hubble scale is smaller than the zero-temperature axion ma…
Inflaxion Dark Matter
Takeshi Kobayashi, Lorenzo Ubaldi
A new mechanism for producing axion dark matter is proposed. By invoking low-scale inflation and a kinetic mixing between the axion and the inflaton, it is shown that the axion is…
Vector dark matter production at the end of inflation
Mar Bastero-Gil, Jose Santiago, Lorenzo Ubaldi +1
It has been shown that the longitudinal mode of a massive vector boson can be produced by inflationary fluctuations and account for the dark matter content of the Universe. In this…
The Supersymmetric R-Parity Violating Dine-Fischler-Srednicki-Zhitnitsky Axion Model
Stefano Colucci, Herbi K. Dreiner, Lorenzo Ubaldi
We propose a complete R-parity violating supersymmetric model with baryon triality that contains a Dine-Fischler-Srednicki-Zhitnitsky axion chiral superfield. We parametrize supers…
Combined explanations of B-physics anomalies: the sterile neutrino solution
Aleksandr Azatov, Daniele Barducci, Diptimoy Ghosh +2
In this paper we provide a combined explanation of charged- and neutral-current -physics anomalies assuming the presence of a light sterile neutrino which contributes to t…
Accretion of Dissipative Dark Matter onto Active Galactic Nuclei
Nadav Joseph Outmezguine, Oren Slone, Walter Tangarife +2
We examine the possibility that accretion of Dissipative Dark Matter (DDM) onto Active Galactic Nuclei (AGN) contributes to the growth rate of Super Massive Black Holes (SMBHs). Su…
Some Remarks on Anthropic Approaches to the Strong CP Problem
Michael Dine, Laurel Stephenson Haskins, Lorenzo Ubaldi +1
The peculiar value of is a challenge to the notion of an anthropic landscape. We briefly review the possibility that a suitable axion might arise from an anthropic requirement…
Dynamics of Relaxed Inflation
Walter Tangarife, Kohsaku Tobioka, Lorenzo Ubaldi +1
The cosmological relaxation of the electroweak scale has been proposed as a mechanism to address the hierarchy problem of the Standard Model. A field, the relaxion, rolls down its…
Relaxed Inflation
Walter Tangarife, Kohsaku Tobioka, Lorenzo Ubaldi +1
We present an effective model where the inflaton is a relaxion that scans the Higgs mass and sets it at the weak scale. The dynamics consist of a long epoch in which inflation is d…
Accidental Peccei-Quinn symmetry protected to arbitrary order
Luca Di Luzio, Enrico Nardi, Lorenzo Ubaldi
A gauge theory for a scalar multiplet transforming in the bi-fundamental representation preserves, for , an accidental symmetry…
"What's (the) Matter?", A Show on Elementary Particle Physics with 28 Demonstration Experiments
Herbi K. Dreiner, Max Becker, Mikolaj Borzyszkowski +26
We present the screenplay of a physics show on particle physics, by the Physikshow of Bonn University. The show is addressed at non-physicists aged 14+ and communicates basic conce…
Precision tools and models to narrow in on the 750 GeV diphoton resonance
Florian Staub, Peter Athron, Lorenzo Basso +8
The hints for a new resonance at 750 GeV from ATLAS and CMS have triggered a significant amount of attention. Since the simplest extensions of the standard model cannot accommodate…
Is the Relaxion an Axion?
Rick S. Gupta, Zohar Komargodski, Gilad Perez +1
We consider the recently proposed cosmological relaxation mechanism where the hierarchy problem is ameliorated, and the electroweak scale is dynamically selected by a slowly rollin…
Heavy concerns about the light axino explanation of the 3.5 keV X-ray line
Stefano Colucci, Herbi K. Dreiner, Florian Staub +1
An unidentified 3.5 keV line from X-ray observations of galaxy clusters has been reported recently. Although still under scrutiny, decaying dark matter could be responsible for thi…
Dynamical generation of the Peccei-Quinn scale in gauge mediation
Guido Festuccia, Toby Opferkuch, Lorenzo Ubaldi
The Peccei-Quinn (PQ) mechanism provides an elegant solution to the strong CP problem. However astrophysical constraints on axions require the PQ breaking scale to be far higher th…