Abstract
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 − → γ γ , 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%.
Highlights
Precise luminosity measurement is a key requirement for many experiments studying hadronic cross sections at e+e− colliders
Preliminary results of the luminosity determination are presented in a wide energy range
In 2011 and 2012, 34 pb−1 of integrated luminosity were collected in the c.m. energy range from 1.0 GeV to 2.0 GeV
Summary
Precise luminosity measurement is a key requirement for many experiments studying hadronic cross sections at e+e− colliders. A systematic uncertainty of the luminosity determination is one of the largest sources of the total uncertainty, which can significantly reduce the hadronic cross section accuracy. It is very important to determine the luminosity by using several well-known QED processes such as e+e− → e+e−, μ+μ−, γγ.
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
