25th European Conference on Few-Body Problems in Physics

Session

Monday Parallel Session: Lattice QCD and relativity (Linke Aula)

31 Jul 2023, 16:45

AudiMax (Alte Mensa)

Conveners

Monday Parallel Session: Lattice QCD and relativity (Linke Aula)

• Harvey Meyer

123. Going to the light front with contour deformations

Gernot Eichmann (University of Graz)

31/07/2023, 16:45

Invited Talk

I will discuss a new method to compute light-front wave functions and parton distributions using contour deformations. After solving the two-body Bethe-Salpeter equation of a scalar theory, the projection onto the light front is done through a combination of contour deformations and analytic continuation methods. The resulting light-front wave functions and distribution amplitudes are in...

4. Consistent currents in relativistic models of strongly interacting systems

Prof. Wayne Polyzou (Universityof Iowa)

31/07/2023, 17:10

Contributed Talk

We discuss a systematic method for constructing many-body electromagnetic current operators that are needed to ensure covariance and current conservation in phenomenological relativistic Hamiltonian models of
strongly interacting systems. The construction represents a general Hamiltonian in the Weyl representation. Momentum operators in this representation are replaced by gauge covariant...

92. The impact of quark many-body effects on exotic hadrons

Sachiko Takeuchi (Japan College of Social Work)

31/07/2023, 17:25

Contributed Talk

The constituent quark models successfully explain the features of the single hadrons. The hadron interactions are also well-reproduced. For example, the channel dependence of the short-range part of two-baryon interaction corresponds to those given by the Lattice QCD.

In this work, we investigate the exotic hadrons, ($q \bar q$)-($q \bar q$). The spin-dependent term of the one-gluon...

69. Influence of discretization error on the HALQCD baryon forces

Prof. Takashi Inoue (Nihon University College of Bioresource Sciences)

31/07/2023, 17:40

Contributed Talk

Baryon interactions, including nuclear force, are an essential component in nuclear physics especially in studies of few-body systems. There are already some useful phenomenological nuclear forces, thanks to a lot of experimental data. While, we suffer from uncertainty in hyperon interactions due to a lack of experimental data. In such case, it is very useful if we could derive baryon...

157. Two-body double pole and three-body bound states: physical and unphysical quark masses

Varese S. Timóteo (UNICAMP, Limeira, Brazil)

31/07/2023, 17:55

Contributed Talk

We solve the Faddeev bound-state equations for three particles with simple two-body nonlocal, separable po- tentials that yield a scattering length twice as large as a positive effective range, as indicated by some lattice QCD simulations. Neglecting shape parameters, the two-body bound state is a double pole. For bosons we obtain a cor- relation between three- and two-body energies. For...

130. Nucleon-nucleon interaction in manifestly Lorentz-invariant chiral effective field theory

Xiu-Lei Ren (Helmholtz-Institut Mainz)

31/07/2023, 18:10

Contributed Talk

We propose a systematic approach to study the nucleon-nucleon interaction by applying time-ordered perturbation theory (TOPT) to covariant chiral effective field theory. Diagrammatic rules of TOPT, for the first time, are worked out for particles with non-zero spin and interactions involving time derivatives. They can be applied to derive chiral potentials at any chiral order. The effective...