Relativistically covariant calculation of hyperon formfactors

Electroweak formfactors are calculated using a Lorentz invariant formalism based on boosted bag-model. The Lorentz-invariance is explicitly demonstrated. Only one version of the formalism can be consistent with the conserved vector current (CVC) constraint. Some connections with the quasi-potential formalism are discussed. Difficulties encountered in the usage of the chiral-bag model are described. The results are compared with the earlier bag model calculations for semileptonic weak decays.