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Gravitational waves from inflation in LISA: reconstruction pipeline and physics interpretation
/ LISA Cosmology Working Group Collaboration
Various scenarios of cosmic inflation enhance the amplitude of the stochastic gravitational wave background (SGWB) at frequencies detectable by the LISA detector. We develop tools for a template-based analysis of the SGWB and introduce a template databank to describe well-motivated signals from inflation, prototype their template-based searches, and forecast their reconstruction with LISA. [...]
arXiv:2407.04356; LISA-COSWG-24-03; CERN-TH-2024-072.-
2024-11-20 - 82 p.
- Published in : JCAP 2411 (2024) 032
Fulltext: PDF;
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LISA Definition Study Report
/ Colpi, Monica (INFN, Milan Bicocca) ; Danzmann, Karsten (Hannover, Max Planck Inst. Grav.) ; Hewitson, Martin (Hannover, Max Planck Inst. Grav.) ; Jetzer, Philippe (U. Zurich (main)) ; Nelemans, Gijs (Nijmegen U., IMAPP) ; Petiteau, Antoine (IRFU, Saclay) ; Shoemaker, David (MIT, MKI) ; Sopuerta, Carlos (ICE, Bellaterra) ; Stebbins, Robin (Colorado U.) ; Tanvir, Nial (Leicester U.) et al.
The Laser Interferometer Space Antenna (LISA) is the first scientific endeavour to detect and study gravitational waves from space. [...]
arXiv:2402.07571.
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155.
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Cosmology with the Laser Interferometer Space Antenna
/ LISA Cosmology Working Group Collaboration
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 gravitational-wave backgrounds and their implications for early universe and particle physics, from the MeV to the Planck scale. However, the range of potential cosmological applications of gravitational wave observations extends well beyond these two objectives. [...]
arXiv:2204.05434; LISA CosWG-22-03; FERMILAB-PUB-22-349-SCD.-
2023-08-28 - 176 p.
- Published in : Living Rev. Relativ. 26 (2023) 5
Fulltext: jt - PDF; 2204.05434 - PDF; Fulltext from Publisher: PDF; External link: Fermilab Library Server
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Challenges and Opportunities of Gravitational Wave Searches at MHz to GHz Frequencies
/ Aggarwal, Nancy (Northwestern U.) ; Aguiar, Odylio D. (Sao Jose, INPE) ; Bauswein, Andreas (Darmstadt, GSI) ; Cella, Giancarlo (INFN, Pisa) ; Clesse, Sebastian (Brussels U.) ; Cruise, Adrian Michael (Birmingham U.) ; Domcke, Valerie (Geneva U., Dept. Theor. Phys. ; LPHE, Lausanne ; DESY) ; Figueroa, Daniel G. (Valencia U., IFIC) ; Geraci, Andrew (Northwestern U.) ; Goryachev, Maxim (Western Australia U.) et al.
The first direct measurement of gravitational waves by the LIGO and Virgo collaborations has opened up new avenues to explore our Universe. This white paper outlines the challenges and gains expected in gravitational wave searches at frequencies above the LIGO/Virgo band, with a particular focus on Ultra High-Frequency Gravitational Waves (UHF-GWs), covering the MHz to GHz range. [...]
arXiv:2011.12414; CERN-TH-2020-185; HIP-2020-28/TH; DESY 20-195; CERN-TH-2020-185; HIP-2020-28/TH; DESY 20-195.-
2021-12-06 - 60 p.
- Published in : Living Rev. Relativ. 24 (2021) 4
Fulltext: document - PDF; 2011.12414 - PDF;
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Characterizing the Cosmological Gravitational Wave Background Anisotropies and non-Gaussianity
/ Bartolo, Nicola (U. Padua, Dept. Phys. Astron. ; INFN, Padua ; Padua Observ.) ; Bertacca, Daniele (U. Padua, Dept. Phys. Astron. ; INFN, Padua) ; Matarrese, Sabino (U. Padua, Dept. Phys. Astron. ; INFN, Padua ; Padua Observ. ; GSSI, Aquila) ; Peloso, Marco (Padua U., Dept. Pure Appl. Math. ; INFN, Padua) ; Ricciardone, Angelo (INFN, Padua) ; Riotto, Antonio (Geneva U., CAP ; CERN ; Geneva U., Dept. Theor. Phys.) ; Tasinato, Gianmassimo (Swansea U.)
A future detection of the Stochastic Gravitational Wave Background (SGWB) with GW experiments is expected to open a new window on early universe cosmology and on the astrophysics of compact objects. In this paper we study SGWB anisotropies, that can offer new tools to discriminate between different sources of GWs. [...]
arXiv:1912.09433.-
2020-07-17 - 22 p.
- Published in : Phys. Rev. D 102 (2020) 023527
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Prospects for Fundamental Physics with LISA
/ LISA Collaboration
In this paper, which is of programmatic rather than quantitative nature, we aim to further delineate and sharpen the future potential of the LISA mission in the area of fundamental physics. Given the very broad range of topics that might be relevant to LISA, we present here a sample of what we view as particularly promising directions, based in part on the current research interests of the LISA scientific community in the area of fundamental physics. [...]
arXiv:2001.09793.-
2020-08-31 - 22 p.
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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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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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The Ineludible non-Gaussianity of the Primordial Black Hole Abundance
/ De Luca, V. (Geneva U., CAP) ; Franciolini, G. (Geneva U., CAP) ; Kehagias, A. (Natl. Tech. U., Athens) ; Peloso, M. (U. Padua, Dept. Phys. Astron. ; INFN, Padua) ; Riotto, A. (Geneva U., CAP ; CERN) ; Ünal, C. (Rez, Nucl. Phys. Inst.)
We study the formation of primordial black holes when they are generated by the collapse of large overdensities in the early universe. Since the density contrast is related to the comoving curvature perturbation by a nonlinear relation, the overdensity statistics is unavoidably non-Gaussian. [...]
arXiv:1904.00970.-
2019-07-31 - 26 p.
Fulltext: PDF;
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