W. Weise
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View article: Sizes of the Nucleon
Sizes of the Nucleon Open
Evidences are updated and strengthened for the two-scales picture of low-energy nucleon structure as a compact `hard' valence quark core surrounded by a `soft' cloud of quark-antiquark pairs (the meson cloud). These considerations are quan…
View article: Theory of kaon-nuclear systems
Theory of kaon-nuclear systems Open
The strong interaction between an antikaon and a nucleon is at the origin of various interesting phenomena in kaon-nuclear systems. In particular, the interaction in the isospin $I=0$ channel is sufficiently attractive to generate a quasi-…
View article: Kaonic deuterium from realistic antikaon-nucleon interaction
Kaonic deuterium from realistic antikaon-nucleon interaction Open
We present precise three-body calculations for the spectrum of kaonic deuterium with a realistic antikaon-nucleon interaction. Thanks to the precise measurement of kaonic hydrogen, it is now possible to construct realistic $\bar KN$ intera…
View article: Local meson-baryon coupled-channels potential for the Lambda(1405)
Local meson-baryon coupled-channels potential for the Lambda(1405) Open
A local coupled-channels Kbar N-pi Sigma-pi Lambda potential is constructed, equivalently reproducing the scattering amplitude in chiral SU(3) dynamics. By analyzing the wave function of the Lambda(1405), we show the Kbar N dominance of th…
View article: From QCD Symmetries to Nuclei and Neutron Stars
From QCD Symmetries to Nuclei and Neutron Stars Open
Global symmetries and symmetry breaking patterns of QCD with light quarks, in particular chiral symmetry, provide basic guidance not only for low-energy hadron physics but also for nuclear forces and the nuclear many-body problem. Recent d…
View article: Signature of Λ(1405) in <i>K</i><sup>−</sup><i>d</i> → πΣ<i>n</i> Reaction
Signature of Λ(1405) in <i>K</i><sup>−</sup><i>d</i> → πΣ<i>n</i> Reaction Open
We study the Λ(1405) resonance production reaction employing the coupled-channels Alt-Grassberger-Sandhas equations. Full three-body calculations for the \(\bar{K}NN - \pi YN\) amplitudes are carried out on the physical real energy axis. T…
View article: Constraining the $\bar{K}N$ interaction from the $1S$ level shift of kaonic deuterium
Constraining the $\bar{K}N$ interaction from the $1S$ level shift of kaonic deuterium Open
Motivated by the precise measurement of the $1S$ level shift of kaonic hydrogen, we perform accurate three-body calculations for the spectrum of kaonic deuterium using a realistic antikaon-nucleon ($KN$) interaction. In order to describe b…
View article: Leading three-baryon forces from SU(3) chiral effective field theory
Leading three-baryon forces from SU(3) chiral effective field theory Open
Leading three-baryon forces are derived within SU(3) chiral effective field\ntheory. Three classes of irreducible diagrams contribute: three-baryon contact\nterms, one-meson exchange and two-meson exchange diagrams. We provide the\nminimal…
View article: Chiral symmetry breaking and confinement effects on dilepton and photon production around<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msub><mml:mi>T</mml:mi><mml:mi>c</mml:mi></mml:msub></mml:math>
Chiral symmetry breaking and confinement effects on dilepton and photon production around Open
Production rates of dileptons and photons from the quark-gluon (QGP) phase\nare calculated taking into account effects of confinement and spontaneous\nchiral symmetry breaking (\\chi SB) not far from the transition temperature\n$T_c$. We f…