Publications (106)
(Non-)thermal production of WIMPs during kination
Luca Visinelli
Understanding the nature of the Dark Matter (DM) is one of the current challenges in modern astrophysics and cosmology. Knowing the properties of the DM particle would shed light o…
Future targets for light gauge bosons from cosmic strings
Hanyu Cheng, Luca Visinelli
Cosmic strings, theoretical one-dimensional topological defects from the early universe, provide a valuable opportunity for exploring dark matter (DM) production and gravitational…
Natural Warm Inflation
Luca Visinelli
We derive the requirements that a generic axion-like field has to satisfy in order to play the role of the inflaton field in the warm inflation scenario. Compared to the parameter…
Neutrino Oscillations and Decoherence
Luca Visinelli, Paolo Gondolo
We present an expression for the transition probability between Dirac or Majorana neutrino flavors obtained from first principles within quantum field theory. Our derivation is bas…
Ultralight Black Holes as Sources of High-Energy Particles
Michael Zantedeschi, Luca Visinelli
The \textit{memory burden} effect, the idea that the amount of information stored within a system contributes to its stabilization, is particularly relevant for systems with a larg…
Cosmology Intertwined II: The Hubble Constant Tension
Eleonora Di Valentino, Luis A. Anchordoqui, Ozgur Akarsu +90
The current cosmological probes have provided a fantastic confirmation of the standard Cold Dark Matter cosmological model, that has been constrained with unprecedented accura…
Concerns regarding the use of black hole shadows as standard rulers
Sunny Vagnozzi, Cosimo Bambi, Luca Visinelli
Recently, Tsupko et al. have put forward the very interesting proposal to use the shadows of high-redshift supermassive black holes (SMBHs) as standard rulers. This would in princi…
Cosmological perturbations for an inflaton field coupled to radiation
Luca Visinelli
Within the framework of the interacting fluid formalism, we provide the numerical solution to the Boltzmann equation describing the evolution of an inflaton field coupled to radiat…
Indirect detection of the QCD axion
Luca Visinelli, Bradley Johnson, Bradley J. Kavanagh +3
The QCD axion, originally proposed to solve the strong CP problem in QCD, is a prominent candidate for dark matter (DM). In the presence of strong magnetic fields, such as those ar…
Stability and pulsation of the first dark stars
Tanja Rindler-Daller, Katherine Freese, Richard H. D. Townsend +1
The first bright objects to form in the Universe might not have been "ordinary" fusion-powered stars, but "Dark Stars" (DSs) powered by the annihilation of dark matter (DM) in the…
Kinetic decoupling of WIMPs: analytic expressions
Luca Visinelli, Paolo Gondolo
We present a general expression for the values of the average kinetic energy and of the temperature of kinetic decoupling of a WIMP, valid for any cosmological model. We show an ex…
Dilute and dense axion stars
Luca Visinelli, Sebastian Baum, Javier Redondo +2
Axion stars are hypothetical objects formed of axions, obtained as localized and coherently oscillating solutions to their classical equation of motion. Depending on the value of t…
Do neutrinos bend? Consequences of an ultralight gauge field as dark matter
Luca Visinelli, Tsutomu T. Yanagida, Michael Zantedeschi
An ultralight gauge boson could address the missing cosmic dark matter, with its transverse modes contributing to a relevant component of the galactic halo today. We show that, in…
Cosmic Birefringence and Electroweak Axion Dark Energy
Gongjun Choi, Weikang Lin, Luca Visinelli +1
Taking the recently reported non-zero rotation angle of the cosmic microwave background (CMB) linear polarization as the hint for a pseudo Nambu-Goldsto…
Global detector network to search for high-frequency gravitational waves (GravNet): conceptual design
Dorian Amaral, Diego Blas, Yuliia Borysenkova +30
We propose GravNet (Global detector network to search for high-frequency gravitational waves), a novel experimental scheme enabling the search for gravitational waves in the MHz to…
Late time transitions in the quintessence field and the tension
Eleonora Di Valentino, Ricardo Z. Ferreira, Luca Visinelli +1
We consider a quintessence field which transitions from a matter-like to a cosmological constant behavior between recombination and the present time. We aim at easing the tension i…
Hunting for extra dimensions in the shadow of M87*
Sunny Vagnozzi, Luca Visinelli
The Event Horizon Telescope has recently provided the first image of the dark shadow around the supermassive black hole M87*. The observation of a highly circular shadow provides s…
The CosmoVerse White Paper: Addressing observational tensions in cosmology with systematics and fundamental physics
Eleonora Di Valentino, Jackson Levi Said, Adam Riess +533
The standard model of cosmology has provided a good phenomenological description of a wide range of observations both at astrophysical and cosmological scales for several decades.…
Cosmology Intertwined I: Perspectives for the Next Decade
Eleonora Di Valentino, Luis A. Anchordoqui, Ozgur Akarsu +89
The standard Cold Dark Matter cosmological model provides an amazing description of a wide range of astrophysical and astronomical data. However, there are a few big open ques…
The Higgs Boson can delay Reheating after Inflation
Katherine Freese, Evangelos I. Sfakianakis, Patrick Stengel +1
The Standard Model Higgs boson, which has previously been shown to develop an effective vacuum expectation value during inflation, can give rise to large particle masses during inf…
Light axion-like dark matter must be present during inflation
Luca Visinelli
Axion-like particles (ALPs) might constitute the totality of the cold dark matter (CDM) observed. The parameter space of ALPs depends on the mass of the particle and on the ene…
The landscape of QCD axion models
Luca Di Luzio, Maurizio Giannotti, Enrico Nardi +1
We review the landscape of QCD axion models. Theoretical constructions that extend the window for the axion mass and couplings beyond conventional regions are highlighted and class…
Cavity Detection of Gravitational Waves: Where Do We Stand?
Claudio Gatti, Luca Visinelli, Michael Zantedeschi
High frequency gravitational waves (HFGWs) are predicted in various exotic scenarios involving both cosmological and astrophysical sources. These elusive signals have recently spar…
Atomic Quantum Sensors for High-Frequency Gravitational Wave Searches
Yi-fu Cai, Luca Visinelli, Sheng-Feng Yan
High-frequency gravitational waves (GWs), spanning frequencies from the microwave to the optical band, remain experimentally unexplored despite strong motivation from early-Univers…
Solar chameleons: Novel channels
Tomás O'Shea, Anne-Christine Davis, Maurizio Giannotti +3
We revisit the flux of chameleons (light scalar particles which could play a role in the dark energy phenomenon) produced in the interior of the Sun. Our novel analysis incorporate…
Large Density Perturbations from Reheating to Standard Model particles due to the Dynamics of the Higgs Boson during Inflation
Aliki Litsa, Katherine Freese, Evangelos I. Sfakianakis +2
Cosmic Microwave Background (CMB) observations are used to constrain reheating to Standard Model (SM) particles after a period of inflation. As a light spectator field, the SM Higg…
Cosmological window onto the string axiverse and the supersymmetry breaking scale
Luca Visinelli, Sunny Vagnozzi
In the simplest picture, the masses of string axions populating the axiverse depend on two parameters: the supersymmetry breaking scale and the action of the str…
Superradiance evolution of black hole shadows revisited
Rittick Roy, Sunny Vagnozzi, Luca Visinelli
Black hole (BH) shadows can be used to probe new physics in the form of ultra-light particles via the phenomenon of superradiant instability. By directly affecting the BH mass and…
The QCD Axion and Gravitational Waves in light of NANOGrav results
Nicklas Ramberg, Luca Visinelli
The North American Nanohertz Observatory for Gravitational Waves (NANOGrav) collaboration has recently reported strong evidence for a stochastic process affecting the 12.5 yr datas…
Horizon-scale tests of gravity theories and fundamental physics from the Event Horizon Telescope image of Sagittarius A
Sunny Vagnozzi, Rittick Roy, Yu-Dai Tsai +12
Horizon-scale images of black holes (BHs) and their shadows have opened an unprecedented window onto tests of gravity and fundamental physics in the strong-field regime. We conside…
Testing the dark origin of neutrino masses with oscillation experiments
Andrew Cheek, Luca Visinelli, Hong-Yi Zhang
The origin of neutrino masses remains unknown to date. One popular idea involves interactions between neutrinos and ultralight dark matter, described as fields or particles with ma…
Axions in Andromeda: Searching for Minicluster -- Neutron Star Encounters with the Green Bank Telescope
Liam Walters, Jordan Shroyer, Madeleine Edenton +5
The QCD axion and axion-like particles are compelling candidates for galactic dark matter. Theoretically, axions can convert into photons in the presence of a strong external magne…
Cosmology Intertwined: A Review of the Particle Physics, Astrophysics, and Cosmology Associated with the Cosmological Tensions and Anomalies
Elcio Abdalla, Guillermo Franco Abellán, Amin Aboubrahim +200
In this paper we will list a few important goals that need to be addressed in the next decade, also taking into account the current discordances between the different cosmological…
Constraining exotic high- reionization histories with Gaussian processes and the Cosmic Microwave Background
Hanyu Cheng, Ziwen Yin, Eleonora Di Valentino +2
The large-angle polarization anisotropies in the Cosmic Microwave Background (CMB) arise from Thomson scattering of CMB photons off free electrons in the post-recombination Univers…
Revisiting a negative cosmological constant from low-redshift data
Luca Visinelli, Sunny Vagnozzi, Ulf Danielsson
Persisting tensions between high-redshift and low-redshift cosmological observations suggest the dark energy sector of the Universe might be more complex than the positive cosmolog…
Condensation of Galactic Cold Dark Matter
Luca Visinelli
We consider the steady-state regime describing the density profile of a dark matter halo, if dark matter is treated as a Bose-Einstein condensate. We first solve the fluid equation…
Note on fundamental physics tests from black hole imaging: Comment on "Hunting for extra dimensions in the shadow of Sagittarius A"
Sunny Vagnozzi, Luca Visinelli
Several works over the past years have discussed the possibility of testing fundamental physics using Very Long Baseline Interferometry horizon-scale black hole (BH) images, such a…
Axions in Cold Dark Matter and Inflation Models
Luca Visinelli
The subjects of this thesis are the invisible axion and the more general family of axion-like particles. The invisible axion is a hypothetical elementary particle and a cold dark m…
Stellar Disruption of Axion Miniclusters in the Milky Way
Bradley J. Kavanagh, Thomas D. P. Edwards, Luca Visinelli +1
Axion miniclusters are dense bound structures of dark matter axions that are predicted to form in the post-inflationary Peccei-Quinn symmetry breaking scenario. Although dense, min…
Pressure Parametrization of Dark Energy: First and Second-Order Constraints with Latest Cosmological Data
Hanyu Cheng, Eleonora Di Valentino, Luis A. Escamilla +2
We explore an extension of the CDM model in which the pressure of the dark energy (DE) fluid evolves with the expansion of the Universe, expressed as a function of the scal…
Compatibility of JWST results with exotic halos
Fabio Iocco, Luca Visinelli
The James Webb Space Telescope (JWST) is unveiling astounding results about the first few hundred million years of life of the Universe, delivering images of galaxies at very high…
Direct detection of dark energy: the XENON1T excess and future prospects
Sunny Vagnozzi, Luca Visinelli, Philippe Brax +2
We explore the prospects for direct detection of dark energy by current and upcoming terrestrial dark matter direct detection experiments. If dark energy is driven by a new light d…
Gravitational waves and neutrino oscillations in Chern-Simons axion gravity
Gaetano Lambiase, Leonardo Mastrototaro, Luca Visinelli
We investigate the modifications in the neutrino flavor oscillations under the influence of a stochastic gravitational wave background (SGWB), in a scenario in which General Relati…
Constraints on Stupendously Large Black Holes
Bernard Carr, Florian Kuhnel, Luca Visinelli
We consider the observational constraints on stupendously large black holes (SLABs) in the mass range . These have attracted little attention hitherto…
Axion Miniclusters in Modified Cosmological Histories
Luca Visinelli, Javier Redondo
If the symmetry breaking leading to the origin of the axion dark matter field occurs after the end of inflation and is never restored, then overdensities in the axion field collaps…
Neutrino flavor oscillations in a curved space-time
Luca Visinelli
Using a WKB approximation of the Dirac equation in a curved spacetime, we obtain the expression for the phase shift between two neutrino mass eigenstates in a generic gravitational…
Constraining the axiverse with reionization
Ziwen Yin, Hanyu Cheng, Eleonora Di Valentino +3
Axions that couple to electromagnetism are produced in the early Universe by, among other channels, freeze-in via the Primakoff process. For sufficiently large axion masses, the sa…
Axion dark matter from Higgs inflation with an intermediate
Tommi Tenkanen, Luca Visinelli
In order to accommodate the QCD axion as the dark matter (DM) in a model in which the Peccei-Quinn (PQ) symmetry is broken before the end of inflation, a relatively low scale of in…
Axions as Dark Matter, Dark Energy, and Dark Radiation
Luca Visinelli
Axions and axion-like particles are ubiquitous in extensions of the Standard Model and offer a unifying framework for addressing open problems in cosmology. Depending on their mass…
Impact of the cosmic neutrino background on black hole superradiance
Gaetano Lambiase, Tanmay Kumar Poddar, Luca Visinelli
We assess the effect of the Cosmic Neutrino Background (CB) on superradiant instabilities caused by an ultralight scalar field around spinning black holes (BHs). When the scala…
Superradiant evolution of the shadow and photon ring of Sgr A
Yifan Chen, Rittick Roy, Sunny Vagnozzi +1
Ultralight bosons can affect the dynamics of spinning black holes (BHs) via superradiant instability, which can lead to a time evolution of the supermassive BH shadow. We study pro…
Dark photon dark matter from flattened axion potentials
Hong-Yi Zhang, Paola Arias, Andrew Cheek +3
Dark photons can be resonantly produced in the early universe via their coupling to an oscillating axion field. However, this mechanism typically requires large axion--dark photon…
QCD Axion Kinetic Misalignment without Prejudice
Basabendu Barman, Nicolás Bernal, Nicklas Ramberg +1
The axion field, the angular direction of the complex scalar field associated with the spontaneous symmetry breaking of the Peccei-Quinn (PQ) symmetry, could have originated with i…
Astrophysical neutrino oscillations after pulsar timing array analyses
Gaetano Lambiase, Leonardo Mastrototaro, Luca Visinelli
The pattern of neutrino flavor oscillations could be altered by the influence of noisy perturbations such as those arising from a gravitational wave background (GWB). A stochastic…
Transient Radio Signatures from Neutron Star Encounters with QCD Axion Miniclusters
Thomas D. P. Edwards, Bradley J. Kavanagh, Luca Visinelli +1
The QCD axion is expected to form dense structures known as axion miniclusters if the Peccei-Quinn symmetry is broken after inflation. Miniclusters that have survived until today w…
An integral equation for distorted wave amplitudes
Luca Visinelli, Paolo Gondolo
We derive a new integral equation that allows the calculation of the scattering or annihilation amplitude of two particles subjected to two potentials when the corresponding amplit…
Dark Stars Powered by Self-Interacting Dark Matter
Youjia Wu, Sebastian Baum, Katherine Freese +2
Dark matter annihilation might power the first luminous stars in the Universe. These types of stars, known as dark stars, could form in protohalos a…
Axion star condensation around primordial black holes and microlensing limits
Ziwen Yin, Luca Visinelli
We present novel findings concerning the parameter space of axion stars, extended object forming in dense dark matter environments through gravitational condensation. We emphasize…
The zoo plot meets the swampland: mutual (in)consistency of single-field inflation, string conjectures, and cosmological data
William H. Kinney, Sunny Vagnozzi, Luca Visinelli
We consider single-field inflation in light of string-motivated "swampland" conjectures suggesting that effective scalar field theories with a consistent UV completion must have fi…
Inflating without a flat potential: Viscous inflation
Luca Visinelli
Bulk viscosity leads to negative pressure, which is a key ingredient for successful inflation. We build an inflationary model where the slow-roll of the inflaton field is driven by…
Axion-Electromagnetic Waves
Luca Visinelli
We extend the duality symmetry between the electric and the magnetic fields to the case in which an additional axion-like term is present, and we derive the set of Maxwell's equati…
Novel cosmological bounds on thermally-produced axion-like particles
Luca Caloni, Martina Gerbino, Massimiliano Lattanzi +1
We constrain the coupling of thermally-produced axion-like particles (here axions) with photons and gluons, using data from the cosmic microwave background (CMB) spectra and baryon…
Axion cold dark matter revisited
Luca Visinelli, Paolo Gondolo
We study for what specific values of the theoretical parameters the axion can form the totality of cold dark matter. We examine the allowed axion parameter region in the light of r…
Probing the Early Universe with Axion Physics and Gravitational Waves
Nicklas Ramberg, Luca Visinelli
We show results for the expected reach of the network of experiments that is being set up globally with the aim of detecting the "invisible" axion, in light of a non-standard therm…
Boson Stars and Oscillatons: A Review
Luca Visinelli
Compact objects occupy a pivotal role in the exploration of Nature. The interest spans from the role of compact objects in astrophysics to their detection through various methods (…
Beyond thermal approximations: Precise cosmological bounds on Axion-Like Particles
Nicola Barbieri, Luca Caloni, Martina Gerbino +2
We derive updated cosmological bounds on light axion-like particles (ALPs) coupled to leptons or photons, using a full phase-space treatment of their production from the primordial…
Illuminating the dark universe in the multi-messenger era
Philippe Brax, Anne-Christine Davis, Md Riajul Haque +8
The precision era of multi-messenger astronomy, together with modern astrophysical, cosmological, and gravitational wave observations, increasingly points toward the existence of a…
Dark Matter Axions Revisited
Luca Visinelli, Paolo Gondolo
We study for what specific values of the theoretical parameters the axion can form the totality of cold dark matter. We examine the allowed axion parameter region in the light of r…
The Interplay between the Dark Matter Axion and Primordial Black Holes
Kratika Mazde, Luca Visinelli
If primordial black holes (PBHs) had come to dominate the energy density of the early Universe when oscillations in the axion field began, we show that the relic abundance and expe…
Testing the rotational nature of the supermassive object M87* from the circularity and size of its first image
Cosimo Bambi, Katherine Freese, Sunny Vagnozzi +1
The Event Horizon Telescope (EHT) collaboration has recently released the first image of a black hole (BH), opening a new window onto tests of general relativity in the strong fiel…
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…
Black Holes and WIMPs: All or Nothing or Something Else
Bernard Carr, Florian Kuhnel, Luca Visinelli
We consider constraints on primordial black holes (PBHs) in the mass range if the dark matter (DM) comprises weakly interacting massive par…
B-field induced mixing between Langmuir waves and axions
Luca Visinelli, Hugo Terças
We present an analytic study of the dispersion relation for an isotropic magnetized plasma interacting with axions. We provide a quantitative picture of the electromagnetic plasma…
Analytic expressions for the kinetic decoupling of WIMPs
Luca Visinelli
We present a general expression for the values of the average kinetic energy and of the temperature of kinetic decoupling of a WIMP, valid for any cosmological model. We show an ex…
WarmSPy: a numerical study of cosmological perturbations in warm inflation
Gabriele Montefalcone, Vikas Aragam, Luca Visinelli +1
We present WarmSPy, a numerical code in Python designed to solve for the perturbations' equations in warm inflation models and compute the corresponding scalar power spectrum at CM…
Observational Constraints on Warm Natural Inflation
Gabriele Montefalcone, Vikas Aragam, Luca Visinelli +1
Warm natural inflation is studied for the case of the original cosine potential. The radiation bath during inflation induces a dissipation (friction) rate in the equation of motion…
Testing Quintessence Axion Dark Energy with Recent Cosmological Results
Weikang Lin, Luca Visinelli, Tsutomu T. Yanagida
We investigate a quintessence axion model for dynamical dark energy, motivated in part by recent results from the Baryon Acoustic Oscillation (BAO) measurements of the Dark Energy…
Primordial Black Hole interpretation of the sub-solar merger event S251112cm
Md Riajul Haque, Fabio Iocco, Luca Visinelli
The LIGO-Virgo-KAGRA (LVK) candidate event S251112cm suggests the presence of at least one compact object with sub-solar masses. Since such objects cannot be produced through stand…
Axion search with telescope for radio astronomy (ASTRA): forecast for observations between 0.5 and 4~GHz
Utkarsh Bhura, David J. E. Marsh, Bradley R. Johnson +8
Axion dark matter (DM) is predicted to convert into radio waves in neutron star magnetospheres. We assess the detectability of this signal using a 5 m radio telescope to be install…
Do we have any hope of detecting scattering between dark energy and baryons through cosmology?
Sunny Vagnozzi, Luca Visinelli, Olga Mena +1
We consider the possibility that dark energy and baryons might scatter off each other. The type of interaction we consider leads to a pure momentum exchange, and does not affect th…
The future search for low-frequency axions and new physics with the FLASH resonant cavity experiment at Frascati National Laboratories
David Alesini, Danilo Babusci, Paolo Beltrame +25
We present a proposal for a new experiment, the FINUDA magnet for Light Axion SearcH (FLASH), a large resonant-cavity haloscope in a high static magnetic field which is planned to…
Have pulsar timing array methods detected a cosmological phase transition?
Andrea Addazi, Yi-Fu Cai, Antonino Marciano +1
We show that the recent detection of a gravitational wave (GW) background reported by various pulsar timing array (PTA) collaborations including NANOGrav-15yr, PPTA, EPTA, and CPTA…
Axion cold dark matter in non-standard cosmologies
Luca Visinelli, Paolo Gondolo
We study the parameter space of cold dark matter axions in two cosmological scenarios with non-standard thermal histories before Big Bang nucleosynthesis: the Low Temperature Rehea…
Dual Axion Electrodynamics
Luca Visinelli
The duality relation between the electric and magnetic fields, in the presence of an additional axion-like field, is considered. We derive the new equations that describe the elect…
Constraints on the scalar-field potential in warm inflation
Gabriele Montefalcone, Vikas Aragam, Luca Visinelli +1
We quantify the degree of fine tuning required to achieve an observationally viable period of inflation in the strongly dissipative regime of warm inflation. The ``fine-tuning'' pa…
Probing Solar Symmetrons with Direct Detection
Hannah Banks, Anne-Christine Davis, Luca Visinelli
We provide the first investigation of the solar production of symmetrons, a well-motivated class of screened scalar fields with density dependent couplings to the Standard Model, a…
Brane-world extra dimensions in light of GW170817
Luca Visinelli, Nadia Bolis, Sunny Vagnozzi
The search for extra dimensions is a challenging endeavor to probe physics beyond the Standard Model. The joint detection of gravitational waves (GW) and electromagnetic (EM) signa…
Microscopic primordial black holes as macroscopic dark matter from large extra dimensions
Giuseppe Filiberto Vitale, Gaetano Lambiase, Tanmay Kumar Poddar +1
We study the coupled cosmological evolution of primordial black holes (PBHs) and radiation in the Arkani-Hamed-Dimopoulos-Dvali (ADD) framework with large extra dimensions and…
Constraining the primordial black hole abundance through Big-Bang nucleosynthesis
Andrea Boccia, Fabio Iocco, Luca Visinelli
We investigate the scenario in which primordial black holes (PBHs) with masses Mpbh < 10^9 g undergo Hawking evaporation, around the Big-Bang nucleosynthesis (BBN) epoch. The evapo…
Cosmology Intertwined IV: The Age of the Universe and its Curvature
Eleonora Di Valentino, Luis A. Anchordoqui, Ozgur Akarsu +88
A precise measurement of the curvature of the Universe is of primeval importance for cosmology since it could not only confirm the paradigm of primordial inflation but also help in…
Novel constraints on fifth forces and ultralight dark sector with asteroidal data
Yu-Dai Tsai, Youjia Wu, Sunny Vagnozzi +1
We study for the first time the possibility of probing long-range fifth forces utilizing asteroid astrometric data, via the fifth force-induced orbital precession. We examine nine…
Primordial Black Hole Abundance from Reionization
Ziwen Yin, Hanyu Cheng, Luca Visinelli
We derive robust constraints on the initial abundance of evaporating primordial black holes (PBHs) using the reionization history of the Universe as a cosmological probe. We focus…
Observational Constraints on Monomial Warm Inflation
Luca Visinelli
Warm inflation is, as of today, one of the best motivated mechanisms for explaining an early inflationary period. In this paper, we derive and analyze the current bounds on warm in…
In the Realm of the Hubble tension a Review of Solutions
Eleonora Di Valentino, Olga Mena, Supriya Pan +6
The CDM model provides a good fit to a large span of cosmological data but harbors areas of phenomenology. With the improvement of the number and the accuracy of observations,…
Transient axion streams from disrupted miniclusters
Luca Visinelli, Momchil Naydenov
We investigate the formation and evolution of axion streams generated by the tidal disruption of axion miniclusters through stellar encounters in the Milky Way halo. Combining a la…
Fundamental Physics Opportunities with the Next-Generation Event Horizon Telescope
Dimitry Ayzenberg, Lindy Blackburn, Richard Brito +45
The Event Horizon Telescope (EHT) Collaboration recently published the first images of the supermassive black holes in the cores of the Messier 87 and Milky Way galaxies. These obs…
Neutrino astronomy as a probe of physics beyond the Standard Model: decay of sub-MeV - gauge boson dark matter
Weikang Lin, Luca Visinelli, Donglian Xu +1
The symmetry, the essential component in the seesaw mechanism and leptogenesis, is naturally equipped with a massive gauge boson. If this gauge boson is the…
Constraints on fifth forces and ultralight dark matter from OSIRIS-REx target asteroid Bennu
Yu-Dai Tsai, Davide Farnocchia, Marco Micheli +2
Using the OSIRIS-REx mission and ground-based tracking data for the asteroid Bennu, we derive new constraints on fifth forces and ultralight dark matter. The bounds we obtain are s…
Cosmology Intertwined III: and
Eleonora Di Valentino, Luis A. Anchordoqui, Ozgur Akarsu +89
The standard Cold Dark Matter cosmological model provides a wonderful fit to current cosmological data, but a few tensions and anomalies became statistically significant with…
Direct detection of solar chameleons with electron recoil data from XENONnT
Guan-Wen Yuan, Anne-Christine Davis, Maurizio Giannotti +3
We reassess prospects for direct detection of solar chameleons, in light of recent progress in modeling their production, and the availability of new XENONnT data. We show that the…