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Galileo Galilei Institute

The purpose of this workshop is to bring together scientists with different backgrounds and expertise to discuss open problems, recent developments and future directions in axion physics, a field that is notoriously replete with interdisciplinary connections. The aim is to foster a fruitful cross breeding between different theoretical areas, with a focus on certain open issues in axion particle physics, astrophysics and cosmology. Quantitative assessments of the axion contribution to Cold Dark Matter (CDM) involve top-notch lattice simulations of non- perturbative QCD effects, as well as of the cosmic evolution of axionic topological defects. Astrophysical observations provide strong bounds on axion properties because stellar evolution would be affected by the existence of axions and, intriguingly, some excesses in star energy losses have been reported. Cosmological scenarios in which the PQ symmetry is broken before inflation foresee axions imprints in the CMB, while in post-inflationary scenarios axion miniclusters, with overdensities several orders of magnitude larger than the local density of CDM, are expected to form, and a reliable assessment of their properties is of utmost importance. From the experimental side, a blossoming of potentially game-changing ideas, with an exciting crossover from experimental particle physics to materials science and cutting-edge technologies is inspiring new methods for axion searches. Novel techniques have been put forth that, besides exploiting the axion- photon coupling, aim to reveal axions via their couplings to nucleons and electrons. The interaction between the experimental and theoretical communities will foster the merging of `how to search’ with `where to search’ into optimized strategies to hunt for the axion.

Physique des hautes énergies, des particules et des champs,    Métrologie et instrumentation

Galileo Galilei Institute For Theoretical Physics

Physique des hautes énergies, des particules et des champs,    Métrologie et instrumentation

INFN Pisa, Pisa University, Scuola Normale Superiore

To provide a cross-disciplinary overview and the main tools to work on some of the main aspects of astroparticle physics where quantum collective properties of matter play a crucial role.

Email.: isapp2023@lists.pi.infn.it

Properties of matter in neutron stars and GW emission, Multimessenger observations of neutron stars, Light dark matter candidates, Light dark matter around black hole and its gravitational signature, Simulation of gravity and GWs in Bose-Einstein condensates, Classical and quantum fluids in gravitational fields

Physique des hautes énergies, des particules et des champs,    Evénements multidisciplinaires en physique

This workshop will be co-organized by two main institutions, namely the University of Naples Federico II and the University of Durham.

This workshop aims to discuss the phenomenological implications of Primordial Black Holes (PBH), such as their possible relationship with dark matter origin, neutrino mass, the baryon asymmetry, inflation, their theoretical aspects and origin and the possible multi-messenger detection and the experimental state-of-the-art. Recently, the interest in PBHs from the physics community is growing because they can provide an alternative explanation of some of the major problems of the Standard Model. We know that Black Holes can merge or evaporate (according to the seminal paper by Hawking), generating gravitational waves, fluxes of Dark Matter, and standard model particles. Therefore, different experimental indirect searches can possible exploit the multi-messenger approach.

Email.: http://astro.dur.ac.uk/vam2023/

During the last decades, strong gravitational lensing has become a powerful tool that can be used to study astronomical objects with different physical scales. It has also proven to be a promising diagnostic that can help solve some of the most important problems in cosmology. We have now reached a critical time for strong gravitational lensing research, as forthcoming large-scale surveys (Euclid, the Roman Space Telescope, the Chinese Space Station Telescope and the Vera Rubin Observatory) will map the entire sky and increase the number of known gravitational lenses from a few hundred to about 100 000. At the same time, strong gravitational lenses with current and forthcoming instruments (e.g. ALMA, JWST, E-ELT, SKA-VLBI) will spatially resolve scales that are beyond the reach of telescopes for individual objects in the high-redshift Universe. These new data will revolutionise our understanding of dark matter and structure formation, and offer unprecedented cosmological applications. This strong gravitational lensing symposium will bring together observational and theoretical members of the community to review their preparedness for this new era, to discuss advanced statistical techniques and possible systematics limitations, and to foster novel collaborations.

SOC chair;     Email.: stacey@mpa-garching.mpg.de

The Domoschool 2023 edition wants to focus on these issues: one of the most debated current topics in the scientific environment concerns the dynamics of galaxies. The problem concerns both the cosmological scales, given that the galaxies appear to move away from each other with increasing acceleration, and the galactic scales since the gases that form the surrounding halo appear to rotate around each galaxy at a much greater speed than predicted by the Newton's theory of gravitation.

Event Secretariat;     Tél.: [+39 388 984 3952];     Email.: domoschool@arsunivco.eu

Dark matter, MOND, Einstein's equations, gluing theorems

Physique mathématique,    Géométrie et topologie

The workshop will gather a small group of experts to discuss recent results on extensions, solutions and applications of supergravity theories to black holes, ads/cft, string phenomenology and cosmology.

The goal of this meeting is to discuss and consolidate recent advances in the vibrant research fields of string theory, holography, black hole physics, and cosmology. We will address important open problems through an active program of talks by well recognized scientific leaders in the field. In addition, we will organize an open discussion forum for researchers with close ties to the countries from the Balkan region and other parts of Eastern Europe in which we plan to brainstorm about future activities of the existing SEENET-MTP network, and other networking collaborations that will enhance the development of fundamental theoretical physics in these countries.