Refined analysis of polarization in electron-positron annihilation process
Creators
- 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- hyperon pairs, , 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 pairs. We present three sets of expressions to describe the decay of hyperons, and further address the existing tension in the measurements of its decay parameters, particularly . The method and the framework developed in this paper can also be applied to studies of the production and decay mechanisms of other spin- particles.
Files
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
INIS
- Country of Publication
- United States
- Country of Input or Organization
- International Atomic Energy Agency (IAEA)
- Subject category
- S72: PHYSICS OF ELEMENTARY PARTICLES AND FIELDS;
- Descriptors DEI
- AMPLITUDES; ANNIHILATION; CORRELATIONS; DECAY; DENSITY MATRIX; ELECTRON-POSITRON INTERACTIONS; HELICITY; HYPERONS; LAMBDA PARTICLES; PAIR PRODUCTION; PARTICLE WIDTHS; POLARIZATION; POLARIZATION-ASYMMETRY RATIO; POSITRON COLLISIONS; S MATRIX; SPIN
- Descriptors DEC
- ANGULAR MOMENTUM; BARYONS; COLLISIONS; DIMENSIONLESS NUMBERS; ELEMENTARY PARTICLES; FERMIONS; HADRONS; INTERACTIONS; LEPTON-LEPTON INTERACTIONS; MATRICES; PARTICLE INTERACTIONS; PARTICLE PRODUCTION; PARTICLE PROPERTIES; STRANGE PARTICLES; lambda baryons
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