Marina Nielsen

• XIII Hadron Physics, AO.R

• Abstract

  Hadron Physics studies systems dominated by strong interactions. At high energies, the quark structure of hadrons shows up and perturbative techniques are allowed. In this regime the main theoretical tool of Hadron Physics is Quantum Chromodynamics (QCD), which allows the description of a large number of problems. At low energies, interactions are dominated by non-Abelian processes, the Q…

  Hadron Physics, AP.TEM

• Abstract

  Hadrons' physics studies systems dominated by strong interactions. At high energies, the quark structure of hadrons shows up and perturbative techniques are allowed. ln this regime the main theoretical tool of Hadron Physics is Quantum Chromodynamics (QCD), which allows the description of a large number of problems. At low energies, interactions are dominated by non-Abelian processes; the…

  Hadrons' physics, AP.TEM

(Only some records are available in English at this moment)

• Abstract

  The precise knowledge of fundamental Quantum Chromodynamics (QCD) parameters is essential to precision calculations in particle physics. Several of them can be determined through the sound theoretical description" of decays tau u → hadrons + nu_tau combined with experimental data obtained at LEP (CERN). In 2014, the group responsible for the ALEPH data published a re-analysis of the…

  Accurate QCD parameter determination, BP.PD

• Abstract

  The submitted project deals with understanding of intermediate energy nuclear physics which is dominated by hadron degrees of freedom. Since the quantum chroropdynamics (QCD) cannot be used for studies at intermediate energies, the idea is to use QCD inspired "effective field theories", which are based on the fact that the physics of the ground states of tight hadrons is governed by the s…

  Hadron dynamics at intermediate energies, BP.PD
• Study of the Width of Charmonium Exotic States Using the QCD Sum Rules, BP.DR

(Only some records are available in English at this moment)

• Abstract

  A remarkable feature of QCD is that the mass scale which controls color confinement and hadron mass scales does not appear explicitly in the QCDLagrangian. However, a mass scale can appear in the equations of motion without affecting the conformal invariance of the action if one adds a term to the Hamiltonian proportional to thespecial conformal operator. Applying the sameprocedure to the…

  Exotic states from an effective hadron dynamics from superconformal algebra, BE.PQ

• Abstract

  This project focuses on a theoretical framework for the study the XYZ charmonium and bottomoniumlike states which have been found by many experimental collaborations. More specifically, we will explore the three-body interactions by solving the Faddeev equations in order to look for poles which can be associated with bound states and/or resonances. Our main goal is to explain the new char…

  Study of the XYZ systems through three-body interactions using Faddeev equations, BE.EP.PD

• Abstract

  We plan to study states containing qq pairs of charmed or beauty quarks in addition to other pairs of qq . Such states are being found in present Laboratories, in the BABAR, CLEO, BES, BELLE collaborations, and will be also searched in the European FAIR facility in a few years. They are called X,Y,Z states and they challenge the standard structure of mesons as simple qq states. We have …

  Effective field theory approach to states in the hidden charm and hidden beauty sector, BE.EP.DR