Question:
In our discussion of the reaction e
++ e
μ
++ μ
, we completely neglected the Higgs exchange diagram of Figure 10.30, compared with the dominant diagrams of Figures 10.2(a) and (b). Since the Higgs contribution is obviously largest at E
CM= M
H, where the contributions of Figures 10.2(a) and (b) are expected to be comparable, justify this approximation by using the appropriate H
0branching ratios to estimate the total cross-section at E
CM= M
Hthat would arise from Figure 10.30 alone, and compare with estimates of the cross-sections which would arise from Figure 10.2(a) alone. Make the same comparisons of the contributions from Figure 10.2(a) alone and Figure 10.2(b) alone at E
CM= M
Z.
Figure 10.2
Figure 10.30
Transcribed Image Text:
e+ и" (a) и Z° e+ (b) Н°