Write down a reaction by which a K+ can be produced in a proton-proton collision and give the quark content of each particle involved. Conservation of energy, charge, baryon number, lepton number, strangeness and isospin How do I go about doing this? it has already given the p + p -> K+ reaction, im guessing I have to determine the other products that will allow conservation of the laws above? Do I just pick random particles, put them into the RHS of the equation and see if they obey conservations? Thanks for any help on this.