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ISSN - 17480221, Journal of Instrumentation, 2017, vol. 12, 7, p. -

Current status of luminosity measurement with the CMD-3 detector

Ryzhenenkov A. E., 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., Kasaev A. S., Koop I. A., Korobov A. A., Kozyrev A. N., Kozyrev E. A., Krokovny P. P., Kuzmenko A. E., Kuzmin A. S., Logashenko I. B., Lysenko A. P., Lukin P. A., Mikhailov K. Yu, Okhapkin V. S., Pestov Yu N., Perevedentsev E. A., Popov A. S., Razuvaev G. P., Rogovsky Yu A., Ruban A. A., Ryskulov N. M., Shatunov Yu M., 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., Yudin Yu V.

© 2017 IOP Publishing Ltd and Sissa Medialab. The CMD-3 detector has begun to take data at the electron-positron collider VEPP-2000 since december 2010. The collected data sample corresponds to an integrated luminosity of 60 pb -1 in the c.m. energy range from 0.32 up to 2 GeV and about 50pb -1 for RUN2017. The integrated luminosity was measured by counting e + e - → e + e - and e + e - → γγ events, allowing additional photons in the final state. Preliminary results of the luminosity measurement are presented for various energy ranges and its accuracy is estimated to be 1%.