[seminar] Seminar FO - Feinberg

[hbuljan at phy.hr]

Poštovani kolege,

u četvrtak popodne seminar će nam održati Prof. Joshua
Feinberg iz Haife. Naslov seminara jest "Stable Fermion Bag
Solitons in the Massive Gross-Neveu Model: Inverse Scattering
Analysis" a sažetak možete pročitati u nastavku poruke.

Srdačan pozdrav,
Hrvoje Buljan

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SEMINAR FIZIČKOG ODSJEKA
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Vrijeme:   četvrtak, 27. 09. 2007., 14:15 sati (točno)
Mjesto:     Fizički odsjek, Bijenička c. 32, predavaonica F102


       Stable Fermion Bag Solitons in the Massive
     Gross-Neveu Model: Inverse Scattering Analysis

               Prof. Dr. Joshua Feinberg
        Department of Physics, Technion –
     Israel Institute of Technology, Haifa, Israel
   Department of Physics, Oranim – University of Haifa,
                     Tivon, Israel


Formation of fermion bag solitons is an important paradigm in the theory
of hadron structure. We study this phenomenon non-perturbatively in the
1+1 dimensional Massive Gross-Neveu model, in the large $N$ limit. We
find, applying inverse scattering techniques, that the extremal static bag
configurations are reflectionless, as in the massless Gross-Neveu model.
This adds to existing results of variational calculations, which used
reflectionless bag profiles as trial configurations. Only reflectionless
trial configurations which support a single pair of charge-conjugate bound
states of the associated Dirac equation were used in those calculations,
whereas the results in the present paper hold for bag configurations which
support an arbitrary number of such pairs. We compute the masses of these
multi-bound state solitons, and prove that only bag configurations which
bear a single pair of bound states are stable. Each one of these
configurations gives rise to an O(2N) antisymmetric tensor multiplet of
soliton states, as in the massless Gross-Neveu model.

					Voditelj seminara FO
					Hrvoje Buljan, hbuljan at phy.hr

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