用部分波分析来确定\(\overline{p}p\)湮灭中产生的\(\Xi (1690)^{-}\)和\(\Xi (1820)^{-}\)的自旋

IF 2.6 3区物理与天体物理 Q2 PHYSICS, NUCLEAR

The European Physical Journal A Pub Date : 2025-01-28 DOI:10.1140/epja/s10050-025-01492-x

Deepak Pachattu

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引用次数: 0

摘要

最近（The PANDA collaboration, arXiv:2201.03852v2）， PANDA协作研究了通过反应通道\(\overline{p} p \rightarrow \bar{\Xi }^{+} \Lambda K^{-}\)确定\(\bar{p}p\)碰撞中\(\Lambda K^-\)系统中\(\Xi (1690)^{-}\)和\(\Xi (1820)^{-}\)共振的自旋和宇称的可行性。本文旨在利用先前发展的模型无关的不可约张量形式来研究这些反应。这项研究使我们确定了部分波振幅和可观测值，如果\(\Xi (1690)^{-}\)或\(\Xi (1820)^{-}\)具有自旋1/2，则这些共振在阈值（s波产生）下产生，则其将为零。

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Partial-wave analysis to determine the spin of \(\Xi (1690)^{-}\) and \(\Xi (1820)^{-}\) produced in \(\overline{p}p\) annihilation

Recently (The PANDA collaboration, arXiv:2201.03852v2) the PANDA collaboration studied the feasibility of determining the spin and parity of the \(\Xi (1690)^{-}\) and \(\Xi (1820)^{-}\) resonances in the \(\Lambda K^-\) system produced in \(\bar{p}p\) collisions via the reaction channel \(\overline{p} p \rightarrow \bar{\Xi }^{+} \Lambda K^{-}\). The present paper aims to study these reactions using a model-independent irreducible tensor formalism developed earlier. This study leads us to identify the partial-wave amplitude and the observable, which would be zero if \(\Xi (1690)^{-}\) or \(\Xi (1820)^{-}\) had spin-1/2, provided these resonances are produced at threshold (s-wave production).

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来源期刊

The European Physical Journal A 物理-物理：核物理

CiteScore

5.00

自引率

18.50%

发文量

216

审稿时长

3-8 weeks

期刊介绍： Hadron Physics Hadron Structure Hadron Spectroscopy Hadronic and Electroweak Interactions of Hadrons Nonperturbative Approaches to QCD Phenomenological Approaches to Hadron Physics Nuclear and Quark Matter Heavy-Ion Collisions Phase Diagram of the Strong Interaction Hard Probes Quark-Gluon Plasma and Hadronic Matter Relativistic Transport and Hydrodynamics Compact Stars Nuclear Physics Nuclear Structure and Reactions Few-Body Systems Radioactive Beams Electroweak Interactions Nuclear Astrophysics Article Categories Letters (Open Access) Regular Articles New Tools and Techniques Reviews.