INTERNATIONAL WORKSHOP ON
RELATIVISTIC DESCRIPTION OF TWO- AND THREE-BODY SYSTEMS
IN NUCLEAR PHYSICS

LIST OF TOPICS

• Approaches relying on or inspired by field theory for reducing the 4D Bethe-Salpeter Equation to a 3D problem
• New techniques for solving the Bethe-Salpeter Equation with both bosonic and fermionic degrees of freedom
• Methods for obtaining accurate numerical solutions (numerical techniques, applied approximations etc)
• Extending relativistic approaches to higher number of constituents and to different fields
• Comparisons with experimental data and present challenges

SCIENTIFIC MOTIVATION

In the last few years, the study of few-nucleon systems in the framework of non relativistic quantum mechanics has reached a high level of accuracy. However, a number of relevant disagreements with the experimental results still remains to be solved, which are considered to be originated in part from the non relativistic treatment. Therefore, recently there has been a growing interest in elaborating a relativistic description of few-body systems, as shown by the appearance of new powerful approaches and the continuous developments of well-established techniques, with the consequent extension of the realm of applications. This fact, together with the high level of accuracy that can be reached nowadays in the solution of few-body problems, should make feasible the application of the various relativistic techniques to realistic two- and three-body problems, with the possibility of treating dynamically both nucleonic and pionic degrees of freedom. Among the different approaches which recently have received more attention, we can mention i) the Bethe-Salpeter Equation and ii) three dimensional reductions of the Bethe-Salpeter Equation, like, e.g. the Spectator Equation or the Light-Front projection. These studies could be of particular interest for the planned experimental activity in the near future from such facilities as JLAB (with the planned upgrade to 12 GeV), GSI and JPARC.

AIM OF THE WORKSHOP

The aim of the proposed Workshop is to bring together experts of both relativistic and non relativistic areas, in order to stimulate new investigations and to propose applications through detailed discussions of different approaches for implementing relativity in the description of two- and three-body systems. There is another very actual aim: we would like to give the opportunity for establishing collaborations between experts of accurate calculations of few-body systems and experts in the relativistic treatments, in order to possibly boost non relativistic approaches towards relativistic frameworks. The proposed activity will be carried out in a lively workshop atmosphere, with detailed presentations (in particular, encouraging young people to give as many oral contributions as possible) and enough time devoted to informal discussions. It should also provide a fruitful environment especially for younger colleagues to learn and get trained in performing such studies. Last but not least, contributions from experts of other fields, where the Bethe-Salpeter Equation plays a relevant role, will be programmed.

SUPPORT

The workshop has no registration fee. The ECT* will not cover travel expenses but could support up to 70% of the local expenses for a standard accommodation, i.e. "double room + lunch and dinner". An extra amount of ~20 euro/day should be paid for a single room accommodation. Organizers encourage Collegues to maximize the financial support from Home Institutions, in order to make available funds for inviting the largest number of Junior Researchers.

PROGRAMME