arXiv subjects

Aojia Xu

Publications and source records attributed to Aojia Xu.

4 recordsLinked to original sources

arXiv2024

The Theoretical Study of $p\bar{p}\to\barΛΣη$ Reaction

We study the production of hyperon resonances in the $p\bar{p}\to\barΛΣη$ reaction within an effective Lagrangian approach. The model includes the production of $Σ(1750)$ and $Λ(1670)$ in the intermediate state excited by the $K$ and $K^*$ meson exchanges between the initial proton and antiproton. Due to the large coupling of $Σ(1750)Ση$ vertex, $Σ(1750)$ is found a significant contribution near the threshold in this reaction. We provide total and differential cross section predictions for the reation and discuss the possible influence of $Σ(1750)Ση$ vertex coupling and model parameters, which will be useful in future experimental studies. This reaction can provide a platform for studying the features of $Σ(1750)$ resonance, especially the coupling to $Ση$ channel.

hep-ph↗

arXiv2024

The Theoretical Study of $Σ^{+} p \toΛa_0^{+} p$ Reaction

We conducted a theoretical study on the process $Σ^{+} p \toΛa_0^{+} p$ based on an effective Lagrangian approach. This model encompasses the excitation of intermediate states leading to the production of $Δ(1920)$ through $π^{+}$ and $K^{+}$ meson exchanges between the initial $Σ^{+}$ baryon and the initial proton $p$, as well as the generation of $Δ(1940)$ via $π^{+}$ and $ρ^{+}$ meson exchanges. We provide predictions for the total and differential cross sections and discuss the potential impacts of cutoff parameters, off-shell effects, and branching ratios on the $Δ^{\ast} \to a_0 p$ decay. Given the dominance of $Δ(1940)$ in the region close to the reaction threshold, this reaction is considered an ideal platform for deeply exploring the unique properties of the $Δ(1940)$ resonance. Through this approach, we can gain a more precise understanding of the intrinsic characteristics of this particle.

hep-ph↗

arXiv2024

The Theoretical Study of $π^+p\to pa_0^+ϕ$ Reaction

We study the production of hyperon resonances in the $π^+p\to pa_0^+ϕ$ reaction within an effective Lagrangian approach. The model includes the production of $Δ(1940)$ and $Δ(1920)$ in the intermediate state excited by the $ρ$ and $p$ exchanges between the initial proton and $π$ meson. Due to the large contribution of $ρ$ exchange in $Δ(1940)$ production, $Δ(1940)$ is found a significant contribution near the threshold in this reaction. We provide total and differential cross section predictions for the reation and discuss the possible influence of model parameters, off-shell effects and branching ratios for $Δ(1940)\to pa_0$ and $Δ(1920)\to pa_0$ decays, which will be useful in future experimental studies. This reaction can provide a platform for studying the features of $Δ(1940)$ resonance, especially the coupling to $pa_0$ channel.

hep-ph↗

arXiv2023

The theoretical study of $D_s^+\toπ^+π^0π^0$

Inspired by recent BESIII's amplitude analysis on $D_s^+\toπ^+π^0π^0$, we develop a model based on the chiral unitary approach to discribe the $D_s^+\toπ^+π^0π^0$ decay, where $D_s^+$ decays into a $π^+$ and a quark-antiquark pair through weak decay of charm quark. The interaction of pseudoscalar mesons produced by the hadronization of quark-antiquark pair will lead to dynamically generated $f_0(980)$. The dominant amplitudes from resonances $f_0(1370)$ and $f_2(1270)$ in BESIII fit are also included in our model. In addition to above contributions, to obtain a good fit we also add a amplitude from resonance $f_2(1430)$ to our model. Our model fits well $M_{π^0π^0}$ and $M_{π^+π^0}$ invariant mass distributions simultaneously.

hep-ph↗