Abstract

The LHC and direct detection experiments have had the most interesting possible outcome: the observation of a Higgs boson in isolation. This has left a void in theoretical particle physics, making the traditional questions on the origin of the weak scale and on the nature of dark matter deeper and more confusing than ever. The field has responded by producing a number of ideas that trace the answer to these questions to the early history of the Universe.
At the same time a number of new probes of the evolution of the Universe are planned or are already taking data. This calls for a meeting place where particle physicists, astrophysicists and cosmologists can join forces to refine theoretical ideas, find new experimental targets and benefit from the expertise needed to answer the most pressing questions in fundamental physics. This workshop will offer to the particle physics community access to a wealth of present and future cosmological data. To astrophysics and cosmology it will give a window on the latest ideas that connect their disciplines to the fundamental laws of particle interactions.
We are on the brink of a new data-driven era in cosmology. This is the best time to bring these different communities together and pave the way for the next discovery in fundamental physics.

Topics
The schedule is
1. Oct 4-9: Dark matter in non-standard cosmologies
2. Oct 11-15: Astrophysics as a fundamental physics laboratory
3. Oct 18-22: Cosmological approaches to fine-tuning problems and their tests
4. Oct 25-29: Testing fundamental physics with low- and high-redshift cosmology
5. Nov 1-5: New physics in (primordial) gravitational waves
6. Nov 8-12: Symposium
A number of confirmed key participants will help leading the discussion around the topics above: Asimina Arvanitaki (Perimeter Institute), Xingang Chen (Harvard University), Julien Lesgourges (Aachen University), Géraldine Servant (DESY, Hamburg University), Sergey Sibiryakov (Perimeter Institute), Tomer Volansky (Tel Aviv University).


Organizers
Raffaele Tito D'Agnolo (CEA-IPHT, raffaele-tito.dagnolo@ipht.fr);
Cora Dvorkin (Harvard Univerisity, cdvorkin@g.harvard.edu);
Michael Geller (Tel Aviv University, micgeller@tauex.tau.ac.il);
Diego Redigolo (CERN-INFN Florence, d.redigolo@gmail.com);
Filippo Sala (LPTHE, filo.sala@gmail.com);
Javi Serra (TUM, javi.serra@tum.de);
Raman Sundrum (University of Maryland, raman@umd.edu);


Local organizer
Carlo Alberto Cremonini, Rocco Rollo

Contact
carlo.alberto.cremonini@gmail.com
rocco.rollo@gssi.it




The workshop will be held in presence. Given the still uncertain circumstances, we foresee all seminars to take place also online, independently of the travel restrictions in the Fall. If you wish to apply to the online activities only, please write it explicitly in the comment section of the application form. Thank you for your cooperation. More detailed information will be sent to the participants closer to the dates of the workshop.


Talks

Date	Speaker	Title	Type	Useful Links
Oct 04, 2021 - 12:00-13:00		Gong Show - Self-intro of in-person participants	Introduction
Oct 04, 2021 - 16:00-16:45	Michele Redi (INFN Firenze)	Dark Matter from Dark Gauge Theories	Seminar					Video
Oct 04, 2021 - 16:45-17:30		Discussion session	Discussion
Oct 05, 2021 - 16:00-16:45	Iason Baldes (ULB Brussels)	Dark Matter During Supercooled Confinement	Seminar					Video
Oct 05, 2021 - 16:45-17:30	Juri Smirnov (The Ohio State University)	Thermal Squeezeout of Dark Matter	Seminar					Video
Oct 05, 2021 - 17:30-18:00		Discussion	Discussion
Oct 06, 2021 - 16:00-16:45	Robert McGehee (University of Michigan)	Maximizing Direct Detection with HYPER Dark Matter	Seminar					Video
Oct 07, 2021 - 12:00-13:00		Questions & Discussion	Discussion
Oct 07, 2021 - 16:00-16:45	Francesco D'Eramo (University of Padua & INFN)	Hot axions	Seminar					Video
Oct 07, 2021 - 16:45-17:30		Discussion session	Discussion
Oct 08, 2021 - 16:00-16:45	Andrea Caputo (Tel Aviv University)	Axions, Dark Photons and radio data in our inhomogeneous universe	Seminar					Video
Oct 08, 2021 - 16:45-17:30	Joshua Foster (MIT)	Simulating Axion Emission from a String Network with Adaptive Mesh Refinement	Seminar					Video
Oct 08, 2021 - 17:30-18:00		Discussion	Discussion
Oct 11, 2021 - 12:00-13:00		Gong Show - Self-intro of in-person participants	Introduction
Oct 11, 2021 - 16:00-16:45	Ken Van Tilburg (NYU and Flatiron Institute)	Phenomenology of Stellar Basins	Seminar					Video
Oct 11, 2021 - 16:45-17:30		Discussion	Discussion
Oct 12, 2021 - 16:00-16:45	Joshua Eby (Kavli IPMU)	Terrestrial Signals from Axion Star Explosions	Seminar					Video
Oct 12, 2021 - 16:45-17:30	Hyungjin Kim (DESY)	Interstellar medium and PBHs	Seminar					Video
Oct 12, 2021 - 17:30-18:00		Discussion	Discussion
Oct 13, 2021 - 16:00-16:45	Diego Blas (Autonoma U. and IFAE, Barcelona)	Binary systems as gravitational wave detectors	Seminar					Video
Oct 13, 2021 - 17:00-18:30	Savas Dimopoulos (Stanford)	GGI Tea Breaks - Particle Physics circa 2021	TH Colloquium
Oct 14, 2021 - 16:00-16:45	Jorge Martin Camalich (Insituto de Astrofísica de Canarias)	Supernova bound on dark flavored sectors	Seminar					Video
Oct 14, 2021 - 16:45-17:30	Nitsan Bar (Weizmann)	Is there a supernova bound on axions?	Seminar					Video
Oct 15, 2021 - 16:00-16:45	Csaba Csaki (Cornell)	Crunching solution to the hierarchy problem	Seminar					Video
Oct 15, 2021 - 16:45-17:30		Discussion	Discussion
Oct 18, 2021 - 12:00-13:00		Gong Show - Self-intro of in-person participants	Introduction
Oct 18, 2021 - 16:00-16:45	Daniele Teresi (CERN)	Sliding Naturalness	Seminar					Video
Oct 18, 2021 - 16:45-17:30	Hyung Do Kim (Seoul National University)	The weak scale as a trigger	Seminar					Video
Oct 18, 2021 - 17:30-18:00		Discussion	Discussion
Oct 19, 2021 - 16:00-16:45	Enrico Morgante (Mainz University)	(Rel-)axion fragmentation	Seminar					Video
Oct 19, 2021 - 16:45-17:30	Abhishek Banerjee (Weizmann)	Probing Relaxion (scalars) at the precision frontier	Seminar					Video
Oct 19, 2021 - 17:30-18:00		Discussion	Discussion
Oct 20, 2021 - 15:00-15:45	Seth Koren (University of Chicago)	A Cosmological Lithium Solution from N_gen = Z_Li	Seminar
Oct 20, 2021 - 15:45-16:30	Tevong You (CERN)	Self-organised localisation	Seminar					Video
Oct 20, 2021 - 16:30-17:00		Discussion	Discussion
Oct 20, 2021 - 17:00-18:00	Asimina Arvanitaki, Savas Dimopoulos, Giovanni Villadoro	Can there be a history in the multiverse?	Discussion
Oct 21, 2021 - 16:00-16:45	Fabrizio Rompineve (Tufts University)	New Physics for Cosmological Concordance	Seminar					Video
Oct 21, 2021 - 16:45-17:30	Benedict von Harling (IFAE, Barcelona)	Baryogenesis via gauge field production from a relaxing Higgs	Seminar					Video
Oct 21, 2021 - 17:30-18:00		Discussion	Discussion
Oct 22, 2021 - 16:00-16:45	Asimina Arvanitaki (Perimeter Institute)	The piezoaxionic effect	Seminar					Video
Oct 22, 2021 - 16:45-17:30		Discussion	Discussion
Oct 25, 2021 - 12:00-13:00		Gong show - Self intro of in-person participants	Introduction
Oct 25, 2021 - 16:00-16:45	Joachim Kopp	Dark Matter from Cosmological Phase Transitions	Seminar					Video
Oct 25, 2021 - 16:45-17:30	Marko Simonovic	Prospects for new physics from galaxy surveys	Seminar					Video
Oct 26, 2021 - 16:00-16:45	Thejs Brinckmann	Self-interacting neutrinos, the Hubble parameter tension, and the Cosmic Microwave Background	Seminar					Video
Oct 26, 2021 - 16:45-17:30	Guillermo Ballesteros	Primordial black holes as dark matter	Seminar					Video
Oct 27, 2021 - 15:00-15:45	Cristina Mondino	The discovery potential of astrometric weak lensing	Seminar					Video
Oct 27, 2021 - 15:45-16:30	Marco Gorghetto	Dark Matter and Gravitational Waves from post-inflationary Axions	Seminar					Video
Oct 28, 2021 - 16:00-16:45	Sebastian Ellis	Tuning In to Radio Gravity	Seminar					Video
Oct 28, 2021 - 16:45-17:30	Josh Ruderman	Pandemic Dark Matter	Seminar					Video
Oct 29, 2021 - 16:00-16:45	Nick Rodd	The Cosmic Axion Background	Seminar					Video
Nov 02, 2021 - 12:00-13:00		Gong show - Self intro of in-person participants	Introduction
Nov 02, 2021 - 16:00-16:45	Julien Lesgourgues	A fair comparison of potential Hubble-tension-solving cosmological models	Seminar					Video
Nov 02, 2021 - 16:45-17:30	Jeff Dror	Supermassive black hole binaries as particle physics laboratories	Seminar					Video
Nov 03, 2021 - 15:00-15:45	Matteo Fasiello	Testing the Early Universe with Primordial Messengers	Seminar					Video
Nov 03, 2021 - 15:45-16:30	Daniel Egana-Ugrinovic	Probing ultra-light bosons with stellar tidal disruption events	Seminar					Video
Nov 04, 2021 - 16:00-16:45	Djuna Croon	A new proposal towards phase transition phenomenology	Seminar					Video
Nov 04, 2021 - 16:45-17:30	Sebastien Renaux-Petel	Probing primordial features with the Stochastic Gravitational Wave Background	Seminar					Video
Nov 05, 2021 - 15:00-15:45	Giovanni Villadoro	Informal discussion on perturbative expansions in field theory	Seminar
Nov 05, 2021 - 16:00-16:45	Andreas Ringwald	Exploring the Cosmic History with Gravitational Waves	Seminar					Video
Nov 08, 2021 - 12:00-13:00		Gong show: self-introduction of in-person participants	Introduction
Nov 08, 2021 - 16:00-16:20	Yonit Hochberg	Light Dark Matter	Talk					Video
Nov 08, 2021 - 16:20-16:40	Junwu Huang	Ultralight Dark Matter	Talk					Video
Nov 08, 2021 - 16:40-17:00	Eric Kuflik	Exotic and Heavy Dark Matter	Talk					Video
Nov 08, 2021 - 17:00-17:20	Alyson Brooks	Status of Dark Matter Small Scale Crisis	Talk					Video
Nov 08, 2021 - 17:20-18:00	Asimina Arvanitaki	Dark Matter Day Discussion Session	Discussion
Nov 09, 2021 - 16:00-16:20	Liantao Wang	Gravitational wave signals from an inflation triggered phase transition	Talk
Nov 09, 2021 - 16:20-16:40	Kfir Blum	Galactic structure and H0 from gravitational lensing	Talk					Video
Nov 09, 2021 - 16:40-17:00	Ben Safdi	X-rays as probes of axion physics	Talk					Video
Nov 09, 2021 - 17:00-18:00	David Curtin	Discussion Session	Discussion
Nov 10, 2021 - 16:00-16:20	Matthew McCullough	Cosmological approaches to EW fine-tuning	Talk					Video
Nov 10, 2021 - 16:20-16:40	Paolo Creminelli	Beyond perturbation theory in Inflation	Talk					Video
Nov 10, 2021 - 16:40-17:00	Xingang Chen	Primordial Features and non-Gaussianities	Talk					Video
Nov 10, 2021 - 17:00-18:00	Raffaele Tito D'Agnolo, Michael Geller, Raman Sundrum	Discussion Session	Discussion
Nov 11, 2021 - 12:00-13:00		Aperitivo and in person discussion	Discussion
Nov 11, 2021 - 14:30-14:50	Emanuele Castorina	Low and high redshift 21cm	Talk					Video
Nov 11, 2021 - 14:50-15:10	Julian Munoz	Neutrinos & light relics	Talk					Video
Nov 11, 2021 - 15:10-16:30	Cora Dvorkin and Julien Lesgourgues	Discussion Session	Discussion					Video
Nov 12, 2021 - 12:00-13:00		Aperitivo and in person discussion	Discussion
Nov 12, 2021 - 16:00-16:20	Géraldine Servant	Primordial GWs boosted by axions	Talk					Video
Nov 12, 2021 - 16:20-16:40	Masha Baryakhtar	GWs from compact objects	Talk					Video
Nov 12, 2021 - 16:40-17:00	Chiara Mingarelli	Pulsar Timing Arrays	Talk
Nov 12, 2021 - 17:00-18:00	Liang Dai and Pedro Schwaller	Discussion Session	Discussion