6533b82ffe1ef96bd1295981
RESEARCH PRODUCT
Hidden charm pentaquark and Λ(1405) in the Λb0→ηcK−p(πΣ) reaction
Wei-hong LiangWei-hong LiangEulogio OsetEulogio OsetJu-jun XieJu-jun Xiesubject
PhysicsNuclear and High Energy PhysicsParticle physicsMass distribution010308 nuclear & particles physics01 natural sciencesResonance (particle physics)Pentaquark3. Good healthIsospin0103 physical sciencesMass spectrumInvariant massCharm (quantum number)Invariant (mathematics)010306 general physicsdescription
Abstract We have performed a study of the Λ b 0 → η c K − p and Λ b 0 → η c π Σ reactions based on the dominant Cabibbo favored weak decay mechanism. We show that the K − p produced only couples to Λ ⁎ states, not Σ ⁎ and that the πΣ state is only generated from final state interaction of K ¯ N and ηΛ channels which are produced in a primary stage. This guarantees that the πΣ state is generated in isospin I = 0 and we see that the invariant mass produces a clean signal for the Λ ( 1405 ) of higher mass at 1420 MeV. We also study the η c p final state interaction, which is driven by the excitation of a hidden charm resonance predicted before. We relate the strength of the different invariant mass distributions and find similar strengths that should be clearly visible in an ongoing LHCb experiment. In particular we predict that a clean peak should be seen for a hidden charm resonance that couples to the η c p channel in the invariant η c p mass distribution.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2018-02-01 | Physics Letters B |