Chiral approach to nuclear matter: role of two-pion exchange with virtual delta-isobar excitation

The pion plays an important role for the structure of nucleus and nuclear matter. We propose a new theoretical framework, named the tensor optimized shell model (TOSM) to calculate the tensor interaction together with the unitary correlation operator method (UCOM) for the short range repulsion. We are able to handle the pion exchange interaction directly in the proposed framework. We compare the calculated results for 4 He with the rigorous calculation to show the power of TOSM to treat the tensor interaction. We then discuss the important role of pion in hypernuclei due to excitation of Σ baryon from Λ state.

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On the pion exchange contribution to the Δ self-energy in nuclear matter

Lettere al Nuovo Cimento ◽

10.1007/bf02817030 ◽

1981 ◽

Vol 30 (5) ◽

pp. 138-142 ◽

Cited By ~ 2

Author(s):

E. Cenni ◽

G. Dillon

Keyword(s):

Nuclear Matter ◽

Pion Exchange ◽

Exchange Contribution ◽

Self Energy

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On the role of one-pion exchange in nuclear structure problems

Nuclear Physics ◽

10.1016/0029-5582(62)90295-x ◽

1962 ◽

Vol 37 ◽

pp. 647-651 ◽

Cited By ~ 4

Author(s):

J. Dabrowski

Keyword(s):

Nuclear Structure ◽

Pion Exchange

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THE ROLE OF THE NUCLEAR MATTER COMPRESSION MODULUS IN NEUTRON STARS

International Journal of Modern Physics D ◽

10.1142/s0218271804005754 ◽

2004 ◽

Vol 13 (07) ◽

pp. 1519-1524 ◽

Cited By ~ 2

Author(s):

VERÔNICA A. DEXHEIMER ◽

CÉSAR A. Z. VASCONCELLOS ◽

MOISÉS RAZEIRA ◽

MANFRED DILLIG

Keyword(s):

Neutron Stars ◽

Nuclear Matter ◽

Body Problem ◽

Mean Field Theory ◽

Mean Field ◽

Compression Modulus ◽

Baryon Number ◽

Many Body ◽

Relativistic Mean Field

For the nuclear many body problem at high densities, formulated in the framework of a relativistic mean-field theory, we investigate in detail the compression modulus of nuclear matter as a function of the effective nucleon mass. We include consistently in our modelling chemical equilibrium as well as baryon number and electric charge conservation and investigate properties of neutron stars. Among other predictions we focus on the dependence of the maximum mass of a sequence of neutron stars as a function of the compression modulus and the nucleon effective mass.

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