A5104439996- Cosmology and Gravitation Theories
- Galaxies: Formation, Evolution, Phenomena
- Black Holes and Theoretical Physics
- Dark Matter and Cosmic Phenomena
- Astronomy and Astrophysical Research
- Particle physics theoretical and experimental studies
- Scientific Research and Discoveries
- Astrophysics and Cosmic Phenomena
- Relativity and Gravitational Theory
- Solar and Space Plasma Dynamics
- Geophysics and Gravity Measurements
- Noncommutative and Quantum Gravity Theories
- Neutrino Physics Research
- Computational Physics and Python Applications
- Radio Astronomy Observations and Technology
- Advanced Thermodynamics and Statistical Mechanics
- Gamma-ray bursts and supernovae
- Advanced NMR Techniques and Applications
- Plant and animal studies
- Stellar, planetary, and galactic studies
- Structural Health Monitoring Techniques
- Complex Network Analysis Techniques
- Algebraic and Geometric Analysis
- Advanced Physical and Chemical Molecular Interactions
- Atomic and Subatomic Physics Research
University of Parma
2019-2025
Istituto Nazionale di Fisica Nucleare, Gruppo Collegato di Parma
2019-2024
Istituto Nazionale di Fisica Nucleare
2021
Stanford University
2019-2020
European Organization for Nuclear Research
2016-2019
Weizmann Institute of Science
2019
New York University
2011-2015
Scuola Internazionale Superiore di Studi Avanzati
2008-2011
Istituto Nazionale di Fisica Nucleare, Sezione di Trieste
2009-2011
University of Trieste
2010-2011
The Effective Field Theory of Large-Scale Structure (EFTofLSS) is a formalism that allows us to predict the clustering Cosmological in mildly non-linear regime an accurate and reliable way. After validating our technique against several sets numerical simulations, we perform analysis for cosmological parameters DR12 BOSS data. We assume $\Lambda$CDM, fixed value baryon/dark-matter ratio, $\Omega_b/\Omega_c$, tilt primordial power spectrum, $n_s$, no significant input from simulations. By...
We explore the cosmological solutions of a recently proposed extension general relativity with Lorentz-invariant mass term. show that same constraint removes Boulware-Deser ghost in this theory also prohibits existence homogeneous and isotropic solutions. Nevertheless, within domains size inverse graviton we find approximately can well describe past present Universe. At energy densities above certain crossover value, these approximate standard Friedmann-Robertson-Walker evolution great...
The LHCb measurement of the $\mu/e$ ratio $R_{K^*}$ indicates a deficit with respect to Standard Model prediction, supporting earlier hints lepton universality violation observed in $R_K$ ratio. We show that and ratios alone constrain chiralities states contributing these anomalies, we find deviations from at $4\sigma$ level. This conclusion is further corroborated by theoretically challenging $b\to s\mu^+\mu^-$ distributions. Theoretical interpretations terms $Z'$, lepto-quarks, loop...
We apply the Effective Field Theory of Large-Scale Structure to analyze $w$CDM cosmological model. By using full shape power spectrum and BAO post-reconstruction measurements from BOSS, Supernovae Pantheon, a prior BBN, we set competitive CMB-independent limit $w=-1.046_{-0.052}^{+0.055}$ at $68\%$ C.L.. After adding Planck CMB data, find $w=-1.023_{-0.030}^{+0.033}$ Our results are obtained PyBird, new, fast Python-based code which make publicly available.
After calibrating the predictions of Effective Field Theory Large-Scale Structure against several sets simulations, as well implementing a new method to assert scale cut theory without use any simulation, we analyze Full Shape BOSS Correlation Function. Imposing prior from Big Bang Nucleosynthesis on baryon density, are able measure all parameters in $\Lambda$CDM + massive neutrinos normal hierarchy, except for total neutrino mass, which is just bounded. When combining with Baryon Acoustic...
Abstract We analyze the BOSS power spectrum monopole and quadrupole, bispectrum quadrupole data, using predictions from Effective Field Theory of Large-Scale Structure (EFTofLSS). Specifically, we use one loop prediction for monopole, tree level quadrupole. After validating our pipeline against numerical simulations as well checking several internal consistencies, apply it to observational data. find that analyzing higher wavenumbers thanks one-loop prediction, addition tree-level...
Abstract We apply the Effective Field Theory of Large-Scale Structure (EFTofLSS) to analyze cosmological models with clustering quintessence, which allows us consistently describe parameter region in quintessence equation state w < -1. First, we extend description biased tracers redshift space presence and compute one-loop power spectrum. solve EFTofLSS equations using exact time dependence, is relevant obtain unbiased constraints. Then, fitting full shape BOSS pre-reconstructed spectrum...
We study generic single-field dark energy models, by a parametrization of the most general theory their perturbations around given background, including higher derivative terms. In appropriate limits this approach reproduces standard quintessence, k-essence and ghost condensation. find no pathology associated to an equation state wQ < −1 or in crossing phantom divide = −1. Stability requires that side behaves, on cosmological scales, as fluid with virtually zero speed sound. This implies one...
General Relativity (GR), with or without matter fields, admits a natural extension to scale invariant theory that requires dilaton. Here we show the recently formulated massive GR, minimally coupled matter, possesses new global symmetry related scaling of reference coordinates respect physical ones. The field enforcing this symmetry, dubbed here quasidilaton, coincides an ordinary dilaton if only pure gravity is considered, but differs from it when Lagrangian present. We study (1)...
We present a critical assessment of the SN1987A supernova cooling bound on axions and other light particles. Core collapse simulations used in literature to substantiate omitted from calculation envelope exterior proto-neutron star (PNS). As result, only source neutrinos these was, by construction, PNS. show that if canonical delayed neutrino mechanism failed explode SN1987A, precollapse was rotating, then an accretion disk would form could explain late-time ($t\ensuremath{\gtrsim}5\text{...
The precision of the cosmological data allows us to accurately approximate predictions for observables by Taylor expanding up a low order dependence on parameters around reference cosmology. By applying this observation redshift-space one-loop galaxy power spectrum Effective Field Theory Large-Scale Structure, we analyze BOSS DR12 scanning over all ΛCDM cosmology with massive neutrinos. We impose several sets priors, widest which is just Big Bang Nucleosynthesis prior current fractional...
An accurate theoretical template for the galaxy power spectrum is a key success of ongoing and future spectroscopic surveys. We examine to what extent Effective Field Theory Large Scale Structure able provide such correctly estimate cosmological parameters. To that end, we initiate blinded challenge infer parameters from redshift-space high-resolution mock catalogs mimicking BOSS sample but covering hundred times larger cumulative volume. This gigantic simulation volume allows us separate...
We forecast the scientific capabilities to improve our understanding of cosmic inflation CORE, a proposed CMB space satellite submitted in response ESA fifth call for medium-size mission opportunity. The CORE will map anisotropies temperature and polarization 19 frequency channels spanning range 60-600 GHz. have an aggregate noise sensitivity $1.7 \mu$K$\cdot \,$arcmin angular resolution 5' at 200 explore impact telescope size on science return by making forecasts several instrumental...
Future observations of cosmic microwave background (CMB) polarisation have the potential to answer some most fundamental questions modern physics and cosmology, including: what physical process gave birth Universe we see today? What are dark matter energy that seem constitute 95% density Universe? Do need extensions standard model particle interactions? Is ΛCDM cosmological scenario correct, or missing an essential piece puzzle? In this paper, list requirements for a future CMB survey...
The observation of an absorption feature in the 21-cm spectrum at redshift z≈17 implies bounds on dark-matter (DM) annihilations for a broad range masses, given that significant heating intergalactic medium would have erased such feature. resulting DM annihilation cross sections are comparable to strongest ones from all other observables.
We analyze the power spectrum and bispectrum of BOSS galaxy-clustering data using prediction from Effective Field Theory Large-Scale Structure at one-loop order for $\textit{both}$ $\textit{and}$ bispectrum. With $\Lambda$CDM parameters fixed to Planck preferred values, we set limits on three templates non-Gaussianities predicted by many inflationary models: equilateral, orthogonal, local shapes. After validating our analysis against simulations, find $f_{\rm NL}^{\rm equil.}= 245 \pm 293\,...
Abstract The disagreement between direct late-time measurements of the Hubble constant from SH0ES collaboration, and early-universe based on ΛCDM model Planck collaboration might, at least in principle, be explained by new physics early universe. Recently, application Effective Field Theory Large-Scale Structure to full shape power spectrum SDSS/BOSS data has revealed a new, rather powerful, way measure other cosmological parameters surveys. In light this, we analyze two models for universe...
Abstract We develop a pipeline to set new constraints on scale-independent modified gravity, from the galaxy power spectrum in redshift space of BOSS DR12. The latter is modelled using effective field theory large-scale structure up 1-loop order perturbation theory. test our synthetic and simulated data, assess systematic biases inferred cosmological parameters due marginalization theoretical errors, we apply it normal branch DGP model with ΛCDM background. When applied data simulations,...
Abstract We derive the Effective Field Theory of Large-Scale Structure kernels and counterterms for one-loop bispectrum dark matter biased tracers in real redshift space. This requires expansion up to fourth order fluctuations. In process, we encounter several subtleties related renormalization. One is fact that, renormalizing momentum, a local counterterm contributes non-locally. A second subtlety renormalization products velocity fields, which need be expressed terms renormalized preserve...
Abstract Former analyses of the BOSS data using Effective Field Theory Large-Scale Structure (EFTofLSS) have measured that largest counterterms are redshift-space distortion ones. This allows us to adjust power-counting rules theory, and explicitly identify leading next-order terms a specific dependence on cosine angle between line-of-sight wavenumber observable, μ . Such -dependence construct linear combination multipoles, P̸ , where these contributions effectively projected out, so...
We study the consequences of imposing an approximate Galilean symmetry on Effective Theory Inflation, theory small perturbations around inflationary background. This approach allows us to effect operators with two derivatives each field, which can be leading interactions due non-renormalization properties Lagrangian. In this case cubic non-Gaussianities are given by three independent operators, containing up six derivatives, a shape close equilateral and one peaking flattened isosceles...
We study the spherical collapse model in presence of quintessence with negligible speed sound. This case is particularly motivated for w<-1 as it required by stability. As pressure gradients are negligible, follows dark matter during collapse. The overdensity behaves a separate closed FLRW universe, so that its evolution can be studied exactly. derive critical and we use extended Press-Schechter theory to how clustering affects mass function. effect dominated modification linear growth A...
We prove that, in a generic single-field model, the consistency relation for 3-point function squeezed limit receives corrections that vanish quadratically ratio of momenta, i.e. as (k_L/k_S)^2. This implies detection bispectrum signal going 1/k_L^2 limit, is suppressed only by one power k_L compared with local shape, would rule out all models. The absence this kind terms holds also multifield models, but if fields have mass much smaller than H. any scale dependence bias, scales larger size...