CURRENT STATUS OF e⁺e⁻→π⁺π⁻η STUDY. EXPERIMENT AND THEORY
In this note I review the current status of electron-positron annihilation into the π⁺π⁻η final state from both experimental and theoretical sides. The theoretical studies of the reaction are discussed in framework of three theoretical approaches: the Vector Meson Dominance Model, the Resonance Chir...
| Main Author: | |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
V.N. Karazin Kharkiv National University Publishing
2018-04-01
|
| Series: | East European Journal of Physics |
| Subjects: | |
| Online Access: | http://periodicals.karazin.ua/eejp/article/view/10460 |
| _version_ | 1811338957004210176 |
|---|---|
| author | O. N. Shekhovtsova |
| author_facet | O. N. Shekhovtsova |
| author_sort | O. N. Shekhovtsova |
| collection | DOAJ |
| description | In this note I review the current status of electron-positron annihilation into the π⁺π⁻η final state from both experimental and theoretical sides. The theoretical studies of the reaction are discussed in framework of three theoretical approaches: the Vector Meson Dominance Model, the Resonance Chiral Theory with vector and axial-vector resonances and within the extended nonlocal version of the Nambu-Jona-Lasinio model. In the case of the Vector Meson Dominance model the three vector ρ-mesons are included, i.e. the main ρ(770) state and the excited ρ(1400) and ρ(1700) states. For the theoretical approach based on the Resonance Chiral Theory lagrangian the theoretical prediction includes either the lightest ρ(770) state only or the superposition of the main state ρ(770) with the ρ(1400), ρ(1700) states. Finally, the theoretical calculations in the framework of the Nambu-Jona-Lasinio model include both the lightest ρ(770) state and its first excited state ρ(1400) . To sum up the theoretical predictions of these three approaches are compared with the recent experimental data from Novosibirsk groups (SND and CMD experiments) and from the BaBar Collaboration. In addition, main points of studies on application of the Conservation Vector Current hypothesis to estimate the cross channel decay width, τ→π⁻π⁰ητ , are discussed. The last subject is an investigation of the OZI and G-parity violated decay ϕ→π⁺π⁻η. |
| first_indexed | 2024-04-13T18:18:11Z |
| format | Article |
| id | doaj.art-9311aaf1135f420581ef1c9bfbdf2187 |
| institution | Directory Open Access Journal |
| issn | 2312-4334 2312-4539 |
| language | English |
| last_indexed | 2024-04-13T18:18:11Z |
| publishDate | 2018-04-01 |
| publisher | V.N. Karazin Kharkiv National University Publishing |
| record_format | Article |
| series | East European Journal of Physics |
| spelling | doaj.art-9311aaf1135f420581ef1c9bfbdf21872022-12-22T02:35:35ZengV.N. Karazin Kharkiv National University PublishingEast European Journal of Physics2312-43342312-45392018-04-0151283510236CURRENT STATUS OF e⁺e⁻→π⁺π⁻η STUDY. EXPERIMENT AND THEORYO. N. Shekhovtsova0NSC ”Kharkov Institute of Physics and Technology” Akademicheskaya, 1, 61108 Kharkov, UkraineIn this note I review the current status of electron-positron annihilation into the π⁺π⁻η final state from both experimental and theoretical sides. The theoretical studies of the reaction are discussed in framework of three theoretical approaches: the Vector Meson Dominance Model, the Resonance Chiral Theory with vector and axial-vector resonances and within the extended nonlocal version of the Nambu-Jona-Lasinio model. In the case of the Vector Meson Dominance model the three vector ρ-mesons are included, i.e. the main ρ(770) state and the excited ρ(1400) and ρ(1700) states. For the theoretical approach based on the Resonance Chiral Theory lagrangian the theoretical prediction includes either the lightest ρ(770) state only or the superposition of the main state ρ(770) with the ρ(1400), ρ(1700) states. Finally, the theoretical calculations in the framework of the Nambu-Jona-Lasinio model include both the lightest ρ(770) state and its first excited state ρ(1400) . To sum up the theoretical predictions of these three approaches are compared with the recent experimental data from Novosibirsk groups (SND and CMD experiments) and from the BaBar Collaboration. In addition, main points of studies on application of the Conservation Vector Current hypothesis to estimate the cross channel decay width, τ→π⁻π⁰ητ , are discussed. The last subject is an investigation of the OZI and G-parity violated decay ϕ→π⁺π⁻η.http://periodicals.karazin.ua/eejp/article/view/10460precise measurements in electron-positron annihilationmeson productionCVC studylow-energy hadronic interaction |
| spellingShingle | O. N. Shekhovtsova CURRENT STATUS OF e⁺e⁻→π⁺π⁻η STUDY. EXPERIMENT AND THEORY East European Journal of Physics precise measurements in electron-positron annihilation meson production CVC study low-energy hadronic interaction |
| title | CURRENT STATUS OF e⁺e⁻→π⁺π⁻η STUDY. EXPERIMENT AND THEORY |
| title_full | CURRENT STATUS OF e⁺e⁻→π⁺π⁻η STUDY. EXPERIMENT AND THEORY |
| title_fullStr | CURRENT STATUS OF e⁺e⁻→π⁺π⁻η STUDY. EXPERIMENT AND THEORY |
| title_full_unstemmed | CURRENT STATUS OF e⁺e⁻→π⁺π⁻η STUDY. EXPERIMENT AND THEORY |
| title_short | CURRENT STATUS OF e⁺e⁻→π⁺π⁻η STUDY. EXPERIMENT AND THEORY |
| title_sort | current status of e⁺e⁻ π⁺π⁻η study experiment and theory |
| topic | precise measurements in electron-positron annihilation meson production CVC study low-energy hadronic interaction |
| url | http://periodicals.karazin.ua/eejp/article/view/10460 |
| work_keys_str_mv | AT onshekhovtsova currentstatusofeeppēstudyexperimentandtheory |