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The effect of outflows on CMB bounds from Primordial Black Hole accretion
/ Piga, Lorenzo (Parma U. ; INFN, Parma) ; Lucca, Matteo (Brussels U.) ; Bellomo, Nicola (Texas U., TCC) ; Bosch-Ramon, Valentì (ICC, Barcelona U.) ; Matarrese, Sabino (U. Padua, Dept. Phys. Astron. ; INFN, Padua ; Padua Observ. ; GSSI, Aquila) ; Raccanelli, Alvise (U. Padua, Dept. Phys. Astron. ; INFN, Padua ; Padua Observ. ; CERN) ; Verde, Licia (ICC, Barcelona U. ; ICREA, Barcelona)
Should Primordial Black Holes (PBHs) exist in nature, they would inevitably accrete baryonic matter in their vicinity. In turn, the consequent emission of high-energy radiation could affect the thermal history of the universe to an extent that can be probed with a number of cosmological observables such as the Cosmic Microwave Background (CMB) anisotropies. [...]
arXiv:2210.14934; ULB-TH/22-14; UTWI-11-2022.-
2022-12-12 - 36 p.
- Published in : JCAP 2212 (2022) 016
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2.
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From Primordial Black Holes Abundance to Primordial Curvature Power Spectrum (and back)
/ Kalaja, Alba (Padua U., Astron. Dept. ; ICC, Barcelona U. ; U. Groningen, VSI) ; Bellomo, Nicola (ICC, Barcelona U. ; U. Barcelona (main)) ; Bartolo, Nicola (Padua U., Astron. Dept. ; INFN, Padua ; Padua Observ.) ; Bertacca, Daniele (Padua U., Astron. Dept. ; INFN, Padua) ; Matarrese, Sabino (Padua U., Astron. Dept. ; INFN, Padua ; Padua Observ. ; GSSI, Aquila) ; Musco, Ilia (ICC, Barcelona U.) ; Raccanelli, Alvise (ICC, Barcelona U. ; CERN) ; Verde, Licia (ICC, Barcelona U. ; ICREA, Barcelona)
In the model where Primordial Black Holes (PBHs) form from large primordial curvature (C) perturbations, i.e., CPBHs, constraints on PBH abundance provide in principle constraints on the primordial curvature power spectrum. This connection however depends necessarily on the details of PBH formation mechanism. [...]
arXiv:1908.03596.-
2019-10-11 - 52 p.
- Published in : JCAP 1910 (2019) 031
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3.
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Anisotropies and non-Gaussianity of the Cosmological Gravitational Wave Background
/ Bartolo, N. (U. Padua, Dept. Phys. Astron. ; INFN, Padua ; Padua U. ; Padua Observ.) ; Bertacca, D. (U. Padua, Dept. Phys. Astron. ; INFN, Padua ; Padua U., Astron. Dept.) ; Matarrese, S. (U. Padua, Dept. Phys. Astron. ; GSSI, Aquila ; INFN, Padua ; Padua U.) ; Peloso, M. (INFN, Padua ; U. Padua, Dept. Phys. Astron.) ; Ricciardone, A. (INFN, Padua) ; Riotto, A. (CERN ; Geneva U., CAP) ; Tasinato, G. (Swansea U.)
The Stochastic Gravitational Wave Background (SGWB) is expected to be a key observable for Gravitational Wave (GW) interferometry. Its detection will open a new window on early universe cosmology and on the astrophysics of compact objects. [...]
arXiv:1908.00527.-
2019-12-04 - 7 p.
- Published in : Phys. Rev. D 100 (2019) 121501
Fulltext: PDF; Fulltext from Publisher: PDF;
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4.
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Gravitational wave background from primordial black holes in globular clusters
/ Vanzan, Eleonora (Padua U. ; INFN, Padua) ; Libanore, Sarah (Padua U. ; Ben Gurion U. of Negev) ; Valbusa Dall'Armi, Lorenzo (Padua U. ; INFN, Padua) ; Bellomo, Nicola (Padua U. ; INFN, Padua ; U. Texas, Austin (main) ; Texas U.) ; Raccanelli, Alvise (Padua U. ; INFN, Padua ; Padua Observ. ; CERN)
Primordial black holes still represent a viable candidate for a significant fraction, if not for the totality, of dark matter. If these compact objects have masses of order tens of solar masses, their coalescence can be observed by current and future ground-based gravitational wave detectors. [...]
arXiv:2405.13871.-
2024-10-03 - 44 p.
Fulltext: document - PDF; 2405.13871 - PDF;
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5.
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Gravitational Wave Anisotropies from Primordial Black Holes
/ Bartolo, N. (INFN, Padua ; Padua U.) ; Bertacca, D. (INFN, Padua ; Padua U., Astron. Dept.) ; De Luca, V. (Geneva U., CAP) ; Franciolini, G. (Geneva U., CAP) ; Matarrese, S. (GSSI, Aquila ; INFN, Padua ; Padua U.) ; Peloso, M. (INFN, Padua ; U. Padua, Dept. Phys. Astron.) ; Ricciardone, A. (INFN, Padua ; Stavanger U.) ; Riotto, A. (CERN ; Geneva U., CAP) ; Tasinato, G. (Swansea U.)
An observable stochastic background of gravitational waves is generated whenever primordial black holes are created in the early universe thanks to a small-scale enhancement of the curvature perturbation. We calculate the anisotropies and non-Gaussianity of such stochastic gravitational waves background which receive two contributions, the first at formation time and the second due to propagation effects. [...]
arXiv:1909.12619.-
2020-02-26 - 21 p.
- Published in : JCAP 2002 (2020) 028
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Science with the space-based interferometer LISA. IV: Probing inflation with gravitational waves
/ Bartolo, Nicola (Padua U. ; INFN, Padua ; Padua Observ.) ; Caprini, Chiara (APC, Paris) ; Domcke, Valerie (APC, Paris) ; Figueroa, Daniel G. (CERN) ; Garcia-Bellido, Juan (Madrid, IFT) ; Guzzetti, Maria Chiara (Padua U. ; INFN, Padua) ; Liguori, Michele (Padua U. ; INFN, Padua ; Padua Observ.) ; Matarrese, Sabino (Padua U. ; INFN, Padua ; Padua Observ. ; GSSI, Aquila) ; Peloso, Marco (Minnesota U.) ; Petiteau, Antoine (APC, Paris) et al.
We investigate the potential for the LISA space-based interferometer to detect the stochastic gravitational wave background produced from different mechanisms during inflation. Focusing on well-motivated scenarios, we study the resulting contributions from particle production during inflation, inflationary spectator fields with varying speed of sound, effective field theories of inflation with specific patterns of symmetry breaking and models leading to the formation of primordial black holes. [...]
arXiv:1610.06481; ACFI-T16-19; UMN-TH-3608-16; CERN-TH-2016-222; KCL-PH-TH-2016-58; IFT-UAM-CSIC-16-104.-
2016-12-14 - 63 p.
- Published in : JCAP 12 (2016) 026
Fulltext: PDF; External link: Preprint
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7.
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Projection effects on the observed angular spectrum of the astrophysical stochastic gravitational wave background
/ Bertacca, Daniele (U. Padua, Dept. Phys. Astron. ; INFN, Padua ; Padua Observ.) ; Ricciardone, Angelo (INFN, Padua) ; Bellomo, Nicola (ICC, Barcelona U.) ; Jenkins, Alexander C. (King's Coll. London) ; Matarrese, Sabino (U. Padua, Dept. Phys. Astron. ; INFN, Padua ; Padua Observ. ; GSSI, Aquila) ; Raccanelli, Alvise (CERN) ; Regimbau, Tania (Annecy, LAPP) ; Sakellariadou, Mairi (King's Coll. London)
The detection and characterization of the Stochastic Gravitational Wave Background (SGWB) is one of the main goals of Gravitational Wave (GW) experiments. The observed SGWB will be the combination of GWs from cosmological (as predicted by many models describing the physics of the early Universe) and astrophysical origins, which will arise from the superposition of GWs from unresolved sources whose signal is too faint to be detected. [...]
arXiv:1909.11627; CERN-TH-2019-153; KCL-PH-TH 2019-73.-
2020-05-12 - 15 p.
- Published in : Phys. Rev. D 101 (2020) 103513
Fulltext: PDF; Fulltext from Publisher: PDF; Fulltext from publisher: PDF;
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Machine-Detector interface for multi-TeV Muon Collider
/ Bartosik, Nazar (INFN, Turin ; CERN) ; Calzolari, Daniele (CERN ; INFN, Padua ; Padua U.) ; Castelli, Luca (Rome U. ; INFN, Rome) ; Lechner, Anton (CERN) ; Lucchesi, Donatella (INFN, Padua ; CERN ; Padua U.)
/International Muon Collider Collaboration
One of the challenges of the multi-TeV muon collider is mitigating the effects of beam-induced background. The primary contribution to this background has been identified as decay products of the muon beams. [...]
2024 - 6 p.
- Published in : PoS EPS-HEP2023 (2024) 630
Fulltext: PDF;
In : 2023 European Physical Society Conference on High Energy Physics (EPS-HEP2023), Hamburg, Germany, 20 - 25 Aug 2023, pp.630
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9.
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Signatures of Primordial non-Gaussianities in the Matter Power-Spectrum and Bispectrum: the Time-RG Approach
/ Bartolo, Nicola (Padua U. ; INFN, Padua) ; Almeida, Juan P.Beltrán (Sao Paulo, IFT) ; Matarrese, Sabino (Padua U. ; INFN, Padua) ; Pietroni, Massimo (INFN, Padua) ; Riotto, Antonio (INFN, Padua ; CERN)
We apply the time-renormalization group approach to study the effect of primordial non-Gaussianities in the non-linear evolution of cosmological dark matter density perturbations. This method improves the standard perturbation approach by solving renormalization group-like equations governing the dynamics of gravitational instability. [...]
CERN-PH-TH-2009-260; arXiv:0912.4276; CERN-PH-TH-2009-260.-
2010 - 26 p.
- Published in : JCAP 03 (2010) 011
Preprint: PDF; External link: Preprint
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10.
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CLASS_GWB: robust modeling of the astrophysical gravitational wave background anisotropies
/ Bellomo, Nicola (Texas U. ; U. Barcelona (main)) ; Bertacca, Daniele (U. Padua (main) ; INFN, Padua ; Padua Observ.) ; Jenkins, Alexander C. (King's Coll. London) ; Matarrese, Sabino (U. Padua (main) ; INFN, Padua ; Padua Observ. ; GSSI, Aquila) ; Raccanelli, Alvise (U. Padua (main) ; INFN, Padua ; CERN) ; Regimbau, Tania (Annecy, LAPP) ; Ricciardone, Angelo (U. Padua (main) ; INFN, Padua) ; Sakellariadou, Mairi (King's Coll. London)
Gravitational radiation offers a unique possibility to study the large-scale structure of the Universe, gravitational wave sources and propagation in a completely novel way. Given that gravitational wave maps contain a wealth of astrophysical and cosmological information, interpreting this signal requires a non-trivial multidisciplinary approach. [...]
arXiv:2110.15059; KCL-PH-TH-2021-70.-
2022-06-27 - 58 p.
- Published in : JCAP 2206 (2022) 030
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