Conveners
Parallel session B3
- Volker Metag (University of Giessen)
The GlueX experiment at Jefferson Lab is uniquely suited for exclusive studies of strangeness production using a linearly polarized photon beam and the large acceptance GlueX detector. The combination of exclusive event reconstruction and access to spin observables at photon energies between 8.0 and 8.8 GeV provides a clean environment to study $t$-channel exchange processes, particularly in...
We report the first result on $\phi$ meson production in proton-nucleus (copper and carbon) collisions at J-PARC using the 30 GeV proton beam, measured via its dielectron decay channel [1]. This measurement was performed at the newly constructed high-momentum beamline at J-PARC. We employed the dielectron spectrometer developed for the J-PARC E16 experiment [2], which aims to study in medium...
This presentation reports on a re-analysis of the modification of the φ-meson mass spectrum in finite-density matter observed in the KEK-PS E325 experiment, using PHSD transport calculations.
Hadrons are considered to acquire most of their masses through spontaneous chiral symmetry breaking.
On the other hand, the quark condensate, which serves as an order parameter of spontaneous chiral...
The masses of mesons belonging to the nonet of pseudoscalar mesons are closely related to fundamental symmetry breaking in QCD. The $\eta^{\prime}$ meson, in particular, has an anomalously large mass due to the axial U(1) anomaly arising from nonperturbative gluon dynamics in the QCD vacuum. In the nuclear medium, where chiral symmetry is partially restored, a mass reduction of the...
I briefly discuss two apparent puzzles: (i) is the observation of eta'(958) meson bound
states in 11C [1] compatible with near-zero values of the eta'-N scattering length [2]?,
and (ii) is the Lambda binding energy of the hypertriton (L3H) small, 63(+38/-31) keV
(J-PARC E73 [3]), or large, 523+/-76 keV (A1@MAMI [4])?
For good background on searches for eta' nuclei, see Volker Metag's...
