Loops and Legs in Quantum Field Theory

Session

Parallel 7

29 Apr 2022, 09:00

Raum Ettal

Conveners

Parallel 7

• Roberto Bonciani (Sapienza Universita' di Roma, Roma, Italy)

Parallel 7

• Roberto Bonciani (Sapienza Universita' di Roma, Roma, Italy)

89. Towards the automation of the Local Analytic Sector Subtraction

Sandro Uccirati (University of Turin)

29/04/2022, 09:00

78. Threshold resummation of new partonic channels at next-to-leading power

Leonardo Vernazza (INFN, Torino and University of Torino)

29/04/2022, 09:30

Collider observables involving heavy states are subject to large logarithmic terms near threshold, which must be summed to all orders in perturbation theory to obtain sensible results. Relatively recently, this resummation has been extended to next-to-leading power in the threshold variable, using diagrammatic and effective field theory techniques. In this talk I will present the state of the...

74. Recent progress in intersection theory for Feynman integrals decomposition.

Seva Chestnov (University of Padova)

29/04/2022, 10:00

High precision calculations in perturbative QFT often require evaluation of big collection of Feynman integrals. Complexity of this task can be greatly reduced via the usage of linear identities among Feynman integrals. Based on mathematical theory of intersection numbers, recently a new method for derivation of such identities and decomposition of Feynman integrals was introduced and applied...

27. Effective transverse momentum in multijet production at hadron colliders

Chiara Savoini

29/04/2022, 11:00

We consider the class of inclusive hadron collider processes in which one or more hard 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 ktness, represents an effective transverse momentum...

70. Antenna subtraction at NNLO with identified hadrons

Giovanni Stagnitto

29/04/2022, 11:30

Processes with identified hadrons require the introduction of fragmentation functions to describe the hadronisation of a quark or a gluon into the observed hadron particle. Such identified particles in the final state make the treatment of infrared divergences more subtle, because of additional collinear divergences to be handled. We extend the antenna subtraction method to include hadron...

31. Automating antenna subtraction in color space

Matteo Marcoli (University of Zurich (UZH))

29/04/2022, 12:00

In the past decade, antenna subtraction has been used to compute NNLO QCD corrections to a series of phenomenologically relevant processes. However, the application of this method proceeds in a process-dependent way, with each new calculation requiring a significant amount of work. Moreover, in the present formulation, the antenna subtraction method can not handle systematically incoherent...