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Explore a novel theoretical framework for analyzing small black holes in string theory through this advanced physics seminar. Delve into the study of d+1 dimensional Euclidean Schwarzschild black holes operating at Hawking temperatures near the Hagedorn temperature, alongside Horowitz-Polchinski solutions. Learn how researchers overcome the challenges of strongly coupled worldsheet theories by leveraging underlying affine SU(2)_L × SU(2)_R symmetry to transition from strong to weak coupling regimes. Discover the mathematical technique of varying current algebra levels from small values relevant to black holes and HP solutions to large values that enable analytical treatment. Examine how this approach leads to a solvable effective field theory with connections to the non-abelian Thirring model. Investigate the fascinating properties of the resulting solutions and their significant implications for understanding the black hole/fundamental string transition, a fundamental question in theoretical physics and string theory.
