Testing the origin of the “f1(1420)” with the K¯p→Λ(Σ)KK¯π reaction

We study the K ¯ p → Y K K ¯ π reactions with K ¯ = K ¯ 0 , K - and Y = Σ 0 , Σ + , Λ , in the region of K K ¯ π invariant masses of 1200 - 1550 MeV. The strong coupling of the f 1 ( 1285 ) resonance to K ∗ K ¯ makes the mechanism based on K ∗ exchange very efficient to produce this resonance observ...

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Bibliographic Details
Published in:The European physical journal. C, Particles and fields Particles and fields, 2020-05, Vol.80 (5)
Main Authors: Liang, Wei-Hong, Oset, E.
Format: Article
Language:English
Subjects:
Astronomy
Astrophysics and Cosmology
Elementary Particles
Hadrons
Heavy Ions
Invariants
Mass distribution
Measurement Science and Instrumentation
Nuclear Energy
Nuclear Physics
Physics
Physics and Astronomy
Quantum Field Theories
Quantum Field Theory
Regular Article - Theoretical Physics
Resonance
String Theory
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Summary:We study the K ¯ p → Y K K ¯ π reactions with K ¯ = K ¯ 0 , K - and Y = Σ 0 , Σ + , Λ , in the region of K K ¯ π invariant masses of 1200 - 1550 MeV. The strong coupling of the f 1 ( 1285 ) resonance to K ∗ K ¯ makes the mechanism based on K ∗ exchange very efficient to produce this resonance observed in the K K ¯ π invariant mass distribution. In addition, in all these reactions one observes an associated peak at 1420 MeV which comes from the K ∗ K ¯ decay mode of the f 1 ( 1285 ) when the K ∗ is placed on shell at higher invariant masses. We call the attention to the possibility that the peaks observed in other reactions where the “ f 1 ( 1420 ) ” is observed have a similar origin.
ISSN:1434-6044
1434-6052
DOI:10.1140/epjc/s10052-020-7966-y