Published February 6, 2024 | Version v1
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Refined analysis of ΩΩ¯+ polarization in electron-positron annihilation process

  • 1. Key Laboratory of Particle Physics and Particle Irradiation (MOE), Institute of Frontier and Interdisciplinary Science, Shandong University, Qingdao, Shandong 266237, China
  • 2. School of Physics, Henan Normal University, Xinxiang, Henan 453007, China

Description

We investigate the production of spin-3/2 hyperon pairs, ΩΩ¯+, in electron-positron annihilation within the helicity formalism. A refined selection of helicity basis matrices is proposed to relate polarization expansion coefficients and spin density matrix elements and to illuminate their inherent physical interpretations and symmetrical properties. With a novel parametrization scheme of helicity amplitudes, we perform an analysis of polarization correlation coefficients for double-tag ΩΩ¯+ pairs. We present three sets of expressions to describe the decay of Ω hyperons, and further address the existing tension in the measurements of its decay parameters, particularly ϕΩ. The method and the framework developed in this paper can also be applied to studies of the production and decay mechanisms of other spin-3/2 particles.

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10.1103_PhysRevD.109.036005.pdf

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Additional details

Identifiers

DOI
10.1103/PhysRevD.109.036005;
arXiv
arXiv:2312.04363;
Crossref Funder ID
10.13039/501100001809; 10.13039/501100007129;

Publishing Information

Journal Title
Physical Review D
Journal Volume
109
Journal Issue
3
Journal Page Range
25 pgs.
ISSN
1089-4918

Optional Information

Contract/Grant/Project number
ZR2020MA098
Notes
Contact Email: zhangzhe@mail.sdu.edu.cn; Contact Email: songjiaojiao@ihep.ac.cn; Contact Email: zhouyj@sdu.edu.cn; Record automatically processed
Funding organization
National Natural Science Foundation of China; Natural Science Foundation of Shandong Province