A multi-quark theoretical approach to ${}_{}{}^3{}_{}{}^{}\mathrm{He}$ and ${}_{}{}^4{}_{}{}^{}\mathrm{He}$ form factors based on the relativistic harmonic oscillator quark model is presented to reproduce those experimental data at large momentum transfers, which have not so far been explained in terms of ordinary nuclear physics.

NUCLEAR REACTIONS Calculated elastic electromagnetic form factors of ${}_{}{}^3{}_{}{}^{}\mathrm{He}$, ${}_{}{}^4{}_{}{}^{}\mathrm{He}$, $Q^2$ up to 3.5 and 2.5 ${(\mathrm{G}\mathrm{e}\mathrm{V}/\mathit{c})}^2$, respectively. Multiquark cluster effect.

• Received 29 May 1981

DOI:https://doi.org/10.1103/PhysRevC.25.2157