Polarimetry with inclusive charged pions at U-70 accelerator of IHEP

16th Workshop on High Energy Spin Physics

Rykov, V.L.^1 ; Abramov, V.V.^2 ; Bogdanov, A.A.^1 ; Mochalov, V.V.^1,2 ; Nurushev, S.B.^1,2 ; Semenov, P.A.^1,2 ; Strikhanov, M.N.^1 ; Vasiliev, A.N.^1,2

National Research Nuclear University, Moscow Engineering Physics Institute), Moscow

115409, Russia^1

Institute for High Energy Physics National Research Centre Kurchatov Institute, Protvino

142284, Russia^2

关键词: Beam polarization;    Charged pions;    Physics data;    Single-spin asymmetries;    Statistical errors;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/678/1/012028/pdf
DOI  :  10.1088/1742-6596/678/1/012028

来源: IOP

【 摘 要 】

A feasibility of the proton beam polarimetry based on exploiting the observed large single-spin asymmetry ANin inclusive charged pion production is evaluated for the SPASCHARM experiment at IHEP, Protvino, Russia. It is shown that, for a few hours of beam exposition time, the beam polarization could be measured at the statistical errors of ∼3-5%. The inclusive pion polarimetry at SPASCHARM does not require construction of a special polarimeter. The polarimetry will be carried out entirely by the main SPASCHARM spectrometer simultaneously with physics data taking.