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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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Cosmological Background Interpretation of Pulsar Timing Array Data
/ Figueroa, Daniel G. (Valencia U., IFIC) ; Pieroni, Mauro (CERN) ; Ricciardone, Angelo (Pisa U. ; Padua U.) ; Simakachorn, Peera (Valencia U., IFIC)
We discuss the interpretation of the detected signal by Pulsar Timing Array (PTA) observations as a gravitational wave background (GWB) of cosmological origin. We combine NANOGrav 15-years and EPTA-DR2new data sets and confront them against backgrounds from supermassive black hole binaries (SMBHBs), and cosmological signals from inflation, cosmic (super)strings, first-order phase transitions, Gaussian and non-Gaussian large scalar fluctuations, and audible axions. [...]
arXiv:2307.02399; CERN-TH-2023-132.-
2024-04-26 - 5 p.
- Published in : Phys. Rev. Lett. 132 (2024) 171002
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Stochastic gravitational wave background from stellar origin binary black holes in LISA
/ Babak, Stanislav (APC, Paris) ; Caprini, Chiara (Geneva U., Dept. Theor. Phys. ; CERN) ; Figueroa, Daniel G. (Valencia U., IFIC) ; Karnesis, Nikolaos (Aristotle U., Thessaloniki) ; Marcoccia, Paolo (Stavanger U.) ; Nardini, Germano (Stavanger U.) ; Pieroni, Mauro (CERN) ; Ricciardone, Angelo (Pisa U. ; Padua U.) ; Sesana, Alberto (Milan Bicocca U. ; INFN, Milan Bicocca ; Brera Observ.) ; Torrado, Jesús (Padua U. ; INFN, Padua)
We use the latest constraints on the population of stellar origin binary black holes (SOBBH) from LIGO/Virgo/KAGRA (LVK) observations, to estimate the stochastic gravitational wave background (SGWB) they generate in the frequency band of LISA. We account for the faint and distant binaries, which contribute the most to the SGWB, by extending the merger rate at high redshift assuming it tracks the star formation rate. [...]
arXiv:2304.06368.-
2023-08-14 - 39 p.
- Published in : JCAP 2308 (2023) 034
Fulltext: 2304.06368 - PDF; document - PDF;
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Science with the Einstein Telescope: a comparison of different designs
/ Branchesi, Marica (GSSI, Aquila ; Gran Sasso) ; Maggiore, Michele (Geneva U., Dept. Theor. Phys. ; Geneva U.) ; Alonso, David (Oxford U.) ; Badger, Charles (King's Coll. London) ; Banerjee, Biswajit (GSSI, Aquila ; Gran Sasso) ; Beirnaert, Freija (Gent U.) ; Belgacem, Enis (Geneva U.) ; Bhagwat, Swetha (Rome U. ; Birmingham U.) ; Boileau, Guillaume (U. Antwerp (main) ; ARTEMIS, Nice) ; Borhanian, Ssohrab (Jena U., TPI) et al.
The Einstein Telescope (ET), the European project for a third-generation gravitational-wave detector, has a reference configuration based on a triangular shape consisting of three nested detectors with 10 km arms, where in each arm there is a `xylophone' configuration made of an interferometer tuned toward high frequencies, and an interferometer tuned toward low frequencies and working at cryogenic temperature. Here, we examine the scientific perspectives under possible variations of this reference design. [...]
arXiv:2303.15923; ET-0084A-23.-
2023-07-28 - 197 p.
- Published in : JCAP 2307 (2023) 068
Fulltext: document - PDF; 2303.15923 - PDF;
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EuCAPT White Paper: Opportunities and Challenges for Theoretical Astroparticle Physics in the Next Decade
/ Alves Batista, R. (Madrid, IFT) ; Amin, M.A. (Rice U.) ; Barenboim, G. (Valencia U.) ; Bartolo, N. (U. Padua, Dept. Phys. Astron.) ; Baumann, D. (Amsterdam U. ; U. Amsterdam, GRAPPA ; U. Edinburgh, Higgs Ctr. Theor. Phys.) ; Bauswein, A. (Darmstadt, GSI) ; Bellini, E. (Geneva U., Dept. Theor. Phys.) ; Benisty, D. (Cambridge U., DAMTP ; Cambridge U., KICC ; Cambridge U., Inst. of Astron.) ; Bertone, G. (Amsterdam U. ; U. Amsterdam, GRAPPA) ; Blasi, P. (GSSI, Aquila ; Gran Sasso) et al.
Astroparticle physics is undergoing a profound transformation, due to a series of extraordinary new results, such as the discovery of high-energy cosmic neutrinos with IceCube, the direct detection of gravitational waves with LIGO and Virgo, and many others. [...]
arXiv:2110.10074.
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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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New horizons for fundamental physics with LISA
/ LISA Collaboration
The Laser Interferometer Space Antenna (LISA) has the potential to reveal wonders about the fundamental theory of nature at play in the extreme gravity regime, where the gravitational interaction is both strong and dynamical. In this white paper, the Fundamental Physics Working Group of the LISA Consortium summarizes the current topics in fundamental physics where LISA observations of GWs can be expected to provide key input. [...]
arXiv:2205.01597.-
2022-06-30 - 116 p.
- Published in : Living Rev. Relativ. 25 (2022) 4
Fulltext: 2205.01597 - PDF; document - PDF;
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