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SUMMARY:UNDARK 2026: Illuminating Cosmic Discord
DTSTART:20260907T070000Z
DTEND:20260911T180000Z
DTSTAMP:20260911T115800Z
UID:indico-event-1616316@indico.cern.ch
CONTACT:THworkshops.secretariat@cern.ch
DESCRIPTION:Speakers: Vivian Poulin (LUPM\, CNRS & U. de Montpellier\, Fra
 nce)\, Ricardo Genova Santos\, Laura Herold\, Matteo Braglia\, Matthew Jos
 eph Lewandowski (CERN)\, Valerie Domcke (CERN)\, Miguel Escudero Abenza (C
 ERN)\, Andrea Caputo (CERN)\n\n* Important notice: Gate B fully closed fro
 m Monday 31 August *\nFrom Monday\, 31 August 2026\, Gate B (the main acc
 ess to CERN) will be fully closed\, while Gate A will be open 24/7 throu
 ghout the works.\nGuests accessing the CERN Hotel on their arrival shall u
 se Gate A (or C\, keeping in mind the opening hours). Guests arriving at 
 the CERN Hotel after midnight on their check-in day\, will collect their r
 oom key with the security guard on duty at Gate A (open 24/7).\nFor the la
 test information on site access\, please consult this link:\nhttps://sce-d
 ep.web.cern.ch/projects/redevelopment-of-entrance-b/\n \nScam notice: As 
 is common these days\, some participants have reported receiving scam emai
 ls claiming to provide various services (such as transport\, lodging\, etc
 .) for the workshop. Please delete these and only communicate directly wit
 h the organizers and the CERN Theory Department secretariat.\n \nModern c
 osmology is at a crossroads.  The standard LCDM model\, while incredibly 
 successful\, faces a series of persistent challenges and "tensions" betwee
 n key datasets.  The most prominent one is on today’s expansion rate (H
 _0 tension) but others have emerged on the late redshift expansion potenti
 ally calling for a time dependent dark energy.  These tensions may sugges
 t either new physics or unresolved systematic errors.  This places us at 
 a crossroads\, where the lack of a robust concordance model challenges our
  ability to interpret precision cosmology\, key to address some open quest
 ions in particle physics.\nSimultaneously\, we are in an era of unpreceden
 ted data flow.  Initial results from DESI\, mature analyses from ACT and 
 KiDS\, and paradigm-challenging discoveries from JWST (such as the "Little
  Red Dots") provide a complex\, and potentially contradictory\, picture of
  the cosmos.\nThis workshop is motivated by the urgent need to move beyond
  single-tension discussions. We must synthesize these new\, multi-probe da
 tasets and theoretical ideas into a consistent global picture. The worksho
 p will bring together experts in theory\, observation\, and computation to
  evaluate where concordance remains robust\, where it breaks down\, and ho
 w the next generation of surveys and theoretical tools can close the gap.\
 nThere is no registration fee for this workshop\, and a remote connection 
 will be possible.Invited speakers and panelists:Gagandeep Anand (Space Tel
 escope Science Institute) Camille Bonvin (University of Geneva)Ruth Durrer
  (University of Geneva)Patricia Diego-Palazuelos (Max Planck Institute for
  Astrophysics) Georges Efstathiou (University of Cambridge\, Institute of
  Astronomy) Willem Elbers (Durham University) Mathias Garny (Technical Uni
 versity of Munich) Cara Giovanetti (LBNL\, Berkeley)Carlos Hernández Mont
 eagudo (Instituto de Astrofísica de Canarias)Martin Kunz (University of G
 eneva)Francisco-Shu Kitaura (Instituto de Astrofísica de Canarias) Julien
  Lesgourgues (RWTH Aachen University) Meng-Xiang Lin (Simon Fraser Univers
 ity)Jamie McCullough (Princeton University) Azadeh Moradinezhad Dizgah (C
 NRS\, LAPTh Annecy) Rohan Naidu (MIT)Alice Pisani (Aix-Marseille Universit
 e\, CNRS/IN2P3\, CPPM)Cyril Pitrou (Institut d'Astrophysique de Paris\, IA
 P)Anna Maria Porredon (CIEMAT) Mickaël Rigault (IP2I Lyon\, CNRS / Univer
 sité Claude Bernard Lyon 1) José Alberto Rubiño Martín (Instituto de A
 strofísica de Canarias) Alessio Spurio Mancini (Royal Holloway\, Universi
 ty of London) Subir Sarkar (University of Oxford)Nils Schöneberg (LMU Mun
 ich)Matthieu Tristram (IJClab Université Paris-Saclay)Licia Verde (ICREA 
 / Institute of Cosmos Sciences\, University of Barcelona) Francisco Villae
 scusa-Navarro (Simons Foundation)Zachary J. Weiner (Perimeter Institute)Or
 ganisers:Matteo BragliaAndrea CaputoValerie DomckeMiguel EscuderoRicardo G
 enova SantosLaura HeroldMatthew Joseph LewandowksiVivian Pouilin\n \nThis
  TH Institute is supported by UNDARK and is funded through the Widening pa
 rticipation and spreading excellence programme (project number 101159929).
 \n\n\nhttps://indico.cern.ch/event/1616316/\n\nZoom: https://cern.zoom.us/
 j/69107892166?pwd=MHQBXbcQhklKjYaaP1PIFpurbbCZhd.1
LOCATION:4/3-006 - TH Conference Room (CERN)
URL:https://indico.cern.ch/event/1616316/
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