[SEMINARI]: Dr. Oller: Chiral Perturbation Theory at Finite Density

[Arcadi Santamaria Luna]

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                              S E M I N A R I

             [Image]   Departament de Física Teòrica    [Image]
                          Universitat de València
                       Institut de Física Corpuscular
                       Universitat de València - CSIC

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                  `Chiral Perturbation Theory at Finite Density'

                             Jose Antonio Oller

                    (Forschungszentrum Juelich, Alemania)

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                              Seminari del IFIC
                   Tuesday 03 of July of 2001 at 12:30 PM
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                                    Resum

  The effective chiral SU(2) Lagrangians with external sources are given in
      the presence of non-vanishing nucleon density by working out the
      contributions from the chiral \pi N Lagrangians. As a by product,
 many-particle quantum field theory at zero temperature is directly derived
   from relativistic quantum field theory. As applications of the previous
    formalism we will calculate up to an including next-to-leading order
      in-medium: quark condensates, pion propagation, vector-axial and
     pseudoscalar pion transition amplitudes, pi^0->\gamma \gamma, pion
 scattering and discuss the range of validity of the perturbative expansion.
 The inclusion in the effective field theory of two or more nucleon contact
           interactions is beyond the scope of the present work.

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