We review the recent status of the QCD sum rule approach to study the properties of
hadrons in vacuum and in hot or dense matter. Special focus is laid on the progress made in …

The masses of hadrons in the vacuum, where the chiral symmetry is restored, and in the
medium are generally different even when the changes in the order parameters of chiral …

In-medium masses of the light vector ω, ρ and axial-vector A 1 mesons are studied in the
magnetized nuclear matter, accounting for the effects of (inverse) magnetic catalysis at finite …

Masses of positive-parity and negative-parity diquarks are investigated at finite temperature
with a quark chemical potential. We employ the three-flavor Nambu-Jona-Lasinio model, in …

The dispersion relation of the ϕ meson in nuclear matter is studied in a QCD sum rule
approach. In a dense medium, longitudinal and transverse modes of vector particles can …

Masses of the singly heavy baryons (SHBs), composed of a heavy quark and a light diquark,
are studied from the viewpoints of heavy-quark spin symmetry (HQSS) and chiral-symmetry …

We calculate the masses of the vector and axial vector mesons as well as the nucleon and
the delta resonance in the chiral symmetry restored vacuum. This is accomplished by …

Observing the mass shifts of mesons immersed in nuclear matter is interesting, as the
changes are expected to shed light on the effects of chiral symmetry breaking on the origin …

The modification of the ϕ meson spectrum in nuclear matter is studied in an updated QCD
sum rule analysis, taking into account recent improvements in properly treating the chiral …

The properties of open strange meson K 1±in nuclear matter are estimated in the QCD sum
rule approach. We obtain a relation between the in-medium mass and width of K 1−(K 1+) in …