6533b858fe1ef96bd12b6df5
RESEARCH PRODUCT
The width of the omega meson in the nuclear medium
Angels RamosEulogio OsetLaura TolosRaquel Molinasubject
Nuclear and High Energy PhysicsParticle physicsMesonNuclear TheoryNuclear TheoryNuclear physicsFOS: Physical sciences7. Clean energy01 natural sciencesOmegaMomentumNuclear Theory (nucl-th)PionChiral perturbation theory0103 physical sciencesMesons (Nuclear physics)Vector mesonMesons (Física nuclear)Nuclear structure010306 general physicsNuclear ExperimentPhysicsEstructura nuclear010308 nuclear & particles physicsPropagatorHeavy-Ion CollisionsFísicaNuclear matterFísica nuclearHigh Energy Physics::ExperimentHidden Local SymmetryBar (unit)description
We evaluate the width of the omega meson in nuclear matter. We consider the free decay mode of the omega into three pions, which is dominated by rho IEuro decay, and replace the rho and pi propagators by their medium-modified ones. We also take into account the quasielastic and inelastic processes induced by a vector-baryon interaction dominated by vector meson exchange, as well as the contributions coming from the mechanism with medium-modified K , propagators. We obtain a substantial increase of the omega width in the medium, reaching a value of 121 +/- 10 MeV at normal nuclear matter density for an omega at rest, which comes mainly from omega N -> pi pi N, omega NN -> pi NN processes associated to the dominant omega -> rho IEuro decay mode. The value of the width increases moderately with momentum, reaching values of around 200MeV at 600MeV/c.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2013-06-25 |