  The $p{}^4He$ elastic scattering at the energy range from 0.695 to 393 GeV is
analyzed in the framework of the Glauber theory. The Glauber amplitudes were
evaluated using isospin-averaged nucleon-nucleon amplitudes and the ${}^4He$
wave function as a superposition of the Gaussian functions. The values of the
calculated differential cross sections usually exceed the experimental ones. In
order to overcome the discrepancy, it is assumed following to the paper by L.G.
Dakno and N.N. Nikolaev (Nucl. Phys. {\bf A436} (1985) 653) that the ground
state wave function of ${}^4He$ has an admixture of a twelve quark bag.
Neglecting all transition amplitudes, the proton - 12q bag scattering amplitude
was chosen in a simple gaussian form. The inclusion of the 12q bag leads to
decreasing the $p{}^4He$ differential cross section and to a shift of the dip
position to a large values of $t$ what is needed for a successful description
of the experimental data. While fitting the data it is found that the weight of
the 12q bag state in the ground state of the ${}^4He$ nucleus is $\sim 10.5$%,
$\sigma ^{tot}_{p-12q}\sim 34$ mb, and the slope parameter of the $p-12q$ bag
elastic scattering is $\sim$ 23 (GeV/c)$^{-2}$. Inelastic shadowing is not
taken into account at the calculations.
