Two body final states production in electron-positron annihilation and their contributions to (g − 2) μ
Abstract In this paper, we study the processes of e + e − annihilation into two body final states, either two pseudoscalar mesons or one meson with a photon. The hadronic vacuum polarization form factors are calculated within the framework of resonance chiral theory in the energy region of E ≲ 2 GeV...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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SpringerOpen
2023-07-01
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| Series: | Journal of High Energy Physics |
| Subjects: | |
| Online Access: | https://doi.org/10.1007/JHEP07(2023)037 |
| _version_ | 1797647516649390080 |
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| author | Shi-Jia Wang Zhen Fang Ling-Yun Dai |
| author_facet | Shi-Jia Wang Zhen Fang Ling-Yun Dai |
| author_sort | Shi-Jia Wang |
| collection | DOAJ |
| description | Abstract In this paper, we study the processes of e + e − annihilation into two body final states, either two pseudoscalar mesons or one meson with a photon. The hadronic vacuum polarization form factors are calculated within the framework of resonance chiral theory in the energy region of E ≲ 2 GeV, with final state interactions taken into account. A joint analysis on the processes of e + e − → π + π − , K + K − , K L 0 K S 0 $$ {K}_L^0{K}_S^0 $$ , π 0 γ, and ηγ has been performed, and the latest experimental data are included. Based on the vacuum polarization form factors of these processes, we estimate their contributions to the lowest order of anomalous magnetic moment of the muon, (g – 2) μ . Combined with other contributions from hadronic vacuum polarization and other interactions from the standard model, the discrepancy between theoretical prediction and experimental measurement is ∆a μ = (24.1 ± 5.4) × 10 −10, i.e., 4.5σ. |
| first_indexed | 2024-03-11T15:18:41Z |
| format | Article |
| id | doaj.art-ea2f56944d94491a8a73bf92091f2ad1 |
| institution | Directory Open Access Journal |
| issn | 1029-8479 |
| language | English |
| last_indexed | 2024-03-11T15:18:41Z |
| publishDate | 2023-07-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Journal of High Energy Physics |
| spelling | doaj.art-ea2f56944d94491a8a73bf92091f2ad12023-10-29T12:07:23ZengSpringerOpenJournal of High Energy Physics1029-84792023-07-012023714410.1007/JHEP07(2023)037Two body final states production in electron-positron annihilation and their contributions to (g − 2) μShi-Jia Wang0Zhen Fang1Ling-Yun Dai2School of Physics and Electronics, Hunan UniversitySchool of Physics and Electronics, Hunan UniversitySchool of Physics and Electronics, Hunan UniversityAbstract In this paper, we study the processes of e + e − annihilation into two body final states, either two pseudoscalar mesons or one meson with a photon. The hadronic vacuum polarization form factors are calculated within the framework of resonance chiral theory in the energy region of E ≲ 2 GeV, with final state interactions taken into account. A joint analysis on the processes of e + e − → π + π − , K + K − , K L 0 K S 0 $$ {K}_L^0{K}_S^0 $$ , π 0 γ, and ηγ has been performed, and the latest experimental data are included. Based on the vacuum polarization form factors of these processes, we estimate their contributions to the lowest order of anomalous magnetic moment of the muon, (g – 2) μ . Combined with other contributions from hadronic vacuum polarization and other interactions from the standard model, the discrepancy between theoretical prediction and experimental measurement is ∆a μ = (24.1 ± 5.4) × 10 −10, i.e., 4.5σ.https://doi.org/10.1007/JHEP07(2023)037Chiral LagrangianProperties of HadronsSpecific QCD Phenomenology |
| spellingShingle | Shi-Jia Wang Zhen Fang Ling-Yun Dai Two body final states production in electron-positron annihilation and their contributions to (g − 2) μ Journal of High Energy Physics Chiral Lagrangian Properties of Hadrons Specific QCD Phenomenology |
| title | Two body final states production in electron-positron annihilation and their contributions to (g − 2) μ |
| title_full | Two body final states production in electron-positron annihilation and their contributions to (g − 2) μ |
| title_fullStr | Two body final states production in electron-positron annihilation and their contributions to (g − 2) μ |
| title_full_unstemmed | Two body final states production in electron-positron annihilation and their contributions to (g − 2) μ |
| title_short | Two body final states production in electron-positron annihilation and their contributions to (g − 2) μ |
| title_sort | two body final states production in electron positron annihilation and their contributions to g 2 μ |
| topic | Chiral Lagrangian Properties of Hadrons Specific QCD Phenomenology |
| url | https://doi.org/10.1007/JHEP07(2023)037 |
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