The Cosmological Constant Problem

Ignacio Ruiz García will present 'The Cosmological Constant Problem' (Steven Weinberg, 1989; Rev.Mod.Phys. 61 (1989) 1-23):

Abstract: Astronomical observations indicate that the cosmological constant is many orders of magnitude smaller than estimated in modern theories of elementary particles. After a brief review of the history of this problem, five different approaches to its solution are described.