Dr. Jingyu Luo will present his topic, “Expanding the lifetime frontier of particle physics with CMS,” in-person.

Abstract:

Despite the remarkable successes of the standard model (SM) of particle physics, profound mysteries of nature persist, including the nature of dark matter, the stability of the electroweak hierarchy, the origin of neutrino masses, and the origin of matter-antimatter asymmetry. These enduring questions call for a deeper understanding of the universe’s fundamental structure beyond the SM. Over the past decade, there has been a paradigm shift in the search for new physics at the LHC, with increasing focus on long-lived particles (LLPs) that have macroscopic lifetimes. Addressing the challenges of LLP searches demands innovations at every level of our experimental techniques, including data acquisition, reconstruction, machine learning, and detector technologies.

In this colloquium, I will discuss the recent breakthroughs in search for LLPs using displaced jets at the CMS experiment. These advancements have led to orders-of-magnitude improvements in our ability to probe challenging LLP signatures, representing a significant step forward in exploring the landscape of exotic LLPs. Built upon these breakthroughs, many more new applications and developments are expected in the next few years with the full Run-3 data set, as well as in the next decade with the High-Luminosity LHC upgrade. Further orders-of-magnitude improvements are foreseen with these explorations for a large variety of new physics scenarios, which will lead to a rich physics program and provide powerful tools to address the most pressing questions in fundamental physics.