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Heavy-quark-pair production at lepton colliders at NNNLO in QCD

Oct 27, 2022, 10:50 AM
25m
A511 (IHEP)

A511

IHEP

Talk QCD

Speaker

Xiang Chen (Peking University)

Description

We compute the total cross section of heavy-quark-pair production in 𝑒+𝑒− annihilation mediated by a virtual photon at the next-to-next-to-next-to-leading order (NNNLO) in Quantum Chromodynamics. The result is expressed as a piecewise function defined by several deeply expanded power series. The result significantly reduces the theoretical uncertainty. For example, for a collision energy of 500GeV, the scale dependence has been reduced from 0.72% at the next-to-next-to-leading order (NNLO) to 0.15% at the NNNLO, which meets the request by future lepton colliders.

Presentation materials