Study of light kaonic nuclei with a chiral SU(3)-based $$ \bar K $$ N interaction

Doté, Akinobu; Weise, W.

doi:10.1007/978-3-540-76367-3_50

Cited by 3 publications

(2 citation statements)

References 10 publications

(18 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[17], without [18][19][20][21] or with [22,23] final-state interactions, or coming from a three-body absorption process [24][25][26]. Actually, recent improved few-body calculations using realisticKN interactions and short-range correlations [27][28][29][30] predict few-nucleon kaonic states bound only by MeV and having large widths of the order on 100 MeV, thereby disclaiming the findings of Refs. [14][15][16].…”

Section: Introductionmentioning

confidence: 84%

Strange mesons in nuclear matter at finite temperature

2008

View full text Add to dashboard Cite

We study the properties of K andK mesons in nuclear matter at finite temperature from a chiral unitary approach in coupled channels that incorporates the s and p waves of the kaon-nucleon interaction. The in-medium solution accounts for Pauli blocking effects, mean-field binding on all the baryons involved, and π and kaon self-energies. We calculate K andK (off-shell) spectral functions and single-particle properties. TheK effective mass gets lowered by about −50 MeV in cold nuclear matter at saturation density and by half this reduction at T = 100 MeV. The p-wave contribution to theK optical potential, due to , , and * excitations, becomes significant for momenta larger than 200 MeV/c and reduces the attraction felt by theK in the nuclear medium. TheK spectral function spreads over a wide range of energies, reflecting the melting of the (1405) resonance and the contribution of Y N −1 components at finite temperature. In the KN sector, we find that the low-density theorem is a good approximation for the K self-energy close to saturation density due to the absence of resonance-hole excitations. The K potential shows a moderate repulsive behavior, whereas the quasiparticle peak is considerably broadened with increasing density and temperature. We discuss the implications for the decay of the φ meson at GSI Schwerionen Synchrotron energies as well as in the future Facility for Antiproton and Ion Research project.

show abstract

Section: Introductionmentioning

confidence: 84%

Strange mesons in nuclear matter at finite temperature

2008

View full text Add to dashboard Cite

show abstract

“…A variational approach with phenomenological local potentials has also been applied in [45] to study thē KNN system, leading to a bound state at about 50 MeV below theKNN threshold. A more recent variational calculation [46,47] emphasizes the important role of the repulsive NN interaction at short distances and obtains preliminary results having smaller bindings and larger widths than those found by the other earlier approaches.…”

Section: Introductionmentioning

confidence: 99%

Critical review ofK−ppnbound states

2008

View full text Add to dashboard Cite

We make a thorough study of the process of three-body kaon absorption in nuclei, in connection with a recent FINUDA experiment which claims the existence of a deeply bound kaonic state from the observation of a peak in the d invariant mass distribution following K − absorption on 6 Li. We show that the peak is naturally explained in terms of K − absorption from three nucleons leaving the rest as spectators. We can also reproduce all the other observables measured in the same experiment and used to support the hypothesis of the deeply bound kaon state. Our study also reveals interesting aspects of kaon absorption in nuclei, a process that must be understood in order to make progress in the search for K − deeply bound states in nuclei.

show abstract

K−pp system with chiral SU(3) effective interaction

2008

View full text Add to dashboard Cite

The K − pp system is investigated using a variational approach with realistic two-body interactions: the Argonne v18 NN potential and an energy dependentKN effective interaction derived from chiral SU (3) coupled-channel dynamics. Uncertainties in subthreshold extrapolations of theKN interaction are considered. A weakly bound K − pp state is found, with a binding energy B = (19 ± 3) MeV substantially smaller than suggested in previous calculations. The decay width Γ (K − pp → πΣN) is estimated to range between about 40 and 70 MeV.

show abstract

Study of light kaonic nuclei with a chiral SU(3)-based $$ \bar K $$ N interaction

Cited by 3 publications

References 10 publications

Strange mesons in nuclear matter at finite temperature

Strange mesons in nuclear matter at finite temperature

Critical review ofK−ppnbound states

K−pp system with chiral SU(3) effective interaction

Contact Info

Product

Resources

About