  In this paper, we study the existence of ground state solutions to the
following p-Laplacian equation in some dimension $N\geq3$ with an $L^2$
constraint: \begin{equation*} \begin{cases} -\Delta_{p}u+{\vert
u\vert}^{p-2}u=f(u)-\mu u \quad \text{ in } \mathbb{R}^N,\\ {\Vert
u\Vert}^2_{L^2(\mathbb{R}^N)}=m,\\ u\in W^{1,p}(\mathbb{R}^N)\cap
L^2(\mathbb{R}^N), \end{cases} \end{equation*} where $-\Delta_{p}u=div\left(
{\vert\nabla u\vert}^{p-2}\nabla u \right)$, $2\leq p<N$, $f\in
C(\mathbb{R},\mathbb{R})$, $m>0$, $\mu\in\mathbb{R}$ will appear as a Lagrange
multiplier and the continuous nonlinearity $f$ satisfies mass supercritical
conditions. We mainly study the behavior of ground state energy $E_m$ with
$m>0$ changing within a certain range and aim at extending nonlinear scalar
field equation when $p=2$ and reducing the constraint condition of nonlinearity
$f$.
