Work

Triangle singularity and a possible ϕp resonance in the Λc+→π0ϕp decay

Year: 2017

Type: article

Abstract: We study the Λ c + → π 0 ϕ p decay by considering a triangle singularity mechanism. In this mechanism, the Λ + c decays into the ⁎ ⁎ K ⁎ Σ ⁎ ( 1385 ) , the ⁎ Σ ⁎ ( 1385 ) decays into the π 0 Σ (or Λ), and then the ⁎ K ⁎ Σ (or Λ) interact to produce the ϕp in the final state. This mechanism produces a peak structure around 2020 MeV. In addition, the possibility that there is a hidden-strange pentaquark-like state is also considered by taking into account the final state interactions of ⁎ K ⁎ Λ , ⁎ K ⁎ Σ , and ϕp . We conclude that it is difficult to search for the hidden-strange analogue of the P c states in this decay. However, we do expect nontrivial behavior in the ϕp invariant mass distribution. The predictions can be tested by experiments such as BESIII, LHCb and Belle-II.

Source: Physics Letters B

DOI: 10.1016/j.physletb.2017.09.060

Authors: Ju-Jun Xie, Feng-Kun Guo

Institutions: Chinese Academy of Sciences, Institute of Modern Physics, University of Chinese Academy of Sciences, Institute of Theoretical Physics

Language: Latvian

Topic: Quantum Chromodynamics and Particle Interactions

Subfield: Nuclear and High Energy Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: diamond

Funder: National Natural Science Foundation of China

Awards: G5217693413, G6635316349, G8500088883