Use the finite-temperature propagators of Section 8.10 for fermions for the single-loop diagram shown in Figure 8.19,
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Use the finite-temperature propagators of Section 8.10 for fermions for the single-loop diagram shown in Figure 8.19, and show that you obtain the same Lindhard formula (8.11.10).
Actually, a two-external-leg diagram can also be viewed as a loop, as illustrated in Figure 8.22, if we view the departing particle as the same particle as the incoming particle.
Transcribed Image Text:
ΠΔΕ = – ΣΙΔ P || -Σ P Ñ₁ ΔΕ + Ep – Ep+ Δk + i€ Ε; + N₂-N₂+Ak - ΔΕ + E; – Ep+Δk + i + Ñ₁+Ak –ΔΕ + Ep+Δk - Εp - it i€ (8.11.10)
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agators is The loop diagram of Figure 819 in the book using the finitetempera...View the full answer
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