Role of theΔ*(1940)in theπ+p→K+Σ+

Abstract

The pp → nK + Σ + (1385) reaction is a very good isospin 3/2 filter for studying ∆ ++ * resonance decaying to K + Σ + (1385). Within the effective Lagrangian method, we investigate the Σ(1385) (spin-parity J P = 3/2 + ) hadronic production in the π + p → K + Σ + (1385) and pp → nK + Σ + (1385) reactions. For π + p → K + Σ + (1385) reaction, in addition to the "background" contributions from tchannel K * 0 exchange, u-channel Λ(1115) and Σ 0 (1193) exchange, we also consider the contribution from the s-channel ∆ * (1940) resonance, which has significant coupling to KΣ(1385) channel. We show that the inclusion of the ∆ * (1940) resonance leads to a fairly good description of the low energy experimental total cross section data of π + p → K + Σ + (1385) reaction. Basing on the study of π + p → K + Σ + (1385) reaction and with the assumption that the excitation of ∆ * (1940) resonance dominants the pp → nK + Σ + (1385) reaction, we calculate the total and differential cross sections of the pp → nK + Σ + (1385) reaction. It is shown that the new experimental data support the important role played by the ∆ * (1940) resonance with a mass in the region of 1940 MeV and a width of around 200 MeV. We also demonstrate that the invariant mass distribution and the Dalitz Plot provide direct information of the Σ + (1385) production, which can be tested by future experiments.

ϕ(2170) production in the process γp→ηϕp

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Role of the Λ(1600) in the ${K}^{-}p \rightarrow {\rm{\Lambda }}{\pi }^{0}{\pi }^{0}$ reaction

“…To evaluate the contributions of those terms shown in figure 1, the effective Lagrangian densities for relevant interaction vertexes are needed. Following [34][35][36][37][38][39][40], the Lagrangian densities used in this work are, reaction. The contributions from s-channel Λ(1600) and Λ(1670) resonances and u-channel nucleon pole are considered.…”

Neutral hidden charm pentaquark statesPc0(4380)andPLü1, Wang2, Xie3 et al. 2016Phys. Rev. DSelf Cite340280View full textAdd to dashboardCite

“…Here we study the π − p → J/ψn reaction within an effective Lagrangian approach, which has been widely employed to investigate the pion induced reactions [32,[47][48][49][50][51][52][53][54]. The relevant Feynman diagrams are depicted in Fig.…”