Study of the process $$e^+e^- \rightarrow \eta \pi ^0\gamma $$ e + e - → η π 0 γ in the energy range $$\sqrt{s} = {1.05-2.00}$$ s = 1.05 - 2.00 GeV with the SND detector
Abstract The process $$e^+e^-\rightarrow \eta \pi ^0\gamma $$ e + e - → η π 0 γ is studied in the center-of-mass energy range 1.05–2.00 GeV using data with an integrated luminosity of 94.5 $$\hbox {pb}^{-1}$$ pb - 1 collected by the SND detector at the VEPP-2000 $$e^{+}e^{-}$$ e + e - collider. The...
| Main Authors: | , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
SpringerOpen
2020-11-01
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| Series: | European Physical Journal C: Particles and Fields |
| Online Access: | http://link.springer.com/article/10.1140/epjc/s10052-020-08556-w |
| _version_ | 1828305071529525248 |
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| author | M. N. Achasov A. Yu. Barnyakov A. A. Baykov K. I. Beloborodov A. V. Berdyugin D. E. Berkaev A. G. Bogdanchikov A. A. Botov T. V. Dimova V. P. Druzhinin V. B. Golubev A. N. Kirpotin L. V. Kardapoltsev A. S. Kasaev A. G. Kharlamov I. A. Koop A. A. Korol D. P. Kovrizhin A. S. Kupich K. A. Martin N. A. Melnikova N. Yu. Muchnoy A. E. Obrazovsky E. V. Pakhtusova K. V. Pugachev D. V. Rabusov Yu. A. Rogovsky Y. S. Savchenko A. I. Senchenko S. I. Serednyakov D. N. Shatilov Yu. M. Shatunov D. A. Shtol D. B. Shwartz Z. K. Silagadze I. K. Surin M. V. Timoshenko Yu. V. Usov V. N. Zhabin V. V. Zhulanov |
| author_facet | M. N. Achasov A. Yu. Barnyakov A. A. Baykov K. I. Beloborodov A. V. Berdyugin D. E. Berkaev A. G. Bogdanchikov A. A. Botov T. V. Dimova V. P. Druzhinin V. B. Golubev A. N. Kirpotin L. V. Kardapoltsev A. S. Kasaev A. G. Kharlamov I. A. Koop A. A. Korol D. P. Kovrizhin A. S. Kupich K. A. Martin N. A. Melnikova N. Yu. Muchnoy A. E. Obrazovsky E. V. Pakhtusova K. V. Pugachev D. V. Rabusov Yu. A. Rogovsky Y. S. Savchenko A. I. Senchenko S. I. Serednyakov D. N. Shatilov Yu. M. Shatunov D. A. Shtol D. B. Shwartz Z. K. Silagadze I. K. Surin M. V. Timoshenko Yu. V. Usov V. N. Zhabin V. V. Zhulanov |
| author_sort | M. N. Achasov |
| collection | DOAJ |
| description | Abstract The process $$e^+e^-\rightarrow \eta \pi ^0\gamma $$ e + e - → η π 0 γ is studied in the center-of-mass energy range 1.05–2.00 GeV using data with an integrated luminosity of 94.5 $$\hbox {pb}^{-1}$$ pb - 1 collected by the SND detector at the VEPP-2000 $$e^{+}e^{-}$$ e + e - collider. The $$e^+e^-\rightarrow \eta \pi ^0\gamma $$ e + e - → η π 0 γ cross section is measured for the first time. It is shown that the dominant mechanism of this reaction is the transition through the $$\omega \eta $$ ω η intermediate state. The measured cross section of the subprocess $$e^+e^-\rightarrow \omega \eta \rightarrow \eta \pi ^0\gamma $$ e + e - → ω η → η π 0 γ is consistent with previous measurements in the $$e^+e^-\rightarrow \pi ^+\pi ^-\pi ^0\eta $$ e + e - → π + π - π 0 η mode. It is found, with a significance of $$5.6\sigma $$ 5.6 σ , that the process $$e^+e^-\rightarrow \eta \pi ^0\gamma $$ e + e - → η π 0 γ is not completely described by hadronic vector-pseudoscalar intermediate states. The cross section of this missing contribution, which can originate from radiation processes, e. g. $$e^+e^-\rightarrow a_{0}(1450)\gamma $$ e + e - → a 0 ( 1450 ) γ , is measured. It is found to be 15–20 pb in the wide energy range from 1.3 to 1.9 GeV. |
| first_indexed | 2024-04-13T14:22:33Z |
| format | Article |
| id | doaj.art-04650d1aad2f45038613b66c0a6e3d96 |
| institution | Directory Open Access Journal |
| issn | 1434-6044 1434-6052 |
| language | English |
| last_indexed | 2024-04-13T14:22:33Z |
| publishDate | 2020-11-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | European Physical Journal C: Particles and Fields |
| spelling | doaj.art-04650d1aad2f45038613b66c0a6e3d962022-12-22T02:43:24ZengSpringerOpenEuropean Physical Journal C: Particles and Fields1434-60441434-60522020-11-01801111010.1140/epjc/s10052-020-08556-wStudy of the process $$e^+e^- \rightarrow \eta \pi ^0\gamma $$ e + e - → η π 0 γ in the energy range $$\sqrt{s} = {1.05-2.00}$$ s = 1.05 - 2.00 GeV with the SND detectorM. N. Achasov0A. Yu. Barnyakov1A. A. Baykov2K. I. Beloborodov3A. V. Berdyugin4D. E. Berkaev5A. G. Bogdanchikov6A. A. Botov7T. V. Dimova8V. P. Druzhinin9V. B. Golubev10A. N. Kirpotin11L. V. Kardapoltsev12A. S. Kasaev13A. G. Kharlamov14I. A. Koop15A. A. Korol16D. P. Kovrizhin17A. S. Kupich18K. A. Martin19N. A. Melnikova20N. Yu. Muchnoy21A. E. Obrazovsky22E. V. Pakhtusova23K. V. Pugachev24D. V. Rabusov25Yu. A. Rogovsky26Y. S. Savchenko27A. I. Senchenko28S. I. Serednyakov29D. N. Shatilov30Yu. M. Shatunov31D. A. Shtol32D. B. Shwartz33Z. K. Silagadze34I. K. Surin35M. V. Timoshenko36Yu. V. Usov37V. N. Zhabin38V. V. Zhulanov39Budker Institute of Nuclear Physics, SB RASBudker Institute of Nuclear Physics, SB RASBudker Institute of Nuclear Physics, SB RASBudker Institute of Nuclear Physics, SB RASBudker Institute of Nuclear Physics, SB RASBudker Institute of Nuclear Physics, SB RASBudker Institute of Nuclear Physics, SB RASBudker Institute of Nuclear Physics, SB RASBudker Institute of Nuclear Physics, SB RASBudker Institute of Nuclear Physics, SB RASBudker Institute of Nuclear Physics, SB RASBudker Institute of Nuclear Physics, SB RASBudker Institute of Nuclear Physics, SB RASBudker Institute of Nuclear Physics, SB RASBudker Institute of Nuclear Physics, SB RASBudker Institute of Nuclear Physics, SB RASBudker Institute of Nuclear Physics, SB RASBudker Institute of Nuclear Physics, SB RASBudker Institute of Nuclear Physics, SB RASBudker Institute of Nuclear Physics, SB RASBudker Institute of Nuclear Physics, SB RASBudker Institute of Nuclear Physics, SB RASBudker Institute of Nuclear Physics, SB RASBudker Institute of Nuclear Physics, SB RASBudker Institute of Nuclear Physics, SB RASBudker Institute of Nuclear Physics, SB RASBudker Institute of Nuclear Physics, SB RASBudker Institute of Nuclear Physics, SB RASBudker Institute of Nuclear Physics, SB RASBudker Institute of Nuclear Physics, SB RASBudker Institute of Nuclear Physics, SB RASBudker Institute of Nuclear Physics, SB RASBudker Institute of Nuclear Physics, SB RASBudker Institute of Nuclear Physics, SB RASBudker Institute of Nuclear Physics, SB RASBudker Institute of Nuclear Physics, SB RASBudker Institute of Nuclear Physics, SB RASBudker Institute of Nuclear Physics, SB RASBudker Institute of Nuclear Physics, SB RASBudker Institute of Nuclear Physics, SB RASAbstract The process $$e^+e^-\rightarrow \eta \pi ^0\gamma $$ e + e - → η π 0 γ is studied in the center-of-mass energy range 1.05–2.00 GeV using data with an integrated luminosity of 94.5 $$\hbox {pb}^{-1}$$ pb - 1 collected by the SND detector at the VEPP-2000 $$e^{+}e^{-}$$ e + e - collider. The $$e^+e^-\rightarrow \eta \pi ^0\gamma $$ e + e - → η π 0 γ cross section is measured for the first time. It is shown that the dominant mechanism of this reaction is the transition through the $$\omega \eta $$ ω η intermediate state. The measured cross section of the subprocess $$e^+e^-\rightarrow \omega \eta \rightarrow \eta \pi ^0\gamma $$ e + e - → ω η → η π 0 γ is consistent with previous measurements in the $$e^+e^-\rightarrow \pi ^+\pi ^-\pi ^0\eta $$ e + e - → π + π - π 0 η mode. It is found, with a significance of $$5.6\sigma $$ 5.6 σ , that the process $$e^+e^-\rightarrow \eta \pi ^0\gamma $$ e + e - → η π 0 γ is not completely described by hadronic vector-pseudoscalar intermediate states. The cross section of this missing contribution, which can originate from radiation processes, e. g. $$e^+e^-\rightarrow a_{0}(1450)\gamma $$ e + e - → a 0 ( 1450 ) γ , is measured. It is found to be 15–20 pb in the wide energy range from 1.3 to 1.9 GeV.http://link.springer.com/article/10.1140/epjc/s10052-020-08556-w |
| spellingShingle | M. N. Achasov A. Yu. Barnyakov A. A. Baykov K. I. Beloborodov A. V. Berdyugin D. E. Berkaev A. G. Bogdanchikov A. A. Botov T. V. Dimova V. P. Druzhinin V. B. Golubev A. N. Kirpotin L. V. Kardapoltsev A. S. Kasaev A. G. Kharlamov I. A. Koop A. A. Korol D. P. Kovrizhin A. S. Kupich K. A. Martin N. A. Melnikova N. Yu. Muchnoy A. E. Obrazovsky E. V. Pakhtusova K. V. Pugachev D. V. Rabusov Yu. A. Rogovsky Y. S. Savchenko A. I. Senchenko S. I. Serednyakov D. N. Shatilov Yu. M. Shatunov D. A. Shtol D. B. Shwartz Z. K. Silagadze I. K. Surin M. V. Timoshenko Yu. V. Usov V. N. Zhabin V. V. Zhulanov Study of the process $$e^+e^- \rightarrow \eta \pi ^0\gamma $$ e + e - → η π 0 γ in the energy range $$\sqrt{s} = {1.05-2.00}$$ s = 1.05 - 2.00 GeV with the SND detector European Physical Journal C: Particles and Fields |
| title | Study of the process $$e^+e^- \rightarrow \eta \pi ^0\gamma $$ e + e - → η π 0 γ in the energy range $$\sqrt{s} = {1.05-2.00}$$ s = 1.05 - 2.00 GeV with the SND detector |
| title_full | Study of the process $$e^+e^- \rightarrow \eta \pi ^0\gamma $$ e + e - → η π 0 γ in the energy range $$\sqrt{s} = {1.05-2.00}$$ s = 1.05 - 2.00 GeV with the SND detector |
| title_fullStr | Study of the process $$e^+e^- \rightarrow \eta \pi ^0\gamma $$ e + e - → η π 0 γ in the energy range $$\sqrt{s} = {1.05-2.00}$$ s = 1.05 - 2.00 GeV with the SND detector |
| title_full_unstemmed | Study of the process $$e^+e^- \rightarrow \eta \pi ^0\gamma $$ e + e - → η π 0 γ in the energy range $$\sqrt{s} = {1.05-2.00}$$ s = 1.05 - 2.00 GeV with the SND detector |
| title_short | Study of the process $$e^+e^- \rightarrow \eta \pi ^0\gamma $$ e + e - → η π 0 γ in the energy range $$\sqrt{s} = {1.05-2.00}$$ s = 1.05 - 2.00 GeV with the SND detector |
| title_sort | study of the process e e rightarrow eta pi 0 gamma e e η π 0 γ in the energy range sqrt s 1 05 2 00 s 1 05 2 00 gev with the snd detector |
| url | http://link.springer.com/article/10.1140/epjc/s10052-020-08556-w |
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