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9 lines
504 B
9 lines
504 B
\midheading{$g(-p_1)+g(-p_2) \to \gamma(p_3)+\gamma(p_4)$, (top loops at LO)}
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This process calculable at leading LO and next-to-leading order NLO.
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This process computes the contribution of quark loops ($n_f = 5$ light
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quarks and top quarks) to the process $gg \to \gamma\gamma$. It is
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calculable at leading LO and next-to-leading order NLO, although the
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effect of top-quark loops are only included at LO. The calculation
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and a phenomenological analysis are described in
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Ref.~\cite{Campbell:2016yrh}.
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