"The future of collider physics: selected aspects"

• Beate Heinemann (DESY and University of Freiburg (Germany))

"Naturalness motivations for BSM physics"

• Anson Hook (University of Maryland)

"Status of flavor physics"

• Yuval Grossman (Cornell)

"Lepton Flavour in Colliders: status and prospects"

• Shikma Bressler (Weizmann Institute of Science (IL))

"Neutrino mass-mixing parameters, circa 2021"

• Eligio Lisi (INFN, Bari, Italy)

"Physics with Forward LHC Neutrino Detectors"

• Felix Kling (SLAC)

“Coherent elastic neutrino-nucleus scattering: status and prospects”

• Francesca Dordei (Universita e INFN, Cagliari (IT))

"Charting New Directions in the BSM Landscape with Neutrino Experiments"

• Ian Shoemaker (Virginia Tech)

"Indirect searches for dark matter"

• Tracy Slatyer

"New Techniques for Direct Detection of Light Dark Matter"

• Yonit Hochberg (Hebrew University)

"Dark matter bound states"

• Kalliopi Petraki (Sorbonne Université)

"Primordial black hole dark matter"

• Guillermo Ballesteros (IFT UAM-CSIC)

"Novel signatures of dark matter bound formation"

• Maxim Pospelov

"Looking for Imprints of Microphysics on Large Scale Structure"

• Chanda Prescod-Weinstein (University of New Hampshire)

"An even lighter QCD axion"

• Pablo Quilez Lasanta (DESY)

"Superconducting axion string and Cosmic axion background"

• Hitoshi Murayama (CERN - DG/CS)

"Solar Neutrinos: Is There a Future?"

• John Beacom (Ohio State University)

"Baryogenesis and Particle Oscillations"

• Seyda Ipek (University of Washington)

"Gravitational waves from the early Universe: challenges and opportunities"

• Djuna Croon (University of Sussex)

"Our Galactic Center: A Unique Laboratory for the Physics & Astrophysics of Black Holes"

• Andrea Ghez (University of California)

The proximity of our Galaxy's center presents a unique opportunity to study a galactic nucleus with orders of magnitude higher spatial resolution than can be brought to bear on any other galaxy. After more than a decade of diffraction-limited imaging on large ground-based telescopes, the case for a supermassive black hole at the Galactic center has gone from a possibility to a certainty, thanks to measurements of individual stellar orbits. The rapidity with which these stars move on small-scale orbits indicates a source of tremendous gravity and provides the best evidence that supermassive black holes, which confront and challenge our knowledge of fundamental physics, do exist in the Universe. This work was made possible through the use of speckle imaging techniques, which corrects for the blurring effects of the earth's atmosphere in post-processing and allowed the first diffraction-limited images to be produced with these large ground-based telescopes. Further progress in high-angular resolution imaging techniques on large, ground- based telescopes has resulted in the more sophisticated technology of adaptive optics, which corrects for these effects in real time. This has increased the power of imaging by an order of magnitude and permitted spectroscopic study at high resolution on these telescopes for the first time. With adaptive optics, high resolution studies of the Galactic center have shown that what happens near a supermassive back hole is quite different than what theoretical models have predicted, which changes many of our notions on how galaxies form and evolve over time. By continuing to push on the cutting-edge of high-resolution technology, we have been able to capture the orbital motions of stars with sufficient precision to test Einstein’s General theory of Relativity in a regime that has never been probed before.