6533b7d4fe1ef96bd1263483
RESEARCH PRODUCT
φ meson mass and decay width in nuclear matter
M. J. Vicente VacasD. Cabrerasubject
CouplingPhysicsNuclear and High Energy PhysicsParticle physicsNuclear TheoryMesonHigh Energy Physics::LatticeHigh Energy Physics::PhenomenologyNuclear TheoryFísicaFOS: Physical sciencesPropagatorNuclear matterPhi mesonVertex (geometry)Nuclear Theory (nucl-th)Nuclear physicsEffective lagrangianHigh Energy Physics::ExperimentGauge theoryNuclear Experimentdescription
The $\phi$ meson spectrum, which in vacuum is dominated by its coupling to the $\bar{K} K$ system, is modified in nuclear matter. Following a model based on chiral SU(3) dynamics we calculate the $\phi$ meson selfenergy in nuclear matter considering the $K$ and $\bar{K}$ in-medium properties. For the latter we use the results of previous calculations which account for $S-$ and $P-$wave kaon-nucleon interactions based on the lowest order meson-baryon chiral effective Lagrangian, and this leads to a dressing of the kaon propagators in the medium. In addition, a set of vertex corrections is evaluated to fulfill gauge invariance, which involves contact couplings of the $\phi$ meson to $S-$wave and $P-$wave kaon-baryon vertices. Within this scheme the mass shift and decay width of the $\phi$ meson in nuclear matter are studied.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2002-05-29 | Physical Review C |