Use (9.23) to show that the parton model predicts ((d σ)/(d x d y))e p →eX=(2 πα^2)/(Q^4) s[1+(1

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Understand the basic variables and the context of the problem. In deep inelastic scatter

Use (9.23) to show that the parton model predicts $$ \left(\frac{d \sigma}{d x d y}\right)_{e p \rightarrow \mathrm{eX}}=\frac{2 \pi \alpha^2}{Q^4} s\left[1+(1-y)^2\right] \sum_i e_i^2 x f_i(x) $$ if particle masses are neglected.