Study of the process e + e - →π + π - γ with the CMD-3 detector at the e + e - collider VEPP-2000

Study of the process e + e - →π + π - γ with the CMD-3 detector at the e + e - collider VEPP-2000

Existing Monte-Carlo generators with radiative corrections to the e + e - →π + π - process are usually developed under the assumption that pions can be treated as pointlike particles. We study the e + e - →π + π - γ process with final-state radiation and test this assumption using simulated events f...

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Veröffentlicht in:EPJ Web of conferences 2019, Vol.212, p.4012
Hauptverfasser: Tolmachev, S. S., Akhmetshin, R. R., Amirkhanov, A. N., Anisenkov, A. V., Aulchenko, V. M., Banzarov, V. Sh, Bashtovoy, N. S., Berkaev, D. E., Bondar, A. E., Bragin, A. V., Eidelman, S. I., Epifanov, D. A., Epshteyn, L. B., Erofeev, A. L., Fedotovich, G. V., Gayazov, S. E., Grebenuk, A. A., Gribanov, S. S., Grigoriev, D. N., Ignatov, F. V., Ivanov, V. L., Karpov, S. V., Kazanin, V. F., Kirpotin, A. N., Koop, I. A., Korobov, A. A., Kozyrev, A. N., Kozyrev, E. A., Krokovny, P. P., Kuzmenko, A. E., Kuzmin, A. S., Logashenko, I. B., Lukin, P. A., Mikhailov, K. Yu, Okhapkin, V. S., Pestov, Yu. N., Popov, A. S., Razuvaev, G. P., Ruban, A. A., Ryskulov, N. M., Ryzhenenkov, A. E., Semenov, A. V., Shatunov, Yu. M., Shatunov, P. Yu, Shebalin, V. E., Shemyakin, D. N., Shwartz, B. A., Shwartz, D. B., Sibidanov, A. L., Solodov, E. P., Titov, V. M., Talyshev, A. A., Vorobiov, A. I., Zemlyansky, I. M., Yudinl, Yu. V.
Format: Artikel
Sprache:eng
Schlagworte:
Computer simulation
Energy spectra
Luminosity
Monte Carlo simulation
Pions
Rho-mesons
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Zusammenfassung:Existing Monte-Carlo generators with radiative corrections to the e + e - →π + π - process are usually developed under the assumption that pions can be treated as pointlike particles. We study the e + e - →π + π - γ process with final-state radiation and test this assumption using simulated events from the MCGPJ generator based on the scalar QED hypothesis. In order to increase a fraction of events with FSR, the analysis was performed in the energy region to the left from the ρ -meson peak (660÷785 MeV) that is based on the integrated luminosity of about 8.4 pb -1 . The experimental data for the photon energy spectrum agree with the simulation results at 1% level.
ISSN:2100-014X
2101-6275
2100-014X
DOI:10.1051/epjconf/201921204012