Calculation of the threshold for π- condensation in neutron matter

S. O. Bäckman; W. Weise

doi:10.1016/0370-2693(75)90171-9

Calculation of the threshold for π^- condensation in neutron matter

S. O. Bäckman, W. Weise

SUNY

Research output: Contribution to journal › Article › peer-review

47 Scopus citations

Abstract

The threshold conditions for a phase transition to a negative pion condensate in neutron matter are studied. In the nucleon-nucleon particle-hole interaction it is essential to take into account the off-diagonality of the nucleon-nucleon interaction due to finite π^- meson momentum. A reaction matrix calculated from the Reid soft core potential is used. Allowing the Δ isobar to enter as an intermediate particle in the polarisation bubbles of the curent-current correlation function and including s-wave pion-nucleon interactions, we obtain a critical density around two times normal nuclear matter density.

Original language	English
Pages (from-to)	1-5
Number of pages	5
Journal	Physics Letters B
Volume	55
Issue number	1
DOIs	https://doi.org/10.1016/0370-2693(75)90171-9
State	Published - 20 Jan 1975
Externally published	Yes

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10.1016/0370-2693(75)90171-9

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title = "Calculation of the threshold for π- condensation in neutron matter",

abstract = "The threshold conditions for a phase transition to a negative pion condensate in neutron matter are studied. In the nucleon-nucleon particle-hole interaction it is essential to take into account the off-diagonality of the nucleon-nucleon interaction due to finite π- meson momentum. A reaction matrix calculated from the Reid soft core potential is used. Allowing the Δ isobar to enter as an intermediate particle in the polarisation bubbles of the curent-current correlation function and including s-wave pion-nucleon interactions, we obtain a critical density around two times normal nuclear matter density.",

author = "B{\"a}ckman, {S. O.} and W. Weise",

note = "Funding Information: * Work supported by A.E.C. Contract AT(11-1 )3001 ; on Leave from Abo Akademi, 20500 Abo 50, Finland. ** Supported by Deutsche Forschungsgemeinschaft; on leave from University of Erlangen, W. Germany.",

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T1 - Calculation of the threshold for π- condensation in neutron matter

AU - Bäckman, S. O.

AU - Weise, W.

N1 - Funding Information: * Work supported by A.E.C. Contract AT(11-1 )3001 ; on Leave from Abo Akademi, 20500 Abo 50, Finland. ** Supported by Deutsche Forschungsgemeinschaft; on leave from University of Erlangen, W. Germany.

PY - 1975/1/20

Y1 - 1975/1/20

N2 - The threshold conditions for a phase transition to a negative pion condensate in neutron matter are studied. In the nucleon-nucleon particle-hole interaction it is essential to take into account the off-diagonality of the nucleon-nucleon interaction due to finite π- meson momentum. A reaction matrix calculated from the Reid soft core potential is used. Allowing the Δ isobar to enter as an intermediate particle in the polarisation bubbles of the curent-current correlation function and including s-wave pion-nucleon interactions, we obtain a critical density around two times normal nuclear matter density.

AB - The threshold conditions for a phase transition to a negative pion condensate in neutron matter are studied. In the nucleon-nucleon particle-hole interaction it is essential to take into account the off-diagonality of the nucleon-nucleon interaction due to finite π- meson momentum. A reaction matrix calculated from the Reid soft core potential is used. Allowing the Δ isobar to enter as an intermediate particle in the polarisation bubbles of the curent-current correlation function and including s-wave pion-nucleon interactions, we obtain a critical density around two times normal nuclear matter density.

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U2 - 10.1016/0370-2693(75)90171-9

DO - 10.1016/0370-2693(75)90171-9

M3 - Article

AN - SCOPUS:0009969878

SN - 0370-2693

VL - 55

SP - 1

EP - 5

JO - Physics Letters B

JF - Physics Letters B

IS - 1

ER -

Calculation of the threshold for π^- condensation in neutron matter

Abstract

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