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SUMMARY:#StudentSeminar: Pion electro- and photoproduction on nucleons in 
 a covariant Chiral Perturbation Theory
DTSTART;VALUE=DATE-TIME:20210429T130000Z
DTEND;VALUE=DATE-TIME:20210429T140000Z
DTSTAMP;VALUE=DATE-TIME:20260429T095200Z
UID:indico-event-6236@indico.ific.uv.es
DESCRIPTION:I review some recent studies made on pion electro- and photopr
 oduction off nucleons close to threshold within a relativistic Chiral Pert
 urbation Theory\, the effective field theory of hadrons at low energies ba
 sed on the symmetries of QCD.\n\nWe observe that \\Delta(1232) degrees o
 f freedom in the model improves the global agreement with experimental dat
 a for the neutral pion production channel. The charged pion channels has b
 een found to be dominated by the nucleon sector. Furthermore\, I implement
  a fitting procedure for the relevant parameters of the model\, allowing u
 s to explore kinematical regions for different observables that should be 
 unsolved in QCD.\n\nMoreover\, we have found a best conciliation near thre
 shold pion production with some other parameters that were fixed by other 
 processes\, like pion-nucleon scattering\, when we consider the isospin br
 eaking at the one-loop amplitudes. We reproduce accordingly the angular di
 stributions and the energy dependence up to ~60 MeV above the threshold fo
 r all the observables.\n\nFinally\, I will show some applications of these
  studies incorporated in other precision processes  involving neutrino-nu
 cleon interactions or pion photoproduction on nucleus.\n\nhttps://indico.i
 fic.uv.es/event/6236/
LOCATION:Universe
URL:https://indico.ific.uv.es/event/6236/
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