# Equation of state for dense nucleon matter

## Abstract

We report microscopic calculations of the equation of state for dense nuclear and neutron matter. The calculations are performed for five Hamiltonians: the Argonne v/sub 14/ and Urbana v/sub 14/ two-nucleon potentials, both alone and with the Urbana VII three-nucleon potential, and the density-dependent Urbana v/sub 14/ plus three-nucleon interaction model of Lagaris, Friedman, and Pandharipande. The beta-stable equation of state and neutron star structure are also calculated for three of the models. The models with the three-nucleon potential bracket the density-dependent model and are significantly stiffer than those with an unmodified two-nucleon potential only. The Argonne v/sub 14/ plus Urbana VII Hamiltonian produces a softening in the neutron matter equation of state localized around twice nuclear matter density which may indicate a neutral pion condensate.

- Authors:

- Publication Date:

- Research Org.:
- Physics Division, Argonne National Laboratory, Argonne, Illinois 60439

- OSTI Identifier:
- 6853071

- Alternate Identifier(s):
- OSTI ID: 6853071

- Resource Type:
- Journal Article

- Journal Name:
- Phys. Rev. C; (United States)

- Additional Journal Information:
- Journal Volume: 38:2

- Country of Publication:
- United States

- Language:
- English

- Subject:
- 73 NUCLEAR PHYSICS AND RADIATION PHYSICS; NEUTRON STARS; EQUATIONS OF STATE; NUCLEAR MATTER; HAMILTONIANS; HEAVY ION REACTIONS; PION CONDENSATION; POTENTIALS; SUPERNOVAE; TENSOR FORCES; VARIATIONAL METHODS; CHARGED-PARTICLE REACTIONS; EQUATIONS; ERUPTIVE VARIABLE STARS; MATHEMATICAL OPERATORS; MATTER; NUCLEAR REACTIONS; QUANTUM OPERATORS; STARS; VARIABLE STARS 653002* -- Nuclear Theory-- Nuclear Matter

### Citation Formats

```
Wiringa, R.B., Fiks, V., and Fabrocini, A.
```*Equation of state for dense nucleon matter*. United States: N. p., 1988.
Web. doi:10.1103/PhysRevC.38.1010.

```
Wiringa, R.B., Fiks, V., & Fabrocini, A.
```*Equation of state for dense nucleon matter*. United States. doi:10.1103/PhysRevC.38.1010.

```
Wiringa, R.B., Fiks, V., and Fabrocini, A. Mon .
"Equation of state for dense nucleon matter". United States. doi:10.1103/PhysRevC.38.1010.
```

```
@article{osti_6853071,
```

title = {Equation of state for dense nucleon matter},

author = {Wiringa, R.B. and Fiks, V. and Fabrocini, A.},

abstractNote = {We report microscopic calculations of the equation of state for dense nuclear and neutron matter. The calculations are performed for five Hamiltonians: the Argonne v/sub 14/ and Urbana v/sub 14/ two-nucleon potentials, both alone and with the Urbana VII three-nucleon potential, and the density-dependent Urbana v/sub 14/ plus three-nucleon interaction model of Lagaris, Friedman, and Pandharipande. The beta-stable equation of state and neutron star structure are also calculated for three of the models. The models with the three-nucleon potential bracket the density-dependent model and are significantly stiffer than those with an unmodified two-nucleon potential only. The Argonne v/sub 14/ plus Urbana VII Hamiltonian produces a softening in the neutron matter equation of state localized around twice nuclear matter density which may indicate a neutral pion condensate.},

doi = {10.1103/PhysRevC.38.1010},

journal = {Phys. Rev. C; (United States)},

number = ,

volume = 38:2,

place = {United States},

year = {1988},

month = {8}

}