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CERN Document Server 36 notices trouvées  1 - 10suivantfin  aller vers la notice: La recherche a duré 0.70 secondes. 
1.
Curvature Perturbations from First-Order Phase Transitions: Implications to Black Holes and Gravitational Waves / Franciolini, Gabriele (CERN) ; Gouttenoire, Yann (Tel Aviv U. ; U. Mainz, PRISMA ; Mainz U., Inst. Phys.) ; Jinno, Ryusuke (Kobe U.)
We employ a covariant formalism to study the evolution of cosmological perturbations during a first-order phase transition, addressing in particular their gauge dependence that have been overlooked so far. [...]
arXiv:2503.01962. - 7.
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2.
The Irrelevance of Primordial Black Hole Clustering in the LVK mass range / Crescimbeni, F. (U. Rome La Sapienza (main) ; INFN, Rome) ; Desjacques, V. (Technion) ; Franciolini, G. (CERN) ; Ianniccari, A. (Geneva U., CAP) ; Iovino, A.J. (Geneva U., CAP) ; Perna, G. (Padua U. ; Padua U., Astron. Dept. ; INFN, Padua) ; Perrone, D. (Geneva U., CAP) ; Riotto, A. (Geneva U., CAP) ; Veermäe, H. (NICPB, Tallinn)
We show that in realistic models where primordial black holes are formed due to the collapse of sizeable inflationary perturbations, their initial spatial clustering beyond Poisson distribution does not play any role in the binary mergers, including sub-solar primordial black holes, responsible for the gravitational waves detectable by LIGO-Virgo-KAGRA. [...]
CERN-TH-2025-027 ; arXiv:2502.01617. - 14.
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3.
Reconstructing Primordial Curvature Perturbations via Scalar-Induced Gravitational Waves with LISA / LISA Cosmology Working Group Collaboration
Many early universe scenarios predict an enhancement of scalar perturbations at scales currently unconstrained by cosmological probes. [...]
arXiv:2501.11320 ; CERN-TH-2024-217. - 95.
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4.
Challenges and Opportunities of Gravitational Wave Searches above 10 kHz / Aggarwal, Nancy (Northwestern U.) ; Aguiar, Odylio D. (Sao Jose, INPE) ; Blas, Diego (Barcelona, IFAE ; ICREA, Barcelona) ; Bauswein, Andreas (Darmstadt, GSI) ; Cella, Giancarlo (INFN, Pisa) ; Clesse, Sebastian (Brussels U.) ; Cruise, Adrian Michael (Birmingham U.) ; Domcke, Valerie (CERN) ; Ellis, Sebastian (Geneva U.) ; Figueroa, Daniel G. (Valencia U., IFIC) et al.
The first direct measurement of gravitational waves by the LIGO and Virgo collaborations has opened up new avenues to explore our Universe. [...]
arXiv:2501.11723 ; CERN-TH-2025-014 ; DESY-25-007. - 138.
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5.
Ultra-Slow-Roll Inflation on the Lattice: Backreaction and Nonlinear Effects / Caravano, Angelo (Paris, Inst. Astrophys.) ; Franciolini, Gabriele (CERN) ; Renaux-Petel, Sébastien (Paris, Inst. Astrophys.)
Violating the slow-roll regime during the final stages of inflation can significantly enhance curvature perturbations, a scenario often invoked in models producing primordial black holes and small-scale scalar induced gravitational waves. [...]
arXiv:2410.23942 ; CERN-TH-2024-181. - 17.
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6.
Cosmology and nuclear-physics implications of a subsolar gravitational-wave event / Crescimbeni, Francesco (U. Rome La Sapienza (main)) ; Franciolini, Gabriele (CERN) ; Pani, Paolo (U. Rome La Sapienza (main)) ; Vaglio, Massimo (U. Rome La Sapienza (main) ; SISSA, Trieste ; INFN, Trieste)
Detecting a compact subsolar object would have profound implications in physics, the reach of which depends on the nature of the object. [...]
CERN-TH-2024-121 ; arXiv:2408.14287. - 9.
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7.
The Flea on the Elephant: tidal Love numbers in subsolar primordial black hole searches / De Luca, Valerio (Pennsylvania U.) ; Franciolini, Gabriele (CERN) ; Riotto, Antonio (Geneva U. ; Annecy, LAPTH)
Detecting subsolar objects in black hole binary mergers is considered a smoking gun signature of primordial black holes. Their supposedly vanishing tidal Love number is generically thought to help distinguish them from other subsolar and more deformable compact objects, such as neutron stars. [...]
arXiv:2408.14207; CERN-TH-2024-140.- 2024-11-15 - 9 p. - Published in : Phys. Rev. D 110 (2024) 104041 Fulltext: PDF;
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8.
Observing black hole mergers beyond the pair-instability mass gap with next-generation gravitational wave detectors / Franciolini, Gabriele (CERN) ; Kritos, Konstantinos (Johns Hopkins U.) ; Reali, Luca (Johns Hopkins U.) ; Broekgaarden, Floor (Columbia U., Astron. Astrophys. ; Johns Hopkins U. ; Columbia U. ; Stony Brook U., New York, SCGP) ; Berti, Emanuele (Johns Hopkins U.)
Stellar evolution predicts the existence of a mass gap for black hole remnants produced by pair-instability supernova dynamics, whose lower and upper edges are very uncertain. We study the possibility of constraining the location of the upper end of the pair-instability mass gap, which is believed to appear around ${m_\text{min}} \sim130M_\odot$, using gravitational wave observations of compact binary mergers with next-generation ground-based detectors. [...]
arXiv:2401.13038; CERN-TH-2024-003.- 2024-07-15 - 12 p. - Published in : Phys. Rev. D 110 (2024) 023036 Fulltext: Publication - PDF; 2401.13038 - PDF;
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9.
Pulsar timing array sensitivity to anisotropies in the gravitational wave background / Depta, Paul Frederik (Heidelberg, Max Planck Inst.) ; Domcke, Valerie (CERN) ; Franciolini, Gabriele (CERN) ; Pieroni, Mauro (CERN)
Pulsar Timing Array (PTA) observations have recently gathered substantial evidence for the existence of a gravitational wave background in the nHz frequency band. [...]
CERN-TH-2024-116 ; arXiv:2407.14460. - 20 p.
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10.
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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