 With the aim of understanding the physical implications of the CSL model, such as the rate of suppression of coherence, we make now some simplifying assumptions. First, we assume that we are dealing with only one kind of particles (e.g., the nucleons), secondly, we disregard the standard Schrödinger term in the evolution and, finally, we divide the whole space in cells of volume \(d^3\). We denote by \(\ket{n_1, n_2 ,\ldots}\) a Fock state in which there are \(n_i\) particles in cell \(i\), and we consider a superposition of two states \(\ket{n_1, n_2 , \ldots}\) and \(\ket{m_1, m_2 , \ldots}\) which differ in the occupation numbers of the various cells of the universe. With these assumptions it is quite easy to prove that the rate of suppression of the coherence between the two states (so that the final state is one of the two and not their superposition) is governed by the quantity: 