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CERN Document Server 768 notices trouvées  1 - 10suivantfin  aller vers la notice: La recherche a duré 1.61 secondes. 
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Constraints on the Pre-Big Bang scenario from a cosmological interpretation of the NANOGrav data / Conzinu, P. (INFN, Parma ; U. Parma (main)) ; Fanizza, G. (U. Lisbon (main)) ; Gasperini, M. (INFN, Bari ; U. Bari (main)) ; Pavone, E. (INFN, Bari ; U. Bari (main)) ; Tedesco, L. (INFN, Bari ; U. Bari (main)) ; Veneziano, G. (CERN ; College de France)
We discuss a recently proposed fit of the 15-year data set obtained from the North American Nanohertz Observatory for Gravitational Waves (NANOGrav) in terms of a relic stochastic background of primordial gravitons, produced in the context of the string cosmology pre-big bang scenario. [...]
arXiv:2412.01734 ; CERN-TH-2024-210 ; BA-TH/809-24. - 19.
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Gabriele Veneziano / Veneziano, Gabriele (speaker)
2024 - 186. Conferences, Workshops & Schools; Alvaro@80 External links: Talk details; Event details In : Alvaro@80
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Baryon-number — flavor separation in the topological expansion of QCD / Frenklakh, David (SUNY, Stony Brook) ; Kharzeev, Dmitri (SUNY, Stony Brook ; Brookhaven) ; Rossi, Giancarlo (INFN, Rome ; Enrico Fermi Ctr., Rome) ; Veneziano, Gabriele (CERN ; College de France)
Gauge invariance of QCD dictates the presence of string junctions in the wave functions of baryons. In high-energy inclusive processes, these baryon junctions have been predicted to induce the separation of the flows of baryon number and flavor. [...]
arXiv:2405.04569; CERN-TH-2024-055.- 2024-07-30 - 27 p. - Published in : JHEP 2407 (2024) 262 Fulltext: 2405.04569 - PDF; document - PDF;
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From the string vacuum to FLRW or de Sitter via $\alpha'$ corrections / Conzinu, P. (Pisa U. ; INFN, Pisa) ; Fanizza, G. (Lisbon U.) ; Gasperini, M. (Bari U. ; INFN, Bari) ; Pavone, E. (Bari U. ; INFN, Bari) ; Tedesco, L. (Bari U. ; INFN, Bari) ; Veneziano, G. (CERN ; College de France)
We first make more precise a recent "Hamiltonian" reformulation of the Hohm-Zwiebach approach to the tree-level, $O(d,d)$-invariant string cosmology equations at all orders in the $\alpha'$ expansion, and recall how it allows to give a simple characterization of a large class of cosmological scenarios connecting, through a non-singular bounce, two duality-related perturbative solutions at early and late times. We then discuss the effects of adding to the action a non-perturbative, $O(d,d)$-breaking, dilaton potential $V(\phi)$. [...]
arXiv:2308.16076; BA-TH/808-23; CERN-TH-2023-163.- 2023-12-12 - 30 p. - Published in : JCAP 2312 (2023) 019 Fulltext: 2308.16076 - PDF; document - PDF;
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Gravitational Amplitudes: from Gedanken to Real Experiments / Veneziano, Gabriele (speaker)
2023 - 3219. Conferences, Workshops & Schools; Amplitudes 2023 Conference External links: Talk details; Event details In : Amplitudes 2023 Conference
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The gravitational eikonal: from particle, string and brane collisions to black-hole encounters / Di Vecchia, Paolo (Bohr Inst. ; Nordita ; Royal Inst. Tech., Stockholm) ; Heissenberg, Carlo (Nordita ; Royal Inst. Tech., Stockholm ; Uppsala U.) ; Russo, Rodolfo (Queen Mary, U. of London) ; Veneziano, Gabriele (CERN ; College de France)
Motivated by conceptual problems in quantum theories of gravity, the gravitational eikonal approach, inspired by its electromagnetic predecessor, has been successfully applied to the transplanckian energy collisions of elementary particles and strings since the late eighties, and to string-brane collisions in the past decade. After the direct detection of gravitational waves from black-hole mergers, most of the attention has shifted towards adapting these methods to the physics of black-hole encounters. [...]
arXiv:2306.16488; CERN-TH-2023-108; NORDITA 2023-026; QMUL-PH-23-09; UUITP-14/23.- 2024-07-01 - 215 p. - Published in : Phys. Rep. 1083 (2024) 1-169 Fulltext: 2306.16488 - PDF; Publication - PDF;
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Non-singular pre-big bang scenarios from all-order $\alpha'$ correctionsNon-singular pre-big bang scenarios from all-order α′ corrections / Gasperini, M. (Bari U. ; INFN, Bari) ; Veneziano, G. (CERN ; College de France)
We reformulate in Hamiltonian language the recent proposal by Hohm and Zwiebach of an action yielding the most general $O(d,d)$-symmetric string cosmology equations, at tree-level in the string-loop expansion, but to all orders in the $\alpha'$ expansion. This allows us to give a simple characterization of a large class of non-singular, non-perturbative, pre-big bang scenarios smoothly interpolating between a low-energy initial accelerated (string frame) expansion and a phase of final (string and Einstein frame) decelerated expansion. [...]
arXiv:2305.00222; BA-TH/807-23; CERN-TH-2023-066.- 2023-07-18 - 20 p. - Published in : JHEP 2307 (2023) 144 Fulltext: document - PDF; 2305.00222 - PDF;
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The Role of Quantum Mechanics in Modern Cosmology / Veneziano, Gabriele (CERN ; College de France)
I will briefly review, in simple terms, the crucial role of quantum mechanics in modern inflationary cosmology. Quantum processes throughout the inflationary epoch determine the subsequent evolution of our Universe, including the formation of its large-scale structures (galaxies, clusters, voids, ...). [...]
2022 - 13 p. - Published in : 10.1007/978-3-031-05625-3_2
In : Advances in cosmology, pp.23-35
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Classical Gravitational Observables from the Eikonal Operator / Di Vecchia, Paolo (Bohr Inst. ; Nordita ; Stockholm U.) ; Heissenberg, Carlo (Nordita ; Stockholm U. ; Uppsala U.) ; Russo, Rodolfo (Queen Mary, U. of London (main)) ; Veneziano, Gabriele (CERN ; College de France)
We propose two possible eikonal operators encoding the effects of classical radiation as coherent states of gravitons and show how to compute from them different classical observables. In the first proposal, only genuinely propagating gravitons are included, while, in the second, zero-frequency modes are added in order to recover the effects of a static gravitational field. [...]
arXiv:2210.12118; CERN-TH-2022-169; NORDITA 2022-071; QMUL-PH-22-32; UUITP-42/22.- 2023-07-03 - 12 p. - Published in : Phys. Lett. B 843 (2023) 138049 Fulltext: Publication - PDF; 2210.12118 - PDF;
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Concluding remarks / Veneziano, Gabriele (speaker) (CERN & College de France)
2022 - 1599. Conferences & Workshops; Veneziano 80 External links: Talk details; Event details In : Veneziano 80
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CERN Document Server : 768 notices trouvées   1 - 10suivantfin  aller vers la notice:
Voir aussi: noms d'auteurs similaires
309 VENEZIANO, Gabriele
170 Veneziano, G
309 Veneziano, Gabriele
339 Veneziano, Giovanni
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