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ISSN - 09205632, Nuclear Physics B - Proceedings Supplements, 2012, vol. 225-227, p. 69-71

Current status of the luminosity measurement with the CMD-3 detector at the VEPP-2000 e +e - collider

Akhmetshin R. R., Anisyonkov A. V., Ahokhin S. A., Aulchenko V. M., Banzarov V. S., Barkov L. M., Bashtovoy N. S., Berkaev D. E., Bondar A. E., Bragin A. V., Eidelman S. I., Epifanov D. A., Epshteyn L. B., Fedotovich G. V., Gayazov S. E., Grebenuk A. A., Grigoriev D. N., Gromov E. N., Ignatov F. V., Karpov S. V., Kazanin V. F., Khazin B. I., Koop I. A., Kozyrev A. N., Kuzmin A. S., Kuzmenko A. E., Logashenko I. B., Lysenko A. P., Lukin P. A., Mikhailov K. Yu, Pestov Yu N., Perevedentsev E. A., Pirogov S., Pivovarov S. G., Popov A. S., Popov Yu S., Redin S. I., Rogovsky Yu A., Ruban A. A., Ryskulov N. M., Ryzhenenkov A. E., Shebalin V. E., Shemyakin D. N., Shwartz B. A., Shwartz D. B., Sibidanov A. L., Shatunov P. Yu, Shatunov Yu M., Snopkov I. G., Solodov E. P., Titov V. M., Talyshev A. A., Vorobiov A. I., Yudin Yu V., Zaytsev A. S.

The first results of the luminosity measurement with the CMD-3 detector at the VEPP-2000 e +e - collider are presented. The luminosity was measured using two different processes e +e -→e +e - and e +e -→γγ, that allowed to better understand and estimate the systematic accuracy which was found to be ~2%. The analysis of the data was done on the integrated luminosity about 20 pb -1. A Monte-Carlo Generator Photon Jets (MCGPJ) [A.Arbuzov et al., EPJ C46, 689 (2006); S.Actis et al., EPJ C66, 585 (2010)] to simulate Bhabha scattering events as well as production of two photons was adopted for analysis of the data. A theoretical precision of these cross sections with radiative corrections (RC) is estimated to be better than 0.2%. © 2012 Elsevier B.V.