6533b851fe1ef96bd12aa093
RESEARCH PRODUCT
The χ decay to ϕK⁎K¯,ϕh1(1380) testing the nature of axial vector meson resonances
W.h. LiangShuntaro SakaiEulogi OsetEulogi OsetSheng-juan Jiangsubject
PhysicsNuclear and High Energy PhysicsMesonMass distributionUnitarityResonanceState (functional analysis)Atomic physicsQuantum numberPseudovectordescription
Abstract We perform a theoretical study of the χ c J → ϕ K ⁎ K ¯ → ϕ K π K ¯ reaction taking into account the K ⁎ K ¯ final state interaction, which in the chiral unitary approach is responsible, together with its coupled channels, for the formation of the low lying axial vector mesons, in this case the h 1 ( 1380 ) given the selection of quantum numbers. Based on this picture we can easily explain why in the χ c 0 decay the h 1 ( 1380 ) resonance is not produced, and, in the case of χ c 1 and χ c 2 decay, why a dip in the K + π 0 K − mass distribution appears in the 1550-1600 MeV region, that in our picture comes from a destructive interference between the tree level mechanism and the rescattering that generates the h 1 ( 1380 ) state. Such a dip is not reproduced in pictures where the nominal h 1 ( 1380 ) signal is added incoherently to a background, which provides support to the picture where the resonance appears from rescattering of vector-pseudoscalar components.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2019-10-01 | Physics Letters B |