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SUMMARY:Chiral symmetry and its partial restoration in relativisitic mean 
 field\ntheory for finite nuclei
DTSTART;VALUE=DATE-TIME:20031204T140000Z
DTEND;VALUE=DATE-TIME:20031204T150000Z
DTSTAMP;VALUE=DATE-TIME:20261113T055821Z
UID:indico-event-1337@indico.ific.uv.es
DESCRIPTION:Chiral symmetry and its spontaneous breaking are important in 
 hadron physics due to the symmetry of the underling QCD theory for the bui
 lding blocks of hadrons. The chiral sigma model of Gell-Mann and Levy is k
 nown to provide good description of the pion nucleon interactions. We take
  the chiral sigma model for the description of nuclei using the relativist
 ic mean field framework with an extension to include the mass generation t
 erm for the omega meson as the nucleon. The direct application of the exte
 nded chiral sigma model provides too small spin-orbit splittings\, which a
 re essential for the quantitative description of finite nuclei. We introdu
 ce then the possibility of surface pion condensation in finite nuclei and 
 find that the mean field of pion becomes finite and provides a suitable am
 ount of additional energy difference between spin-orbit partners.[1\,2] Th
 e nucleon mass is reduced by about 20%\, which corresponds the amount of t
 he chiral symmetry restoration in finite nuclei.\n1. H. Toki\, S. Sugimoto
  and K. Ikeda\, Prog. Theor. Phys. 108 (2002) 903.\n2. Y. Ogawa\, H. Toki\
 , S. Tamenaga\, H. Shen\, A. Hosaka\, S. Sugimoto and K. Ikeda\, RCNP prep
 rint (2003).\n\nhttps://indico.ific.uv.es/event/1337/
LOCATION:Edf. Institutos de Investigación Sala Seminarios IFIC
URL:https://indico.ific.uv.es/event/1337/
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