The $1/n$ expansion in the Gross–Neveu model: Conformal bootstrap calculation of the exponent $1/\nu$ to the order $1/n^2$

The critical exponent $1/v$ (dimensions of temperature) in the $U_N$-symmetric Gross–Neveu model is calculated to the order $1/n^2$ ($n \equiv N \hbox {tr}\, 1$) for arbitrary dimension of space.