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

lundi 23 octobre

Welcome: Discussions around the first coffee...

Social event: Welcome Lunch at the Cathedral

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

1 Colloquium: How to invalidate the standard (cold dark matter) model of cosmology

carlos_frenk.pdf

15:00 Coffee break

Discussion: Free discussions around simulations

Président de session: Dr Daniel Figueroa

2 Discussion around simulations

DGFigueroa_LatticeCosmologyDiscussion.pdf

Social event: Beer and Chips in the Cathedral

mardi 24 octobre

Discussion: Free discussions

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

3 Colloquium: The BBN/CMB connection: Post Planck

BBN-Paris.pdf

12:00 Coffee break

12:30 Lunch at the restaurant

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

4 Colloquium : Primordial Black Holes After 50 Years: A Positive Perspective

carr-pascal2.pdf

15:00 Coffee break

Discussion: Turning around PBH

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

5 Discussion : Turning around PBH

AstroPart2023_pbh.pdf

Discussion: Free discussions

Social event: Conference Dinner at Gramophone, Orsay

mercredi 25 octobre

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

6 Fate of métastable vacua around primordial black holes

Orateur: Dr Lucien Heurtier

Heurtier_FVD.pdf

7 MSSM inflation revisited

Orateur: M. gilles weymann-despres

MSSM_inflation_Sympo_Gilles.pdf

8 Primordial Black hole reheating and its possible signatures

Orateur: Dr Riajul Haque

AstroParticle Symposium_Riajul Haque.pdf

9 Inflationary and post-inflationary scalar dark matter production

Orateur: Prof. Marcos Garcia

Marcos.pdf

11:00 Coffee break

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

10 Freeze in at stronger coupling

Orateur: Prof. Oleg Lebedev

Orsay-2023_Lebedev.pdf

11 Minimal sterile neutrino dark matter

Orateur: Prof. Torsten Bringmann

Pascal_Bringmann.pdf

12 Gravitational Waves Shed Light on Particle Decay

Orateur: Dr Kunio Kaneta

kaneta_astroparticle2023.pdf

13 Gravitational Neutrino Reheating

Orateur: Prof. Debaprasad Maity

Astro-Particle-Paris-neutrino.pdf

12:40 Lunch at the restaurant

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 Matter-antimatter asymmetry and dark matter stability from baryon number conservation

Orateur: Prof. Alejandro Ibarra

Ibarra.pdf

15 Strong Backreaction of Axion inflation

Orateur: Dr Daniel Figueroa

DaniFigueroa_2023_10_25th_Talk.pdf

16 New Insight on Neutrino Dark Matter Interactions from Small-Scale CMB Observations

Orateur: Dr Sebastian Trojanowski

AstroPartSymposium2023_Trojanowski.pdf

17 Reheating after inflaton fragmentation

Orateur: Dr Mathias Pierre

PSAP2023_MP.pdf

15:20 Coffee break

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

18 Positivity bounds on Higgs-portal dark matter

Orateur: Prof. Hyun Min Lee

Paris2023_hmlee.pdf

19 Freeze-in baryogenesis and early matter domination

Orateur: Prof. Andreas Goudelis

AndreasAstroparticles2023.pdf

20 Higgs inflation at the pole

Orateur: Mlle Adriana Guerrero Menkara

Higgs_pole.pdf

21 History of a hot hidden dark sector

Orateur: M. Jean Kimus

Kimus_Orsay_2023.pdf

Discussion: Free discussions

jeudi 26 octobre

Discussion: Free discussions

12:30 Lunch at the restaurant

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

22 Colloquium : Cosmology with future CMB experiments

Symposium Astroparticle 2023 - CMB-5.pdf

15:00 Coffee break

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

23 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

Discussion: Free discussions

18:30 Coffee break

vendredi 27 octobre

Discussion: Gravitino Dark Matter

Président de session: Dr Vassilis Spanos

24 Discussion: Gravitino Dark Matter

ORSAY_2023_Spanos.pdf

12:30 Lunch at restaurant

Discussion: Free discussions

Social event: Farewell coffee

lundi 30 octobre

Welcome: WELCOME: registration and coffee

Adam Riess (TBC) "Already 25 years?"

16:00 Coffee break

Cliff Burgess: "Are there sensible models of dark energy?"

Burgess.pdf

mardi 31 octobre

Claudia de Rham :" So where do we stand with massive gravity?"

Link

Slava Mukhanov: "How predictive are cosmological theories?"

16:00 Coffee break

Talk: Christof Wetterich : Quantum gravity prediction for dynamical dark energy

16:30 Coffee break

Talk: Eleonora di Valentino : Investigating the H0 tension

Talk: Yann Rasera : Can we read cosmology in large-scale structures? Relativistic effects in simulated skies.

Social event: Social Dinner

mercredi 1 novembre

Talk: Robert Caldwell: What is the Universe Trying to Tell Us

Talk: Micol Benetti : Testing dark energy through quasar cosmology

11:00 Coffee break

Talk: Ronaldo Batista : Clustering Dark Energy and Cluster Abundances

Talk: Alex Vikman : Living with ghosts: stable editions

Talk: Vivian Poulin : The Ups and Downs of Early Dark Energy

Talk: Paulie Vielzeuf : Something from nothing: Cosmic voids and their sensitivity to neutrinos

Talk: Dragan Huterer : Evidence for Suppression of Growth in the Standard Cosmological Model

Talk: Santiago Casas : What will large scale structure tell us about Dark Energy in the next decade?

16:00 Coffee break

Talk: Anne Davis : Cosmography and cosmological constant

Talk: Pierre Astier : Cosmic Shear and DE

Talk: Carsten Vandebruck : Field theories and fluid descriptions for an interacting dark sector

Social event: Beer and Chips

jeudi 2 novembre

Mariana Grana: "The Swampland"

Gia Dvali: "De Sitter space-time ?"

16:00 Coffee break

Talk: Tiago Castro : Towards precision cluster cosmology: advancements in Halo Mass Function and Bias within Euclid

Talk: Matteo Martinelli : Expected Euclid constraints on Dark Energy and on consistency tests of the standard cosmological model

Talk: Stephane Ilic : More than the sum of its parts: joint analysis of LSS and CMB experiments

Francoise Combes: General Public

vendredi 3 novembre

Martin Kunz: "What will future surveys tell us about dark energy?"

Talk: Christian Marinoni : Cosmography with the expansion rate fluctuations field

Talk: Alain Blanchard : LCDM is alive and well

Talk: Amandine Le Brun : Cluster profiles as an additional cosmological probe

Talk: Federico Piazza : Properties of average distances and emergent causality

lundi 6 novembre

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 BUFFET

Free Buffet at the Pascal Institute

25 SEMINAR: Gauss-Bonnet gravity and conformally coupled scalar fields in four-dimensions

Orateur: Pedro Fernandes

Fernandes.pdf

mardi 7 novembre

26 DISCUSSION SESSION: Numerical Solutions and Scalarisation

Discussion led by Daniela Doneva

Orateur: Daniela Doneva (University of Tuebingen)

Daniela.pdf

LUNCH at THE CANTINE

27 COLLOQUIUM: Black holes beyond GR: from no-hair theorems to non-linear dynamics

Orateur: Thomas Sotiriou (Nottingham University)

Sotiriou.pdf

19:00 RESTAURANT at Orsay: "Grammophone"

Gramophone, Orsay

mercredi 8 novembre

28 DISCUSSION SESSION: Black Hole Perturbations

Discussion led by Hugo Roussille

Orateur: Hugo Roussille (ENS de Lyon)

Hugo.pdf

LUNCH at THE CANTINE

29 SEMINAR : The cosmological constant is probably still zero

Orateur: Prof. Tony Padilla (Nottingham)

30 SEMINAR: The ringdown of horizonless compact objects

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

18:00 HAPPY HOUR

31 PUBLIC LECTURE: Les trous noirs et la fin du temps en relativité générale (in french)

Orateur: Alejandro Perez (Université de Marseille)

Ale.pdf

jeudi 9 novembre

32 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

Philippe Grandclement (LUTH Meudon), "Fully consistent rotating black holes in the cubic Galileon theory"

Grandclement.pdf

33 Jibril Ben Achour (ENS Lyon), "Exploring non-perturbative gravitational waves in Horndeski gravity"

Jibril.pdf

Johanes Noller (Univ College) "A tale of two speeds-GW propagation and ringdown tests of the speed of gravity"

Noller.pdf

LUNCH at THE CANTINE

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

Jacopo.pdf

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

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

Aimeric.pdf

WORKSHOP: Jacopo Mazza (IJCLab Orsay), "The Kerr Black Hole in Einstein–Æther Gravity"

Jacopo.pdf

vendredi 10 novembre

34 DISCUSSION SESSION: Spectral Instability of Black Holes

Discussion led by Kyriakos Destounis

Orateur: Kyriakos Destounis (University of Rome)

LUNCH at THE CANTINE

35 SEMINAR: Perturbation Theory with Black Hole Quasi-Normal Modes

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

lundi 13 novembre

Welcome

12:00 Buffett lunch

Discussion: Latest news on gravitational wave observations

36 LIGO/Virgo/KAGRA

Orateur: Tito Dal Canton

Status of the O4 run of LIGO_Virgo_KAGRA.pdf

37 Discussion

38 Pulsar Timing Arrays

Orateur: Antoine Petiteau (CEA/IRFU/DPhP)

39 Discussion

mardi 14 novembre

Conference day

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

ID de réunion: 639 9768 7551
Code secret: 234207

40 An investigation into the absence of detected VHE emission from GRBs prior to 2018

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

VHE_GRB.pdf

41 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

42 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

43 GW follow-ups with IACTs

Orateur: Monica Seglar Arroyo (CEA)

GWinIACTs_vFinal.pdf

44 CTA Coordination on Real-Time and Multi-Messenger Astrophysics

Orateur: Ulisses Barres de Almeida

CTAMWL_InstitutePascal2023_compressed.pdf

11:10 Coffee break

Conference day

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

ID de réunion: 639 9768 7551
Code secret: 234207

45 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

46 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 Lunch

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)

47 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

Social event: Beer & chips

mercredi 15 novembre

Discussion: GRB 221009A: the BOAT

Présidents de session: Eric Burns, Xiang-Yu Wang

48 GRB 221009A: the BOAT

Orateurs: Eric Burns, Xiang-Yu Wang

GRB221009A_LHAASO_Xian-Yu_Wang_AstroparticleSymposium2023.pdf

The BOAT - overview.pptx

12:00 Lunch

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

jeudi 16 novembre

Discussion: Wide field-of-view gamma-ray observatories

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

49 SWGO

Orateur: Ulisses Barres de Almeida

SWGO-UlissesBarres-InstPascal23_compressed.pdf

12:00 Lunch

Social event: Social dinner

vendredi 17 novembre

Discussion: Open questions and next steps in multi-messenger astrophysics

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

12:00 Lunch