Conveners
Tuesday Morning A
- Carsten Schneider (RISC, Johannes Kepler University Linz)
Tuesday Morning A
- Carsten Schneider (RISC, Johannes Kepler University Linz)
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Andreas von Manteuffel (Michigan State University)9/10/19, 9:00 AM
In this talk I will discuss new algorithmic approaches to reduce Feynman integrals. Syzygies derived in the Lee-Pomeransky and the Baikov representation allow to find linear relations, which avoid the introduction of either irreducible numerators or higher powers of propagators, respectively. The relevant syzygies can be calculated with linear algebra methods based on finite fields. These...
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Jos Vermaseren9/10/19, 9:30 AM
As part of a project to derive parametric reduction schemes automatically a
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systematic search has been set up to determine 'good sets of variables'. It
turns out that both the ease of derivation of a scheme and its efficiency
depend very sensitively on the choice of variables. For some topologies
there can be thousands of such choices. I report here on this search and
the resulting... -
Vasily Sotnikov (University of Freiburg)9/10/19, 10:00 AM
We present the analytic form of all two-loop five-parton helicity amplitudes required for the calculation of NNLO QCD corrections to the production of three jets at hadron colliders in the leading-color approximation. The results are analytically reconstructed from exact numerical evaluations over finite fields. We employ a number of physics-motivated ideas to facilitate the reconstruction, as...
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Franz Herzog (Nikhef)9/10/19, 11:00 AM
The R*-method is a powerful tool to calculate anomalous dimensions of local QFTs. I will present new results which have been obtained with the method, such as the first few Mellin moments of splitting functions at N4LO, which also allowed us to obtain a first numerical estimate of the cusp anomalous dimension at five loops, and a calculation of the anomalous dimension of Weinberg's...
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Mr Amlan Chakraborty (The Institute of Mathematical Sciences, HBNI, Taramani, Chennai-600113, India)9/10/19, 11:30 AM
In this talk, we present a detailed study on the infrared structure of N=4 SYM and its connection to QCD. Calculation of collinear splitting functions helps to understand the structure and thus one can get infrared safe cross sections. We also demonstrate the factorization property that soft plus virtual part of the cross section satisfies and through factorization, we calculate soft...
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Rene Poncelet (Cambridge University)9/10/19, 12:00 PM
Precise predictions for total and differential cross sections
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at hadron colliders became an important corner stone of the LHC physics.
The lack of new 'smoking-gun' physics signals
requires precise comparisons between measurements and Standard Model
predictions to get a
handle on new physics effects. Tremendous efforts have been made to push
perturbative calculations to higher orders...