SCET Workshop 2022

Session

NNNLL and NNLO

21 Apr 2022, 09:00

University of Bern

35. The Drell-Yan $q_T$ Spectrum and Its Uncertainty at N$^3$LL$'$

Johannes Michel (MIT CTP)

21/04/2022, 09:00

We present state-of-the-art SCETlib predictions for the $W$ and $Z/\gamma^*$ transverse-momentum ($q_T$) distributions at the LHC at complete three-loop order in resummed perturbation theory (N$^3$LL$'$) and matched to available fixed order. We pay particular attention to the estimation of theory uncertainties via profile scale variations in such a way that perturbative uncertainties due to...

5. Di-lepton Rapidity Distribution in Drell-Yan Production at N3LO in QCD

Tongzhi Yang

21/04/2022, 09:30

The CERN Large Hadron Collider is a precision machine to test the Standard Model and demands equally precise theoretical predictions. State-of-the-art theory calculations at next-to-next-to-next-to-leading order (N3LO) in perturbative QCD are only available for a limited set of processes and observables. We compute for the first time the differential di-lepton rapidity distribution for the...

13. Next-to-next-to-leading order parton distribution functions using LCPT

Yair Mulian

21/04/2022, 10:00

We describe the perturbative calculation of the transverse parton distribution functions in the quark-quark channel up to next-to-next-to-leading order, based on the technique of light-cone perturbation theory. The computation consists of separate computation of Feynman diagrams, demonstrating the cancellation of both UV and IR light-cone divergences. The result serves as a check for a...

27. Analytic two-loop soft and beam functions for leading-jet p_T

Samuel Abreu (CERN)

21/04/2022, 14:00

We present the calculation of the two-loop soft and beam functions for the transverse-momentum distribution of the leading jet produced in association with any colour-singlet system (e.g. a Higgs or a Z boson). This constitutes a central ingredient for the resummation of the above distribution as well as the jet-vetoed cross section at the next-to-next-to-next-to-leading logarithmic order.

23. An automated framework to calculate jet and beam functions at NNLO (remote)

Marcel Wald (University of Siegen)

21/04/2022, 14:30

We present a novel formalism to calculate beam and jet functions automatically at next-to-next-to-leading order in perturbation theory. By employing suitable phase-space parameterisations in combination with sector-decomposition steps and selector functions, we managed to factorise all divergences in the phase-space integrations and we implemented our framework in the publicly available code...

4. Effective transverse momentum in multiple jet production at hadron colliders

Jürg Andreas Haag

21/04/2022, 15:00

We consider the class of inclusive hadron collider processes in which several energetic jets are produced, possibly accompanied by colourless particles (such as Higgs boson(s), vector boson(s) with their leptonic decays, and so forth).
We propose a new variable that smoothly captures the
$N+1$ to $N$-jet transition. This variable, that we dub $k_T^{\rm ness}$, represents an effective...

40. Differential Distributions beyond N3LO (remote)

Dr Gherardo Vita (SLAC)

21/04/2022, 15:30

In this talk I present upcoming results regarding resummation at 4 loops for differential distributions.