clc;
clear;
disp('Ex-14.8');          //theoretical
printf('The reaction can be rewritten as follows U1+U--->S+S1. which implies that U and U1 annihiliate creating S and S1\n');
disp('The pi+ has the quark composition Ud1.Since no quarks are present in the final state. One possible way to get rid of the quarks is to change U into d');
printf('U--->d+W(+). Hence the remaining processes are d+d(+)--->energy and \n W(+)--->u(+) and vu.');