Issue
EPL
Volume 87, Number 6, September 2009
Article Number 61001
Number of page(s) 6
Section The Physics of Elementary Particles and Fields
DOI http://dx.doi.org/10.1209/0295-5075/87/61001
Published online 01 October 2009
EPL, 87 (2009) 61001
DOI: 10.1209/0295-5075/87/61001

Some peculiarities in response to filling up the Fermi sphere with quarks

S. V. Molodtsov1, 2, A. N. Sissakian1 and G. M. Zinovjev3

1   Joint Institute for Nuclear Research - 141980 Dubna, Moscow Region, Russia
2   Institute of Theoretical and Experimental Physics - 117259, Moscow, Russia
3   Bogolyubov Institute for Theoretical Physics, National Academy of Sciences of Ukraine UA-03680, Kiev-143, Ukraine

Gennady.Zinovjev@cern.ch

received 8 May 2009; accepted in final form 4 September 2009; published September 2009
published online 1 October 2009

Abstract
Considering quarks as the quasi-particles of the model Hamiltonian with four-fermion interaction we study response to the process of filling up the Fermi sphere with quarks, calculate the vacuum pressure and demonstrate the existence of filled-in state degenerate with the vacuum one.

PACS
11.10.-z - Field theory.
11.15.Tk - Other nonperturbative techniques.

© EPLA 2009