Critical exponents and transport properties near the QCD critical endpoint from the statistical bootstrap model

Abstract We present an estimate of the behavior shear and bulk viscosity coefficients when QCD critical point is approached from hadronic side, describing matter within statistical bootstrap model strong interactions. The shows near quark-hadron transition temperature if parameter characterizing degeneracy Hagedorn states properly chosen. calculate exponents amplitudes relevant thermodynamic quantities combine them with Ansatz for to derive these point. entropy density ratio found decrease increased, approach Kovtun–Son–Starinets bound $$1/(4\pi )$$ 1 / ( 4 π ) faster point, while coefficient rise very rapidly.