This title appears in the Scientific Report :
2019
Please use the identifier:
http://dx.doi.org/10.1140/epja/i2019-12736-0 in citations.
Phenomenological view on baryon-baryon potentials from lattice QCD simulations
Phenomenological view on baryon-baryon potentials from lattice QCD simulations
A qualitative discussion on the range of the potentials as they result from the phenomenological meson-exchange picture and from lattice simulations by the HAL QCD Collaboration is presented. For the former pion- and/or η-meson exchange are considered together with the scalar-isoscalar component of...
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Personal Name(s): | Haidenbauer, J. (Corresponding author) |
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Meissner, Ulf-G. | |
Contributing Institute: |
Theorie der Starken Wechselwirkung; IAS-4 Theorie der starken Wechselwirkung; IKP-3 |
Published in: | The European physical journal / A, 55 (2019) 5, S. 70 |
Imprint: |
Heidelberg
Springer
2019
|
DOI: |
10.1140/epja/i2019-12736-0 |
Document Type: |
Journal Article |
Research Program: |
TRR 110: Symmetrien und Strukturbildung in der Quantenchromodynamik Computational Science and Mathematical Methods |
Publikationsportal JuSER |
A qualitative discussion on the range of the potentials as they result from the phenomenological meson-exchange picture and from lattice simulations by the HAL QCD Collaboration is presented. For the former pion- and/or η-meson exchange are considered together with the scalar-isoscalar component of correlated ππ/KK¯ exchange. It is observed that the intuitive expectation for the behavior of the baryon-baryon potentials for large separations, associated with the exchange of one and/or two pions, does not always match with the potentials extracted from the lattice simulations. Only in cases where pion exchange provides the longest ranged contribution, like in the ΞN system, a reasonable qualitative agreement between the phenomenological and the lattice QCD potentials is found for baryon-baryon separations of r≳1 fm. For the ΩN and ΩΩ interactions where isospin conservation rules out one-pion exchange a large mismatch is observed, with the potentials by the HAL QCD Collaboration being much longer ranged and much stronger at large distances as compared to the phenomenological expectation. This casts some doubts on the applicability of using these potentials in few- or many-body systems. |