Loops and Legs in Quantum Field Theory

Session

Parallel 5

18 Apr 2024, 09:00

Philipp Melanchthon

Conveners

Parallel 5

• Johannes Bluemlein (Z_ZPPT (Zeuthen Particle PhysicsTheory))

Parallel 5

• Johannes Bluemlein (Z_ZPPT (Zeuthen Particle PhysicsTheory))

98. NNLO QCD corrections to semi-inclusive DIS

Narayan Rana (NISER)

18/04/2024, 09:00

In this talk, we present the NNLO QCD corrections to the semi-inclusive deep-inelastic scattering process. We use the state-of-the-art techniques namely, the method of reverse unitarity, IBP reduction and the method of differential equations to compute both virtual and phase-space integrals analytically.
After performing the mass-subtraction appropriately, we find the
finite partonic...

14. NNLO corrections to SIDIS coefficient functions

Leonardo Bonino (University of Zurich)

18/04/2024, 09:30

Hadron production in lepton-proton scattering (semi-inclusive deep inelastic scattering, SIDIS) probes the structure of hadrons at a higher level of detail than fully inclusive processes. A wealth of SIDIS data is available especially from fixed-target experiments. In this talk, we present the calculation of NNLO corrections to the full set of SIDIS coefficient functions and discuss their...

15. Higher Order Corrections in Polarized DIS

Ignacio Borsa (Tübingen University)

18/04/2024, 10:00

We present higher order corrections for jet observables in longitudinally polarized deep inelastic lepton-nucleon scattering. Specifically, we consider the cases of single-inclusive and di-jet production in DIS, mediated by both neutral and charged currents. We study the perturbative stability and phenomenological consequences of the QCD corrections for Electron-Ion Collider kinematics.

34. Evolution kernels of twist-two operators

Alexander Manashov (UNI/TH (Uni Hamburg, Institut fuer Theoretische Physik))

18/04/2024, 11:00

The evolution kernels that govern the scale dependence of the generalized parton distributions are invariant under transformations of the $SL(2,R)$
collinear subgroup of the conformal group. Beyond one loop the symmetry generators, due to quantum effects, differ from the canonical ones. We construct the transformation that brings the full symmetry generators back to their canonical form and...

67. Threshold parton distribution functions beyond leading power

Robert Szafron (Brookhaven National Laboratory)

18/04/2024, 11:30

The soft function that appears in threshold Drell-Yan or Higgs production contains infrared divergencies. This issue can be ignored at leading power without any significant impact on computations, which allowed the achievement of high logarithmic accuracy for threshold resummation. However, if we go beyond leading power in threshold expansion, the factorization of collinear modes inside the...

30. Anomalous dimensions of leading twist operators to four loops

Giulio Falcioni (University of Zuerich and University of Turin)

18/04/2024, 12:00

The anomalous dimensions of the twist-2 operators control the scale evolution of the Parton Distribution Functions. The precision targets set by the forthcoming experiments at the LHC and at the EIC require the calculation of the four-loop anomalous dimensions. I will describe a theoretical framework, based on the renormalisation of off-shell correlators, which allows to determine these...

103. Full and approximated NLO predictions for like-sign W-boson scattering at the LHC

Stefan Dittmaier (University of Freiburg)

18/04/2024, 12:30

The talk presents a new calculation of next-to-leading-order (NLO)
corrections of the strong and electroweak interactions to like-sign
W-boson scattering at the Large Hadron Collider, implemented in the
Monte Carlo integrator Bonsay. The calculation includes leptonic decays
of the W bosons and the whole tower of next-to-leading-order
contributions. Confirming an earlier NLO...