Interaction between an Electron and a Quark Down

The paper briefly studies the interaction between an electron and a down quark, considered integrated within a proton. It is therefore assumed that there is a down quark within a proton in which there are also two quarks up and an accelerated electron capable of penetrating the down quark inside the proton, in extremely difficult conditions in which the proton is already accelerated to a certain level necessary to start the nuclear fusion reaction between two hydrogen protons, in which case a proton already has high kinetic energy, moving at a very high linear velocity and having an extremely small size. Under these conditions, the possibility is studied for an electron to penetrate the proton, or more precisely to be able to interact (to be able to join) the down quark. It determines the kinetic energy required for the electron to achieve a goal like this.