There is still a relevant lack of knowledge of the spectrum, phase diagram and processes mediated by the Strong Interaction. Throughout the world, there are large experimental collaborations like LHCb (CERN), Jefferson Lab (USA), BESS (China), Belle (Japan), FAIR (Germany in the future), etc. dedicated to the discovering of new states (tetraquarks, glueballs, exotics), the improvement of precision in different processes, or studying the Strong Interaction under extreme conditions of temperature and density. However, the fundamental theory, known as Quantum Chromodynamics (QCD), only allows for perturbative calculations at high energies, and in terms of quarks and gluons, which are confined within hadrons. In order to describe the latter, their interactions, classification and nature, non-perturbative techniques, globally known as Hadron Physics, are needed. Even the identification of new states from experiments requires such techniques. The groups included in the HADRON Spanish Excellence Network are deeply involved in the development of some of the Hadronic Physics most advanced techniques, namely: Effective Theories, dispersive approaches, lattice QCD, Regge Theory, or finite density and temperature formalisms. Still, not all the groups master all these techniques, whereas progress in the field requires the combination of different formalisms to keep up with the level of excellence. Hence, the purpose of this network is to facilitate the communication and foster the collaboration within different Spanish Hadron Physics groups, while consolidating the existing research programs. For this purpose, the network provides financial support to the members of the groups to meet in order to establish or consolidate collaborations, to organize seminars to present to one group the techniques developed and used by other groups, as well as to organize workshops to introduce all techniques, where members of all groups may participate, particularly the youngest ones.

The Scientific Goals specifically addressed by the network are grouped in two categories:

  • Fundamentals:
    • 1) Effective Field Theories
    • 2) Lattice
    • 3) Dispersive Techniques
  • Applications:
    • 1) Spectroscopy
    • 2) Electroweak interactions of Hadrons
    • 3) Hadronic matter and finite temperature
Hadrón Hadrón