S.E. Gayazov

Study of the process e+e−→KS0KL0 in the center-of-mass energy range 1004–1060 MeV with the CMD-3 detector at the VEPP-2000 e+e− collider

This work is supported in part by the Russian Education and by the Russian Foundation for Basic RFBR 14-02-00580-a, RFBR 14-02-91332, RFBR 15-02-05674-a and RFBR 16-02-00160-a.

Study of the process e+e−→pp¯ in the c.m. energy range from threshold to 2 GeV with the CMD-3 detector

Abstract Using a data sample of 7.7 pb − 1 collected with the CMD-3 detector at the VEPP-2000 e + e − collider we select about 2900 events of the process e + e − → p p ¯ and measure its cross section at 12 energy points with about 6% systematic uncertainty. From the angular distribution of produced nucleons we obtain the ratio G E / G M .

Measurement of the e + e − → K + K − π + π − cross section with the CMD-3 detector at the VEPP-2000 collider

The process e + e − →K + K − π + π − e + e − → K + K − π + π − has been studied in the center-of-mass energy range from 1500 to 2000 MeV using a data sample of 23 pb −1 collected with the CMD-3 detector at the VEPP-2000 e + e − e + e − collider. Using about 24 000 selected events, the e + e − →K + K − π + π − e + e − → K + K − π + π − cross section has been measured with a systematic uncertainty decreasing from 11.7% at 1500–1600 MeV to 6.1% above 1800 MeV. A preliminary study of K + K − π + π − K + K − π + π − production dynamics has been performed.

Study of the process e+e− → π+π−π+π− in the c.m. energy range 920–1060 MeV with the CMD-3 detector

The cross section of the process ee → πππη has been measured using a data sample of 21.8 pb collected with the CMD-3 detector at the Corresponding author: solodov@inp.nsk.su Preprint submitted to Elsevier May 6, 2018 VEPP-2000 ee collider. 2769±95 signal events have been selected in the center-of-mass energy range 1394–2005 MeV. The production dynamics is dominated by the ω(782)η and φ(1020)η intermediate states in the lower energy range, and by the a0(980)ρ(770) intermediate state at higher energies.

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

Since December 2010 the CMD-3 detector has taken data at the electron-positron collider VEPP-2000. The collected data sample corresponds to an integrated luminosity of 60 pb−1 in the c.m. energy from 0.32 up to 2 GeV. The preliminary results of the luminosity measurement are presented in various energy ranges. The current accuracy for integrated luminosity is estimated to be 1%.

e^+e^-

A cross section of the process

collider

e^+e^- \to \pipi\pipi

Study of the process

has been measured using 6798

e^+e^-\to \pi^+\pi^-\pi^+\pi^-

\pm

in the c.m. energy range 920–1060 MeV with the CMD-3 detector

93 signal events from a data sample corresponding to an integrated luminosity of 9.8 pb