Abstract: Particle colliders have been the workhorse tool for particle physics since they were invented over 60 years ago. Forward particles are those that are produced at colliders and then travel in a direction close to the beamline. For decades, forward particles were largely ignored, and all of the large detectors currently operating at colliders are blind to them. In the last few years, however, our understanding of the forward region has been transformed and we now know that this region contains a treasure trove of physics, including the most energetic neutrinos ever produced by humans, possible evidence for dark matter, milli-charged particles, and new forces, and a wealth of other valuable information. To capture some of this potential, the Forward Search Experiment (FASER) has been operating in the forward region of the Large Hadron Collider since 2022. FASER’s latest results will be described, along with lessons learned and their implications for the future of particle physics.
About Professor Jonathan Feng
Bio: Jonathan Feng is Distinguished Professor of Physics and Astronomy at UC Irvine. He holds degrees in physics and mathematics from Harvard, Cambridge, and Stanford. He joined the UC Irvine faculty in 2002 and became Professor and Chancellor’s Fellow in 2006. Jonathan works at the interface of particle physics, astroparticle physics, and cosmology with the goal of finding deep connections between our understanding of the Universe at the smallest and largest length scales. His research interests include new particles and forces, dark matter, collider physics, cosmic rays, supersymmetry, and extra dimensions. In addition to his theoretical work, since 2018, he has been the founding Co-Spokesperson of the FASER Collaboration at CERN, which has detected the highest energy neutrinos ever produced in a lab and is currently searching for new particles related to dark matter.
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