Conveners
Plenary 3
- Matthias Steinhauser (KIT)
Plenary 3
- Matthias Steinhauser (KIT)
The determination of the hot QCD pressure has a long history, and has – due to its phenomenological relevance in cosmology, astrophysics and heavy-ion collisions — spawned a number of important theoretical advances in perturbative thermal field theory applicable to equilibrium thermodynamics.
In particular, the long-standing infrared problem that obstructs the perturbative series has been...
The diagrammatic coaction underpins the analytic structure of Feynman integrals, their cuts and the differential equations they admit. The coaction maps any diagram into a tensor product of its pinches and cuts. These correspond respectively to differential forms defining master integrands, and integration contours which place a subset of the propagators on shell. In a canonical basis these...
In a recent work the discrepancy between the QCD perturbation series for the inclusive hadronic tau decay rate computed in the CIPT and FOPT approaches was suggested to be related to a different sensitivity of the two approaches to quartic momenta in the infrared limit. If we make the assumption that the known perturbative correctionsfor the QCD Adler function at the 5-loop level are already...
In this talk I will present the recent calculations in perturbative QCD to third order in $\alpha_s$ of the total rate of inclusive semileptonic $B$ decays and the relation between the $\overline{\mathrm{MS}}$ and the kinetic mass of the heavy quarks. Our results have led to a 34% uncertainty reduction in the value of inclusive $|V_{cb}|$. I will furthermore present the $\alpha^3$ correction...
In this talk, I present the first complete calculation of
form factors to four-loop order in massless QCD. Our results
for the qqA, ggH and bbH vertices confirm the predicted
structure of infrared poles and allow to extract the cusp
and collinear anomalous dimensions. Further, I will discuss
the calculation of three-loop amplitudes for quark and gluon
scattering. We verify predictions...
or "What becomes of vortices when they grow giant"
