401 citations · 3.5k across the 58 of their papers we have counts for
47 papers · 1 filter
Primordial Gravitational Waves from Scalar Backreaction in Axion-SU(2) Inflation
Mattia Cielo, Ema Dimastrogiovanni, Matteo Fasiello +1
In this work, we perform the first numerical study of strong scalar backreaction in spectator chromo-natural inflation (SCNI) in the case where the spectator sector decays during i…
Probing Cosmic Expansion and Early Universe with Einstein Telescope
Angelo Ricciardone, Mairi Sakellariadou, Archisman Ghosh +52
Over the next two decades, gravitational-wave (GW) observations are expected to evolve from a discovery-driven endeavour into a precision tool for astrophysics, cosmology, and fund…
On the prospects of thermalization of axion-SU(2) inflation
Sukannya Bhattacharya, Matteo Fasiello, Alexandros Papageorgiou +1
Axion inflation models coupled to a gauge sector via a Chern-Simons term exhibit an array of interesting phenomenology including a chiral gravitational wave spectrum and primordial…
Pure Chromo-Natural Inflation: Signatures of Particle Production from Weak to Strong Backreaction
Ema Dimastrogiovanni, Matteo Fasiello, Alexandros Papageorgiou +1
We consider, in the context of axion-inflation, the \textit{Pure Natural Inflation} (PNI) model coupled with an SU(2) gauge sector via a Chern-Simons term. As the axion rolls down…
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.…
Kinetic Gauge Friction in Natural Inflation
Martino Michelotti, Rodrigo Gonzalez Quaglia, Ema Dimastrogiovanni +2
We study an extension of the natural inflation model comprising a non-Abelian gauge sector coupled to the axion-inflaton kinetic term. We show how such non-minimal coupling serves…
A universal constraint on axion non-Abelian dynamics during inflation
Ema Dimastrogiovanni, Matteo Fasiello, Martino Michelotti +1
Inflationary models equipped with Chern-Simons coupling between their axion and gauge sectors exhibit an array of interesting signals including a testable chiral gravitational wave…
A novel PBH production mechanism from non-Abelian gauge fields during inflation
Ema Dimastrogiovanni, Matteo Fasiello, Alexandros Papageorgiou
We consider the case of axion-like particles (ALPs) during inflation. When coupled to a non-Abelian gauge sector via a Chern-Simons term, ALPs support an intriguing, testable, phen…
Enhancing Bispectrum Estimators for Galaxy Redshift Surveys with Velocities
Julius Wons, Emanuela Dimastrogiovanni, Matteo Fasiello +2
We forecast the ability of bispectrum estimators to constrain primordial non-Gaussianity using future photometric galaxy redshift surveys. A full-sky survey with photometric redshi…
Primordial Gravitational Waves in non-Minimally Coupled Chromo-Natural Inflation
Ema Dimastrogiovanni, Matteo Fasiello, Martino Michelotti +1
We consider inflation driven by an axion-like particle coupled to an SU(2) gauge sector via a Chern-Simons term. Known as chromo-natural inflation, this scenario is in tension with…
Enhancing gravitational wave anisotropies with peaked scalar sources
Ema Dimastrogiovanni, Matteo Fasiello, Ameek Malhotra +1
Gravitational wave (GW) backgrounds of cosmological origin are expected to be nearly isotropic, with small anisotropies resembling those of the cosmic microwave background. We anal…
Cosmology with the Laser Interferometer Space Antenna
Pierre Auclair, David Bacon, Tessa Baker +177
The Laser Interferometer Space Antenna (LISA) has two scientific objectives of cosmological focus: to probe the expansion rate of the universe, and to understand stochastic gravita…
Primordial Stochastic Gravitational Wave Background Anisotropies: in-in Formalization and Applications
Ema Dimastrogiovanni, Matteo Fasiello, Lucas Pinol
Primordial non-Gaussianities of the scalar(tensor)-tensor-tensor type supporting a non-trivial squeezed component are known to induce anisotropies in the stochastic gravitational w…
Probing Anisotropies of the Stochastic Gravitational Wave Background with LISA
Nicola Bartolo, Daniele Bertacca, Robert Caldwell +19
We investigate the sensitivity of the Laser Interferometer Space Antenna (LISA) to the anisotropies of the Stochastic Gravitational Wave Background (SGWB). We first discuss the mai…
Testing the Early Universe with Anisotropies of the Gravitational Wave Background
Ema Dimastrogiovanni, Matteo Fasiello, Ameek Malhotra +2
In this work we analyse in detail the possibility of using small and intermediate-scale gravitational wave anisotropies to constrain the inflationary particle content. First, we de…
Spinning Guest Fields during Inflation: Leftover Signatures
Emanuela Dimastrogiovanni, Matteo Fasiello, A. Emir Gumrukcuoglu
We consider the possibility of extra spinning particles during inflation, focussing on the spin-2 case. Our analysis relies on the well-known fully non-linear formulation of intera…
Cross-correlations as a Diagnostic Tool for Primordial Gravitational Waves
Ameek Malhotra, Ema Dimastrogiovanni, Matteo Fasiello +1
We explore and corroborate, by working out explicit examples, the effectiveness of cross-correlating stochastic gravitational wave background anisotropies with CMB temperature fluc…
Multimessenger Cosmology: correlating CMB and SGWB measurements
Peter Adshead, Niayesh Afshordi, Emanuela Dimastrogiovanni +3
Characterizing the physical properties of the stochastic gravitational waves background (SGWB) is a key step towards identifying the nature of its possible origin. We focus our ana…
Interferometer Constraints on the Inflationary Field Content
Laura Iacconi, Matteo Fasiello, Hooshyar Assadullahi +2
With an energy scale that can be as high as , inflation may provide a unique probe of high-energy physics. Both scalar and tensor fluctuations generated during…
New Horizons in Cosmology with Spectral Distortions of the Cosmic Microwave Background
J. Chluba, M. H. Abitbol, N. Aghanim +27
Voyage 2050 White Paper highlighting the unique science opportunities using spectral distortions of the cosmic microwave background (CMB). CMB spectral distortions probe many proce…
Microwave Spectro-Polarimetry of Matter and Radiation across Space and Time
Jacques Delabrouille, Maximilian H. Abitbol, Nabila Aghanim +77
This paper discusses the science case for a sensitive spectro-polarimetric survey of the microwave sky. Such a survey would provide a tomographic and dynamic census of the three-di…
Searching for Fossil Fields in the Gravity Sector
Emanuela Dimastrogiovanni, Matteo Fasiello, Gianmassimo Tasinato
Evidence for the presence of extra fields during inflation may be found in the anisotropies of the scalar and tensor spectra across a vast range of scales. Indeed, beyond the singl…
Spectral Distortions of the CMB as a Probe of Inflation, Recombination, Structure Formation and Particle Physics
J. Chluba, A. Kogut, S. P. Patil +98
Following the pioneering observations with COBE in the early 1990s, studies of the cosmic microwave background (CMB) have focused on temperature and polarization anisotropies. CMB…
Tensor non-Gaussianities from Non-minimal Coupling to the Inflaton
Emanuela Dimastrogiovanni, Matteo Fasiello, Gianmassimo Tasinato +1
Tensor non-Gaussianity represents an important future probe of the physics of inflation. Inspired by recent works, we elaborate further on the possibility of significant primordial…