AstroParticle Symposium 2023

23 oct. 2023, 09:00 → 17 nov. 2023, 16:30 Europe/Paris

Institut Pascal

Christos Charmousis (IJCLab), Eugeny Babichev (IJCLab), Fabian Schussler, Fabio Acero, François Brun, Karim Noui (IJCLab, Paris-Saclay), Laura Salvati, Olivier Deligny, Simon Clery, Yann Mambrini, philippe brax

A specialist meeting in Astroparticle Physics that will take place at the Pascal Institute of the Paris-Saclay University for a 4 week program.

The format will be flexible enough to allow for strong interactions between participants. There will be working sessions every day with dedicated office space for participants a « conference » format day per week with invited speakers.

A preliminary outline of the topics across the 4 weeks:

1. Theory of the early universe and dark matter
2. 25 years of dark energy
3. Compact objects in gravitational theories
4. Observations of the transient and high-energy sky

 

Under the sponsorship of P2IO, P2I, IN2P3 master project, CEA, IAS and OSUPS

 

AstroparticleSymposium2023_week4.png

bandeau week 1.jpg

bandeau week 2.JPG

lun. 23 octobre ¶

09:00 → 12:00 Welcome: Discussions around the first coffee...¶

12:00 → 14:00 Social event: Welcome Lunch at the Cathedral¶

14:00 → 15:00 Colloquium: How to invalidate the standard (cold dark matter) model of cosmology¶

https://cern.zoom.us/j/65572654388?pwd=bTdJR0hITDY4b0s5UVlLNXZONUFUdz09

ID de réunion: 655 7265 4388
Code secret: 869718

Président de session: Carlos Frenk

14:00 Colloquium: How to invalidate the standard (cold dark matter) model of cosmology¶

carlos_frenk.pdf

15:00 → 15:30 Coffee break

15:30 → 16:30 Discussion: Free discussions around simulations¶

Président de session: Dr Daniel Figueroa

15:30 Discussion around simulations¶

DGFigueroa_LatticeCosmologyDiscussion.pdf

16:30 → 18:00 Social event: Beer and Chips in the Cathedral¶

mar. 24 octobre ¶

09:00 → 11:00 Discussion: Free discussions¶

11:00 → 12:00 Colloquium: The BBN/CMB connection: Post Planck¶

https://cern.zoom.us/j/65572654388?pwd=bTdJR0hITDY4b0s5UVlLNXZONUFUdz09

ID de réunion: 655 7265 4388
Code secret: 869718

Président de session: Keith Olive

11:00 Colloquium: The BBN/CMB connection: Post Planck¶

BBN-Paris.pdf

12:00 → 12:30 Coffee break

12:30 → 14:00 Lunch at the restaurant

14:00 → 15:00 Colloquium: Primordial Black Holes After 50 Years: A Positive Perspective¶

https://cern.zoom.us/j/65572654388?pwd=bTdJR0hITDY4b0s5UVlLNXZONUFUdz09

ID de réunion: 655 7265 4388
Code secret: 869718

Président de session: Prof. Bernard Carr

14:00 Colloquium : Primordial Black Holes After 50 Years: A Positive Perspective¶

carr-pascal2.pdf

15:00 → 15:30 Coffee break

15:30 → 17:00 Discussion: Turning around PBH¶

Présidents de session: Dr Donald Kpatcha, Dr Lucien Heurtier, Prof. Vincent Vennin

15:30 Discussion : Turning around PBH¶

AstroPart2023_pbh.pdf

17:00 → 19:00 Discussion: Free discussions¶

19:00 → 22:00 Social event: Conference Dinner at Gramophone, Orsay¶

mer. 25 octobre ¶

09:40 → 11:00 Conference day¶

https://cern.zoom.us/j/63997687551?pwd=eTlmeVdWQmxuQlFhRklMUSsrY3pIZz09

ID de réunion: 639 9768 7551
Code secret: 234207

Président de session: Prof. Andreas Goudelis

09:40 Fate of métastable vacua around primordial black holes¶

Orateur: Dr Lucien Heurtier

Heurtier_FVD.pdf

10:00 MSSM inflation revisited¶

Orateur: M. gilles weymann-despres

MSSM_inflation_Sympo_Gilles.pdf

10:20 Primordial Black hole reheating and its possible signatures¶

Orateur: Dr Riajul Haque

AstroParticle Symposium_Riajul Haque.pdf

10:40 Inflationary and post-inflationary scalar dark matter production¶

Orateur: Prof. Marcos Garcia

Marcos.pdf

11:00 → 11:20 Coffee break

11:20 → 12:40 Conference day¶

https://cern.zoom.us/j/63997687551?pwd=eTlmeVdWQmxuQlFhRklMUSsrY3pIZz09

ID de réunion: 639 9768 7551
Code secret: 234207

Président de session: Prof. Alejandro Ibarra

11:20 Freeze in at stronger coupling¶

Orateur: Prof. Oleg Lebedev

Orsay-2023_Lebedev.pdf

11:40 Minimal sterile neutrino dark matter¶

Orateur: Prof. Torsten Bringmann

Pascal_Bringmann.pdf

12:00 Gravitational Waves Shed Light on Particle Decay¶

Orateur: Dr Kunio Kaneta

kaneta_astroparticle2023.pdf

12:20 Gravitational Neutrino Reheating¶

Orateur: Prof. Debaprasad Maity

Astro-Particle-Paris-neutrino.pdf

12:40 → 14:00 Lunch at the restaurant

14:00 → 15:20 Conference day¶

https://cern.zoom.us/j/63997687551?pwd=eTlmeVdWQmxuQlFhRklMUSsrY3pIZz09

ID de réunion: 639 9768 7551
Code secret: 234207

Président de session: Prof. Torsten Bringmann

14:00 Matter-antimatter asymmetry and dark matter stability from baryon number conservation¶

Orateur: Prof. Alejandro Ibarra

Ibarra.pdf

14:20 Strong Backreaction of Axion inflation¶

Orateur: Dr Daniel Figueroa

DaniFigueroa_2023_10_25th_Talk.pdf

14:40 New Insight on Neutrino Dark Matter Interactions from Small-Scale CMB Observations¶

Orateur: Dr Sebastian Trojanowski

AstroPartSymposium2023_Trojanowski.pdf

15:00 Reheating after inflaton fragmentation¶

Orateur: Dr Mathias Pierre

PSAP2023_MP.pdf

15:20 → 15:40 Coffee break

15:40 → 17:00 Conference day¶

https://cern.zoom.us/j/63997687551?pwd=eTlmeVdWQmxuQlFhRklMUSsrY3pIZz09

ID de réunion: 639 9768 7551
Code secret: 234207

Président de session: Prof. Marcos Garcia

15:40 Positivity bounds on Higgs-portal dark matter¶

Orateur: Prof. Hyun Min Lee

Paris2023_hmlee.pdf

16:00 Freeze-in baryogenesis and early matter domination¶

Orateur: Prof. Andreas Goudelis

AndreasAstroparticles2023.pdf

16:20 Higgs inflation at the pole¶

Orateur: Mlle Adriana Guerrero Menkara

Higgs_pole.pdf

16:40 History of a hot hidden dark sector¶

Orateur: M. Jean Kimus

Kimus_Orsay_2023.pdf

17:00 → 18:30 Discussion: Free discussions¶

jeu. 26 octobre ¶

10:00 → 12:30 Discussion: Free discussions¶

12:30 → 14:00 Lunch at the restaurant

14:00 → 15:00 Colloquium: Cosmology with future CMB experiments¶

https://cern.zoom.us/j/65572654388?pwd=bTdJR0hITDY4b0s5UVlLNXZONUFUdz09

ID de réunion: 655 7265 4388
Code secret: 869718

Président de session: Prof. Sophie Henrot-Versille

14:00 Colloquium : Cosmology with future CMB experiments¶

Symposium Astroparticle 2023 - CMB-5.pdf

15:00 → 15:15 Coffee break

15:15 → 16:15 Colloquium: Multimessenger observations with gravitational waves from ground-based interferometers¶

https://cern.zoom.us/j/65572654388?pwd=bTdJR0hITDY4b0s5UVlLNXZONUFUdz09

ID de réunion: 655 7265 4388
Code secret: 869718

Président de session: Tito Dal Canton

15:15 Colloquium: Multimessenger observations with gravitational waves from ground-based interferometers¶

Astroparticle_Symposium_2023_talk.pdf

Astroparticle Symposium - Multimessenger observations with gravitational waves from ground-based interferometers

16:15 → 18:30 Discussion: Free discussions¶

18:30 → 19:00 Coffee break

ven. 27 octobre ¶

11:00 → 12:30 Discussion: Gravitino Dark Matter¶

Président de session: Dr Vassilis Spanos

11:00 Discussion: Gravitino Dark Matter¶

ORSAY_2023_Spanos.pdf

12:30 → 14:00 Lunch at restaurant

14:00 → 17:00 Discussion: Free discussions¶

17:00 → 18:00 Social event: Farewell coffee¶

lun. 30 octobre ¶

10:00 → 12:00 Welcome: WELCOME: registration and coffee¶

14:00 → 16:00 Adam Riess (TBC) "Already 25 years?"¶

16:00 → 16:30 Coffee break

16:30 → 18:30 Cliff Burgess: "Are there sensible models of dark energy?"¶

Burgess.pdf

mar. 31 octobre ¶

10:00 → 12:00 Claudia de Rham :" So where do we stand with massive gravity?"¶

Link

14:00 → 16:00 Slava Mukhanov: "How predictive are cosmological theories?"¶

16:00 → 16:30 Coffee break

16:30 → 17:00 Talk: Christof Wetterich : Quantum gravity prediction for dynamical dark energy¶

16:30 Coffee break

17:00 → 17:30 Talk: Eleonora di Valentino : Investigating the H0 tension¶

17:30 → 18:00 Talk: Yann Rasera : Can we read cosmology in large-scale structures? Relativistic effects in simulated skies.¶

19:30 → 21:30 Social event: Social Dinner¶

mer. 1 novembre ¶

10:00 → 10:30 Talk: Robert Caldwell: What is the Universe Trying to Tell Us¶

10:30 → 11:00 Talk: Micol Benetti : Testing dark energy through quasar cosmology¶

11:00 → 11:30 Coffee break

11:30 → 12:00 Talk: Ronaldo Batista : Clustering Dark Energy and Cluster Abundances¶

12:00 → 12:30 Talk: Alex Vikman : Living with ghosts: stable editions¶

14:00 → 14:30 Talk: Vivian Poulin : The Ups and Downs of Early Dark Energy¶

14:30 → 15:00 Talk: Paulie Vielzeuf : Something from nothing: Cosmic voids and their sensitivity to neutrinos¶

15:00 → 15:30 Talk: Dragan Huterer : Evidence for Suppression of Growth in the Standard Cosmological Model¶

15:30 → 16:00 Talk: Santiago Casas : What will large scale structure tell us about Dark Energy in the next decade?¶

16:00 → 16:30 Coffee break

16:30 → 17:00 Talk: Anne Davis : Cosmography and cosmological constant¶

17:00 → 17:30 Talk: Pierre Astier : Cosmic Shear and DE¶

17:30 → 18:00 Talk: Carsten Vandebruck : Field theories and fluid descriptions for an interacting dark sector¶

18:30 → 19:30 Social event: Beer and Chips¶

jeu. 2 novembre ¶

10:00 → 12:00 Mariana Grana: "The Swampland"¶

14:00 → 16:00 Gia Dvali: "De Sitter space-time ?"¶

16:00 → 16:30 Coffee break

16:30 → 17:00 Talk: Tiago Castro : Towards precision cluster cosmology: advancements in Halo Mass Function and Bias within Euclid¶

17:00 → 17:30 Talk: Matteo Martinelli : Expected Euclid constraints on Dark Energy and on consistency tests of the standard cosmological model¶

17:30 → 18:00 Talk: Stephane Ilic : More than the sum of its parts: joint analysis of LSS and CMB experiments¶

19:30 → 21:30 Francoise Combes: General Public¶

ven. 3 novembre ¶

10:00 → 12:00 Martin Kunz: "What will future surveys tell us about dark energy?"¶

14:00 → 14:30 Talk: Christian Marinoni : Cosmography with the expansion rate fluctuations field¶

14:30 → 15:00 Talk: Alain Blanchard : LCDM is alive and well¶

15:00 → 15:30 Talk: Amandine Le Brun : Cluster profiles as an additional cosmological probe¶

15:30 → 16:00 Talk: Federico Piazza : Properties of average distances and emergent causality¶

lun. 6 novembre ¶

10:00 → 12:00 DISCUSSION SESSION: Exact Solutions and Exotic Compact Objects¶

Discussion chaired and led by Nicolas Lecoeur (IJCLab)

Président de session: Nicolas Lecoeur (IJCLab, Paris Saclay University)

Nicolas.pdf

12:00 → 14:00 BUFFET

Free Buffet at the Pascal Institute

14:00 → 15:00 SEMINAR: Gauss-Bonnet gravity and conformally coupled scalar fields in four-dimensions¶

Orateur: Pedro Fernandes

Fernandes.pdf

mar. 7 novembre ¶

10:00 → 12:00 DISCUSSION SESSION: Numerical Solutions and Scalarisation¶

Discussion led by Daniela Doneva

Orateur: Daniela Doneva (University of Tuebingen)

Daniela.pdf

12:00 → 14:00 LUNCH at THE CANTINE¶

14:00 → 15:00 COLLOQUIUM: Black holes beyond GR: from no-hair theorems to non-linear dynamics¶

Orateur: Thomas Sotiriou (Nottingham University)

Sotiriou.pdf

19:00 → 21:00 RESTAURANT at Orsay: "Grammophone"

Gramophone, Orsay

mer. 8 novembre ¶

10:00 → 12:00 DISCUSSION SESSION: Black Hole Perturbations¶

Discussion led by Hugo Roussille

Orateur: Hugo Roussille (ENS de Lyon)

Hugo.pdf

12:00 → 14:00 LUNCH at THE CANTINE¶

14:00 → 15:00 SEMINAR : The cosmological constant is probably still zero¶

Orateur: Prof. Tony Padilla (Nottingham)

16:00 → 17:00 SEMINAR: The ringdown of horizonless compact objects¶

Orateur: Elisa Maggio (Max Planck Institute for Gravitational Physics, Albert Einstein Institute, Potsdam)

18:00 → 19:00 HAPPY HOUR

19:25 → 20:25 PUBLIC LECTURE: Les trous noirs et la fin du temps en relativité générale (in french)¶

Orateur: Alejandro Perez (Université de Marseille)

Ale.pdf

jeu. 9 novembre ¶

10:00 → 10:30 Athanasios Bakopoulos (NTUA Athens) “Compact Objects in Scalar-Tensor theories”¶

We analyse in all generality beyond Horndeski theories of shift symmetry in a static and spherically symmetric spacetime. By introducing four auxiliary functions, we write the field equations in a particularly compact form. We show that assuming additionally parity symmetry renders the system directly integrable giving multiple families of black-hole solutions. These have typically an asymptotically-flat Reissner-Nordstrom behaviour, and emerge in the presence of a canonical kinetic term for the scalar field. In the absence of parity symmetry, we present a general method which allows us to integrate the field equations by choosing the form of only one coupling function and an auxiliary quantity. This method leads to asymptotically flat and AdS black hole solutions with differing properties. We finally discuss disformal transformations within this context as a means of obtaining wormhole and black hole solutions in different theories.

Philippe Grandclement (LUTH Meudon)

"Fully consistent rotating black holes in the cubic Galileon theory"
Previous attempts to construct numerically rotating black holes in the cubic Galileon theory were based on the use of quasi-circular coordinates. However it was noticed at that time that this choice was inconsistent with the properties of the theory thus leading to (small) violations of some components of Einstein's equations. A formalism based on the maximal slicing condition and a spatial harmonic gauge enables to cure this problem and to obtain, for the first time, fully consistent rotating black hole solutions in this context. I will present the formalism that describes the black hole as an apparent horizon in equilibrium. The resulting system of equations is solved numerically using spectral methods. The properties of the obtained configurations will be discussed, in particular the violation of the zeroth-law of black hole thermodynamics.

bakopoulos.pdf

10:30 → 11:00 Philippe Grandclement (LUTH Meudon), "Fully consistent rotating black holes in the cubic Galileon theory"¶

Grandclement.pdf

11:30 → 12:00 Jibril Ben Achour (ENS Lyon), "Exploring non-perturbative gravitational waves in Horndeski gravity"¶

Jibril.pdf

12:00 → 12:30 Johanes Noller (Univ College) "A tale of two speeds-GW propagation and ringdown tests of the speed of gravity"¶

Noller.pdf

12:30 → 14:30 LUNCH at THE CANTINE¶

14:30 → 15:00 WORKSHOP: Adolfo Cisterna (Charles U., Prague), "New black holes in General Relativity: Generalizations of the Plebanski-Demianski family"¶

Jacopo.pdf

15:00 → 15:30 WORKSHOP: Giulia Ventagli (CEICO Prague), "Neutron stars as a novel probe of the cosmological constant problem"¶

16:00 → 16:30 WORKSHOP: Aimeric Colléaux, "Classification of degenerate U(1) vector-tensor theory and kinetic 2-form actions"¶

Aimeric.pdf

16:30 → 17:00 WORKSHOP: Jacopo Mazza (IJCLab Orsay), "The Kerr Black Hole in Einstein–Æther Gravity"¶

Jacopo.pdf

ven. 10 novembre ¶

10:00 → 12:00 DISCUSSION SESSION: Spectral Instability of Black Holes¶

Discussion led by Kyriakos Destounis

Orateur: Kyriakos Destounis (University of Rome)

12:00 → 13:30 LUNCH at THE CANTINE¶

13:30 → 14:30 SEMINAR: Perturbation Theory with Black Hole Quasi-Normal Modes¶

Orateur: Laura Sberna (Max Planck Institute for Gravitational Physics (Albert Einstein Institute))

lun. 13 novembre ¶

11:00 → 12:00 Welcome¶

12:00 → 14:00 Buffett lunch

14:00 → 16:00 Discussion: Latest news on gravitational wave observations¶

14:00 LIGO/Virgo/KAGRA¶

Orateur: Tito Dal Canton

Status of the O4 run of LIGO_Virgo_KAGRA.pdf

14:20 Discussion¶

15:00 Pulsar Timing Arrays¶

Orateur: Antoine Petiteau (CEA/IRFU/DPhP)

15:20 Discussion¶

mar. 14 novembre ¶

09:30 → 11:10 Conference day¶

https://cern.zoom.us/j/63997687551?pwd=eTlmeVdWQmxuQlFhRklMUSsrY3pIZz09

ID de réunion: 639 9768 7551
Code secret: 234207

09:30 An investigation into the absence of detected VHE emission from GRBs prior to 2018¶

Orateur: Halim ASHKAR (CNRS - Ecole Polytechnique - LLR)

VHE_GRB.pdf

09:50 Probing Gamma-Ray Burst at Very High Energy : Results from 15 Years of H.E.S.S. Observations¶

Orateur: Mathieu de Bony de Lavergne (IRFU, CEA, Université Paris-Sacla)

20231114_AstroparticuleSymposium.pdf

10:10 H.E.S.S. real-time follow-up on high-energy neutrino alerts from IceCube¶

Orateur: Federica Bradascio (CEA/IRFU)

astro_symposium_Nov2023_HESS_ICfollowups.pdf

10:30 GW follow-ups with IACTs¶

Orateur: Monica Seglar Arroyo (CEA)

GWinIACTs_vFinal.pdf

10:50 CTA Coordination on Real-Time and Multi-Messenger Astrophysics¶

Orateur: Ulisses Barres de Almeida

CTAMWL_InstitutePascal2023_compressed.pdf

11:10 → 11:30 Coffee break

11:30 → 12:30 Conference day¶

https://cern.zoom.us/j/63997687551?pwd=eTlmeVdWQmxuQlFhRklMUSsrY3pIZz09

ID de réunion: 639 9768 7551
Code secret: 234207

11:30 Diffuse gamma-ray and neutrino background from Galactic Ridge¶

We show that the IceCube observation of the Galactic neutrino flux component confirms the hint of detection of neutrinos from the Galactic Ridge (the inner part of the Milky Way disk within the Galactic longitude |l|<30 degrees), previously reported by the ANTARES collaboration. This confirmation indicates that the bulk of the high-energy flux from the Galactic Ridge in multi-TeV band is produced by interactions of high-energy protons and atomic nuclei, rather than electrons. We show that both ANTARES and IceCube measurements agree with the Fermi-LAT telescope measurements of the gamma-ray emission from the Ridge. The multi-messenger (neutrino plus gamma-ray) spectrum of the Ridge over a broad energy range from 10 GeV to 10 TeV is consistent with a model of pion decay emission produced by a power-law distribution of protons with a slope Gamma~2.5, harder than that of the locally observed cosmic ray spectrum. This provides for the first time an unambiguous multi-messenger demonstration of the variability of the spectrum of cosmic rays across the Galactic disk.

https://arxiv.org/pdf/2307.07978.pdf

Orateur: Dmitri Semikoz

Galactic_ridge_Sacley_Nov2023.pdf

11:50 Elusive Diffuse Gamma-Ray Emission in Galaxy Clusters: The Role of Cosmic-Ray Transport¶

Orateur: Patrick Reichherzer (University of Oxford)

2023_Paris-Saclay_PR.pdf

12:30 → 14:00 Lunch

15:00 → 16:30 Colloquium: Mind everywhere: the future of engineering¶

https://cern.zoom.us/j/65572654388?pwd=bTdJR0hITDY4b0s5UVlLNXZONUFUdz09

ID de réunion: 655 7265 4388
Code secret: 869718

Président de session: Balázs Kégl (LAL)

15:00 Mind everywhere: the future of engineering¶

Imagine a world where each "thing" comes with AI built-in. Your phone video app, to assure that you enjoy uninterrupted service, intelligently buffers the video and requests a varying number of packets ahead, using predictive models about you, the video you are watching, and the world. The mobile base station allocates frequencies, roams phones, focuses beams intelligently to serve all phones in the cell and to minimize energy consumption. This system requires layered decision-making, persuasion more than direct control, continually learned and updated world models and policies that lead to local, individuated systems which will evolve during their lifetime and across generations. The system will be more similar to a living organism than to a machine. To design such systems, engineering will need to go through a paradigm shift, inspired by modern developmental biology, neuroscience, and cognitive science, themselves also recently going through paradigm shifts. I will sketch some of this latest developments, specifically Michael Levin's Technological Approach to Mind Everywhere (TAME) proposal and Mark Solms' Artificial Consciousness project, and how they inspire rethinking engineering.

Orateur: Balazs Kegl

20231114_balazs_tame.pdf

19:00 → 21:00 Social event: Beer & chips¶

mer. 15 novembre ¶

10:00 → 12:00 Discussion: GRB 221009A: the BOAT¶

Présidents de session: Eric Burns, Xiang-Yu Wang

10:00 GRB 221009A: the BOAT¶

Orateurs: Eric Burns, Xiang-Yu Wang

GRB221009A_LHAASO_Xian-Yu_Wang_AstroparticleSymposium2023.pdf

The BOAT - overview.pptx

12:00 → 13:30 Lunch

14:00 → 15:30 Special session: DZA: the German Center for Astrophysics¶

https://cern.zoom.us/j/63911043676?pwd=dXRCc0dnRzEvQVRZN1dZeGZ0Z05hZz09

ID de réunion: 639 1104 3676
Code secret: 471477

Présidents de session: Günther Hasinger, Stefan Ohm

jeu. 16 novembre ¶

10:00 → 12:00 Discussion: Wide field-of-view gamma-ray observatories¶

Présidents de session: Miguel Mostafa (Penn State Univ.), Zhen Cao

11:30 SWGO¶

Orateur: Ulisses Barres de Almeida

SWGO-UlissesBarres-InstPascal23_compressed.pdf

12:00 → 13:30 Lunch

19:00 → 23:00 Social event: Social dinner¶

ven. 17 novembre ¶

10:00 → 12:00 Discussion: Open questions and next steps in multi-messenger astrophysics¶

Présidents de session: Bing Theodore Zhang (YITP, kyoto University), Kotha Murase

12:00 → 14:00 Lunch