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Precision calculations for future e+e– colliders: targets and tools

7–17 Jun 2022
CERN
Europe/Zurich timezone

TH secretariat

Session

Talks and discussions: multi-loop computational techniques

13 Jun 2022, 13:00
4/3-006 - TH Conference Room (CERN)

4/3-006 - TH Conference Room

CERN

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  1. 16. Latest IBP reduction techniques
    Tiziano Peraro (University of Bologna and INFN)
    13/06/2022, 13:00

    The talk will review the status and future prospects of IBP reduction techniques. The importance and impact of finite-field based calculations, analytic reconstruction, multivariate partial fractioning and syzygys should be discussed.

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  2. 17. Modern calculation techniques for multi-scale loop amplitudes
    Vasily Sotnikov (University of Zurich (UZH))
    13/06/2022, 14:00

    The talk will review modern techniques to compute multi-leg/loop amplitudes, as well as future prospects for applications in e+e- collisions. Analytic and numerical techniques will be compared.

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  3. 18. OpenLoops @ 2 loops
    Max Zoller (PSI)
    13/06/2022, 15:30

    The talk will discuss the status and future prospects for the numerical calculation of two-loop integrands and amplitudes with OpenLoops, focusing on applications to future e+e- colliders.

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  4. 19. Local unitarity: perspectives for future lepton colliders
    Valentin Hirschi (CERN)
    14/06/2022, 13:00

    The talk will discuss the status and future prospects of the Loop-Tree Duality approach for the calculation of higher-order corrections to cross sections relevant for future e+e- colliders (both for QCD and EW corrections).

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  5. 20. Integrand subtraction & numerical integration
    Charalampos Anastasiou
    14/06/2022, 14:00

    The talk will discuss the status and future prospects of integrand-subtraction methods to construct locally finite two-loop amplitudes, focusing on applications to future e+e- colliders.

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  6. 21. Analytic methods for multi-loop calculations
    Andreas von Manteuffel (Michigan State University)
    14/06/2022, 15:30

    The talk will discuss the recent calculations of EW corrections to Drell-Yan and of the four-loop form factor, highlighting how these calculations and the technology adopted can be exploited for multiloop computations at future lepton colliders.

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  7. 24. Numerical evaluation of QCD virtual corrections with top quarks in e+e- collisions
    Long Chen
    15/06/2022, 13:00

    The talk will discuss recent multi-loop calculations involving heavy quarks, highlighting how these calculations and the technology adopted can be exploited for multiloop computations at future e+e- colliders.

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  8. 23. TH colloquium
    15/06/2022, 14:00

    https://indico.cern.ch/event/1155782/

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  9. 22. Elliptic integrals
    Stefan Weinzierl (Universität Mainz)
    15/06/2022, 15:30

    The talk will discuss the current understanding of elliptic integrals and future prospects in the context of multiloop calculations for future e+e- colliders. The talk will cover both the aspect of the analytic calculation of this class of integrals as well as their numerical evaluation.

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  10. 25. Numerical calculations using pySecDec
    Vitalii Ivanovych Maheria, Vitalii Maheria
    16/06/2022, 13:00

    The talk will discuss recent multi-loop calculations with PySecDec, highlighting how these calculations and the technology adopted can be exploited for multiloop computations at future e+e- colliders (e.g. EW corrections and reactions involving quark masses).

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  11. 26. Feynman parametrization and numerical integration
    Janusz Gluza (University of Silesia (PL)), Janusz Gluza (U. Silesia)
    16/06/2022, 14:00

    The talk will discuss the status of the calculation of electroweak pseudo-observables, as well as the methodology to evaluate Feynman-parameter integrals numerically, with a focus on the Mellin-Barnes method. The prospects for future applications at future e+e- machines will be highlighted.

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  12. 27. Mixed QCD-EW corrections to neutral-current Drell-Yan
    Narayan Rana (INFN Milan)
    16/06/2022, 15:30

    The talk will discuss the recent calculations of QCD-EW corrections to Drell-Yan, highlighting how these calculations and the technology adopted can be exploited for multiloop computations at future lepton colliders.

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  13. 28. DiffExp and Feynman parameter integration
    Martijn Hidding (Uppsala University)
    17/06/2022, 13:00

    The talk will discuss the status and applications of the generalized power-series solution of differential equations (e.g. DiffExp, CAESAR), highlighting how this technology can be exploited for multiloop computations at future lepton colliders.

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  14. 29. The AMFlow approach
    Xiao Liu (University of Oxford)
    17/06/2022, 14:30

    The talk will discuss the status and applications of the AMFlow method to the calculation of IBP systems and the solution of differential equations for master integrals. The talk will highlight how this technology can be exploited for multiloop computations at future lepton colliders.

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  15. 30. Workshop wrap up
    17/06/2022, 15:30
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