Abstract
We calculate the invariant and helicity amplitudes for the transitions Λb→Λ(∗)(JP)+J/ψ, where the Λ(∗)(JP) are Λ(sud)-type ground and excited states with JP quantum numbers JP=12±, 32±. The calculations are performed in the framework of a covariant confined quark model previously developed by us. We find that the values of the helicity amplitudes for the Λ∗(1520,32-) and the Λ∗(1890,32+) are suppressed compared with those for the ground state Λ(1116,12+) and the excited state Λ∗(1405,12-). This analysis is important for the identification of the hidden charm pentaquark states Pc+(4380) and Pc+(4450) which were discovered in the decay chain Λb0→Pc+(→pJ/ψ)+K- because the cascade decay chain Λb→Λ∗(32±)(→pK-)+J/ψ involves the same final state.
| Original language | English |
|---|---|
| Article number | 013003 |
| Journal | Physical Review D |
| Volume | 96 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - 1 Jul 2017 |
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ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)
Cite this
Theoretical description of the decays Λb → Λ (∗) (12 ±, 32 ±)+J /ψ THEORETICAL DESCRIPTION of the DECAYS THOMAS GUTSCHE et al. / Gutsche, Thomas; Ivanov, Mikhail A.; Körner, Jürgen G.; Lyubovitskij, Valery E.; Lyubushkin, Vladimir V.; Santorelli, Pietro.
In: Physical Review D, Vol. 96, No. 1, 013003, 01.07.2017.Research output: Contribution to journal › Article
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TY - JOUR
T1 - Theoretical description of the decays Λb → Λ (∗) (12 ±, 32 ±)+J /ψ THEORETICAL DESCRIPTION of the DECAYS THOMAS GUTSCHE et al.
AU - Gutsche, Thomas
AU - Ivanov, Mikhail A.
AU - Körner, Jürgen G.
AU - Lyubovitskij, Valery E.
AU - Lyubushkin, Vladimir V.
AU - Santorelli, Pietro
PY - 2017/7/1
Y1 - 2017/7/1
N2 - We calculate the invariant and helicity amplitudes for the transitions Λb→Λ(∗)(JP)+J/ψ, where the Λ(∗)(JP) are Λ(sud)-type ground and excited states with JP quantum numbers JP=12±, 32±. The calculations are performed in the framework of a covariant confined quark model previously developed by us. We find that the values of the helicity amplitudes for the Λ∗(1520,32-) and the Λ∗(1890,32+) are suppressed compared with those for the ground state Λ(1116,12+) and the excited state Λ∗(1405,12-). This analysis is important for the identification of the hidden charm pentaquark states Pc+(4380) and Pc+(4450) which were discovered in the decay chain Λb0→Pc+(→pJ/ψ)+K- because the cascade decay chain Λb→Λ∗(32±)(→pK-)+J/ψ involves the same final state.
AB - We calculate the invariant and helicity amplitudes for the transitions Λb→Λ(∗)(JP)+J/ψ, where the Λ(∗)(JP) are Λ(sud)-type ground and excited states with JP quantum numbers JP=12±, 32±. The calculations are performed in the framework of a covariant confined quark model previously developed by us. We find that the values of the helicity amplitudes for the Λ∗(1520,32-) and the Λ∗(1890,32+) are suppressed compared with those for the ground state Λ(1116,12+) and the excited state Λ∗(1405,12-). This analysis is important for the identification of the hidden charm pentaquark states Pc+(4380) and Pc+(4450) which were discovered in the decay chain Λb0→Pc+(→pJ/ψ)+K- because the cascade decay chain Λb→Λ∗(32±)(→pK-)+J/ψ involves the same final state.
UR - http://www.scopus.com/inward/record.url?scp=85027056960&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85027056960&partnerID=8YFLogxK
U2 - 10.1103/PhysRevD.96.013003
DO - 10.1103/PhysRevD.96.013003
M3 - Article
AN - SCOPUS:85027056960
VL - 96
JO - Physical review D: Particles and fields
JF - Physical review D: Particles and fields
SN - 1550-7998
IS - 1
M1 - 013003
ER -