Reexamination of the role of the ${\Delta }^{\ast }$ resonances in the $pp\to n{K}^{+}{\Sigma }^{+}$ reaction

Abstract

In this work, the role of the ${\Delta }^{\ast }$ resonances in the process of $pp\to n{K}^{+}{\Sigma }^{+}$ are systematically investigated with the effective Lagrangian approach and the isobar model. We find that a $P_{31}$ state, either ${\Delta }^{\ast }(1750)$ or ${\Delta }^{\ast }(1910)$, is favored by the data while the $P_{33}$ state, namely ${\Delta }^{\ast }(1920)$, has small contribution. Besides, either sub-threshold $S_{31}$ ${\Delta }^{\ast }(1620)$ resonance or strong $n\Sigma$ final state interaction or both have possible contribution at near threshold region, depending on the measured cross sections. We demonstrate the invariant mass distributions and the Dalitz Plots in order to investigate whether it is possible to distinguish the controversial $K\Sigma$ production mechanism in these observables.

10 pages, published version

References in corpus (12)

• Extended Partial-Wave Analysis of piN Scattering Data
• Measurement of beam-recoil observables Ox, Oz and target asymmetry for the reaction gamma p -> K Lambda
• The reaction pi+ p --> K+ Sigma+ in a unitary coupled-channels model
• The role of ${\Delta }^{++\ast }(1620)$ resonances in $pp\to n{K}^{+}{\Sigma }^{+}$ reaction and its important implications
• P-wave excited baryons from pion- and photo-induced hyperon production
• Threshold hyperon production in proton-proton collisions at COSY-11
• The energy dependence of the pp->K+ n Sigma+ reaction close to threshold
• The pp->K+ n Sigma+ reaction near threshold
• Phenomenology of the Lambda/Sigma^0 production ratio in pp collisions
• Beam asymmetry $\Sigma$ measurements on the ${\pi }^{-}$ photoproduction off neutrons
• The measurement of the pp->K+ n Sigma+ reaction near threshold
• Strangeness Production Process $pp\to n{K}^{+}{\Sigma }^{+}$ within Resonance Model

Cited by in corpus (2)

• Neutral hidden charm pentaquark states $P_c^0(4380)$ and $P_c^0(4450)$ in ${\pi }^{-}p\to J/\psi n$ reaction
• ${\Lambda }_c^{+}(2940)$ photoproduction off the neutron