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In a recent propposal, the cosmological constant has been considered as as anew thermodynamical variable and its change is related to the radiationproduced by black holes. Using this consideration and by modelling theprimordial black holes as Schwarzschild-de Sitter holes,we have constrained thetotal mass of primordial black holes evaporated by now, giving an estimate ofthe order of 1.624x10^24 solar masses.

Constraint on the Mass of Primordial Black Holes from the Value of the Cosmological Constant