[SEMINARI]: Prof. Soni: THE NUCLEON AND THE NEUTRON STAR: Strong Interactions at all densities

[Arcadi Santamaria]

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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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                        THE NUCLEON AND THE NEUTRON STAR:
                       Strong Interactions at all densities

                              Prof. Vikram Soni

              (National Physical Laboratory, New Delhi, India)

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                     Aula de Seminaris de Física Teòrica
                 Tuesday 05 of December of 2000 at 12:30 PM
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                                    Resum

 At typical central densities of neutron stars (5 - 10 times nuclear density
 ) the nucleon is resolved and therefore composite.It is then unwise to use
  purely nucleonic or hadronic degres of freedom as has been custom. On the
    other hand, perturbative QCD applies at much higher density. We use a
    renormalizable effective Lagrangian , that is QCD coupled to a chiral
   multiplet ( pi , sigma) which can interpolate between all desities. It
  yields the nucleon as a quark soliton and also admits several interesting
 phases at high density. The ground state for the core of a neutron star is
found to be a pion condensate ( for 2 flavour matter ). This ground state is
 anisotropic and lines up the magnetic moments of the constituent quarks to
 dynamically yield strong magnetic fields of typical strength of those found
                                in pulsars.

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