Equation of State for Neutron Matter in the Presence of a Pion Condensate

Weise, W.; Brown, G.E.

doi:10.1016/0370-2693(75)90658-9

Equation of State for Neutron Matter in the Presence of a Pion Condensate

W. Weise
(
- SUNY, Stony Brook
)
,
G.E. Brown
(
- SUNY, Stony Brook
)

1975

4 pages

Published in:

Phys.Lett.B 58 (1975) 300-303

Published: 1975

DOI:

10.1016/0370-2693(75)90658-9

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Abstract: (Elsevier)

The energy density for neutron matter including a pion condensed phase is studied, with particular emphasis on the role of Δ-isobars. Relativistic corrections to vertex functions involving isobars are considered and turn out to be important in the high density region. We arrive at a simple schematic model in which the inclusion of isobars leads to an effective enhancement of the axial vector coupling constant, which competes with an effective reduction due to the Lorentz-Lorenz correction. In the equation of state, inclusion of a pion condensed phase can lead to an appreciable reduction of total pressure.

N: MATTER
PI: CONDENSATE
NUCLEON RESONANCE
CORRECTION: VERTEX FUNCTION
COUPLING CONSTANT: AXIAL-VECTOR
CORRECTION: LORENTZ-LORENZ
OPTICS: DENSITY
FIELD THEORY: CRITICAL PHENOMENA