sentences:  In such a scenario, the Lambda slides into the center of the nucleus (it is not a proton or a neutron, and thus is not affected by the Pauli exclusion principle), and it binds the nucleus more tightly together due to its interaction via the strong force.In a lithium isotope (Λ7Li), it made the nucleus 19% smaller.Lambda baryons are usually represented by the symbols , , , and .