4. Draw one tree-level, lowest-order Feynman diagram corresponding to the dominant force for each of the following Standard Model processes. Use only fundamental particles, label them, and clearly indicate which particles are in the initial state and which are in the final state. Show all spectator quarks. NB the notation X(919293) indicates that a hadron 'X' is composed of valence quarks with flavours 9₁, 92 and 93 respectively. 1. 7+ + 7¯ → et + e¯ (at a centre of mass energy of 90 GeV) T 2. et +eV, +, (at a centre of mass energy of 5 GeV) 3. A+(uud) →n + π (ud) 4. +(uus)p+nº

4. Draw one tree-level, lowest-order Feynman diagram corresponding to the dominant force for each of the following Standard Model processes. Use only fundamental particles, label them, and clearly indicate which particles are in the initial state and which are in the final state. Show all spectator quarks. NB the notation X(919293) indicates that a hadron 'X' is composed of valence quarks with flavours 9₁, 92 and 93 respectively. 1. 7+ + 7¯ → et + e¯ (at a centre of mass energy of 90 GeV) T 2. et +eV, +, (at a centre of mass energy of 5 GeV) 3. A+(uud) →n + π (ud) 4. +(uus)p+nº