Celestial Amplitudes for Strings and Universal Structure of IR Divergences in Nonabelian Gauge Theory on the Celestial Sphere

Explore celestial amplitudes in string theory and the universal structure of infrared divergences in nonabelian gauge theory through this comprehensive physics lecture delivered by Francisco Rojas from Adolfo Ibáñez University at the Galileo Galilei Institute. Delve into advanced theoretical physics concepts as the speaker examines the mathematical framework connecting string theory amplitudes to celestial sphere representations, while investigating how infrared divergences manifest universally in nonabelian gauge theories when formulated on the celestial sphere. Gain insights into cutting-edge research at the intersection of string theory, gauge theory, and celestial holography, understanding how these mathematical structures reveal fundamental properties of quantum field theory and gravitational physics. Learn about the technical methods used to analyze scattering amplitudes in these contexts and discover how celestial sphere formulations provide new perspectives on long-standing problems in theoretical physics, particularly regarding the treatment of infrared behavior in gauge theories and the geometric interpretation of string amplitudes.