Non-Perturbative QFT in Euclidean and Minkowski

Session

Bound states of confined 'constituents'

12 Sept 2019, 09:00

E10.B

11. Baryon Transition Form factors: from the spacelike to the timelike region

Teresa Peña

12/09/2019, 09:00

Wait to be defined by the speaker.

8. Bethe-Salpeter equation with spin dof

Giovanni Salme' (INFN - National Institute for Nuclear Physics)

12/09/2019, 09:50

A survey of the challenges in solving the ladder Bethe-Salpeter equation with spin dof, within an approach able to be played directly in Minokowski space, is presented. The interesting features of the light-front distributions for both two-fermion and fermion-scalar bound systems are discussed in view of possible correlations with the underlying dynamical interaction.

22. Pion GPD from light-front wave functions and DGLAP evolution

Prof. José Rodriguez Quintero (Universidad de Huelva)

12/09/2019, 11:00

We shall report on the model building of the pion GPD, within the DGLAP kinematic region, through the overlap of light-front wave functions. The wave functions can be modelled on the basis of the so-called Nakanishi representation and brought to make contact with realistic solutions of the Bethe-Salpeter equation. Then, we will capitalise on a new type of process-independent QCD charge to...

15. Spectral information from T>0 lattice QCD and in-medium quarkonium

Dr Alexander Rothkopf (University of Stavanger)

12/09/2019, 13:30

The extraction of spectral functions from Euclidean correlator data, simulated non-perturbatively at finite temperature, using first principles lattice QCD is a central challenge of modern high energy nuclear physics. In this talk I will first discuss different theoretical approaches, currently deployed to attack this problem, before showcasing recent progress and outstanding challenges in the...

1. Analytic structure of scattering amplitudes

Gernot Eichmann (University of Lisbon)

12/09/2019, 14:20

We calculate the onshell 2 → 2 scattering amplitude in a scalar model to exemplify the use of contour deformations when solving Lorentz-invariant integral equations. The integrals produce branch cuts in the complex plane of the integrand which prohibit a naive Euclidean integration path. By employing contour deformations, we can also access the kinematical regions associated with the...

2. Distributions of Quarks and Gluons in the Pion and Kaon

Ian C. Cloet

12/09/2019, 15:30

The pion and kaon occupy a special place in QCD as they are bound-states of a dressed-quark and a dressed-antiquark, but would also be massless in the chiral-limit because of dynamical chiral symmetry breaking (DCSB) in QCD. The structure of these Nambu-Goldstone bosons is therefore intimately tied to key questions in QCD, such as, the origin of hadron masses and color confinement. This talk...