具有精确顶质量依赖的胶子聚变W/Z玻色子对产生的双环螺旋振幅

Proceedings of Loops and Legs in Quantum Field Theory — PoS(LL2022) Pub Date : 2022-10-20 DOI:10.22323/1.416.0030

Christian Brønnum-Hansen, Chen-Yu Wang

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引用次数: 3

摘要

我们计算了胶子聚变中壳上W / Z玻色子对产生的双环振幅中顶夸克的贡献，gg→WW和gg→ZZ。对顶夸克质量的精确依赖被保留，底夸克被认为是无质量的。对每个相空间点的积分进行数值化简，并用辅助质量流法求主积分。这允许快速计算振幅到非常高的精度。

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Two-loop helicity amplitudes for W/Z boson pair production in gluon fusion with exact top mass dependence

We compute the top quark contribution to the two-loop amplitudes for on-shell W / Z boson pair production in gluon fusion, gg → WW and gg → ZZ . Exact dependence on the top quark mass is retained, the bottom quark is considered massless. Integral reduction is performed numerically for each phase space point and the master integrals are evaluated using the auxiliary mass ﬂow method. This allows for fast computation of the amplitudes to very high precision.

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Proceedings of Loops and Legs in Quantum Field Theory — PoS(LL2022)

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