Critical exponents from seven-loop strong-couplingφ4theory in three dimensions

Hagen Kleinert
1999 Physical Review D, Particles and fields  
Using strong-coupling quantum field theory we calculate highly accurate critical exponents nu, eta from new seven-loop expansions in three dimensions. Our theoretical value for the critical exponent alpha of the specific heat near the lambda-point of superfluid helium is alpha =-0.01294+-0.00060, in excellent agreement with the space shuttle experimental value alpha =-0.01285+-0.00038.
doi:10.1103/physrevd.60.085001 fatcat:otllszg4p5cntjyjnx5pft7y5a