TY - JOUR

T1 - Measurement of hadronic cross sections at CMD-3

AU - CMD-3 Collaboration

AU - Logashenko, I. B.

PY - 2019/1/1

Y1 - 2019/1/1

N2 - The CMD-3 experiment at the VEPP-2000 collider in Novosibirsk carries out a comprehensive study of the exclusive cross-sections of e+e− → hadrons in the center-of-mass energy range from the threshold to √s < 2 GeV. The CMD-3 results provide an important input for calculation of the hadronic contribution to the muon anomalous magnetic moment. Currently there are worldwide efforts to improve the accuracy of this calculation to match the expected precision of the new experiment at Fermilab to measure muon (g-2), now taking data. The best precision is still achieved by integrating the measured total cross-section of e+e− → hadrons. The calculation is strongly dominated by low-energy data, in particular, by data at √s < 2 GeV. Other interesting topics of the CMD-3 physics program include a study of hadron cross-sections at the nucleon-antinucleon threshold and a search for two-photon production of C-even resonances. The energy scan of the whole energy range was performed in 2011-2013 and, after detector and collider upgrade and increase in luminosity by factor 2-3, in 2017-2019. The total luminosity integral collected so far is 250 pb−1. Here we present the current status of experiment and the survey of results of data analysis.

AB - The CMD-3 experiment at the VEPP-2000 collider in Novosibirsk carries out a comprehensive study of the exclusive cross-sections of e+e− → hadrons in the center-of-mass energy range from the threshold to √s < 2 GeV. The CMD-3 results provide an important input for calculation of the hadronic contribution to the muon anomalous magnetic moment. Currently there are worldwide efforts to improve the accuracy of this calculation to match the expected precision of the new experiment at Fermilab to measure muon (g-2), now taking data. The best precision is still achieved by integrating the measured total cross-section of e+e− → hadrons. The calculation is strongly dominated by low-energy data, in particular, by data at √s < 2 GeV. Other interesting topics of the CMD-3 physics program include a study of hadron cross-sections at the nucleon-antinucleon threshold and a search for two-photon production of C-even resonances. The energy scan of the whole energy range was performed in 2011-2013 and, after detector and collider upgrade and increase in luminosity by factor 2-3, in 2017-2019. The total luminosity integral collected so far is 250 pb−1. Here we present the current status of experiment and the survey of results of data analysis.

UR - http://www.scopus.com/inward/record.url?scp=85078464470&partnerID=8YFLogxK

U2 - 10.22323/1.367.0161

DO - 10.22323/1.367.0161

M3 - Conference article

AN - SCOPUS:85078464470

VL - 367

JO - Proceedings of Science

JF - Proceedings of Science

SN - 1824-8039

T2 - 29th International Symposium on Lepton Photon Interactions at High Energies, LeptonPhoton 2019

Y2 - 5 August 2019 through 10 August 2019

ER -