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Strong hyperon-nucleon pairing in neutron stars
Xian-Rong Zhou1, H-J Schulze, Feng Pan
1Department of Physics, Xiamen University, Xiamen 361005, People's Republic of China.
Physical Review Letters
|August 11, 2005
Summary
We studied hyperon-nucleon pairing, finding large sigma gaps. These findings are relevant for understanding neutron star physics.
Area of Science:
- Nuclear Physics
- Astrophysics
Background:
- Hyperons, such as lambda and sigma particles, can participate in nuclear pairing.
- Understanding hyperon-nucleon interactions is crucial for dense matter physics.
Purpose of the Study:
- To investigate hyperon-nucleon pairing possibilities.
- To evaluate the impact of hyperon pairing on neutron star properties.
Main Methods:
- Utilized various Nijmegen hyperon-nucleon potentials.
- Performed theoretical calculations of pairing gaps.
Main Results:
- Identified potential for very large nsigma- gaps.
- Estimated the significance of these gaps for neutron star interiors.
Conclusions:
- Hyperon pairing, particularly involving sigma hyperons, can significantly influence neutron star composition.
- The calculated gaps warrant further investigation in the context of neutron star models.