"Amplitude Analysis for Hadron Spectroscopy"
Dr. César Fernández-Ramírez, Jefferson Lab
The comprehensive understanding of the strong interaction in the
hadronic energy range is one of the open problems in particle and nuclear
physics. Problems such as how quarks and gluons aggregate to constitute
hadrons, hadrons spectroscopy, the role of chiral symmetry breaking, and
confinement have triggered a huge experimental and theoretical effort which
is exemplified by the amount of resources poured into this field in the form
of experimental facilities (i.e. Jefferson Lab, COMPASS@CERN, LHCb@CERN,
PANDA@FAIR, MAMI@Mainz) starting an exciting period in hadron spectroscopy.
The analysis of these data requires theoretical input in the form of
amplitudes that describe the reactions and allow to extract said resonances
(which show up as poles in unphysical Riemann sheets). In this seminar I
will show some of the techniques employed in amplitude analysis and examples
on the ongoing program at the Joint Jefferson Lab/Indiana University Physics
Analysis Center to provide such amplitudes to the experimental
collaborations.