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Systematic Study of Spin Effects at SPASCHARM Experiment at 70-GeV Accelerator in Protvino


Mochalov, V.V. (Moscow Phys. Eng. Inst.) ; Abramov, V.V. (Serpukhov, IHEP) ; Bazhanov, N.A. (LHEP JINR, Dubna) ; Borisov, N.S. (LHEP JINR, Dubna) ; Derevschikov, A.A. (Serpukhov, IHEP) ; Evdokimova, A.S. (Serpukhov, IHEP) ; Meshchanin, A.P. (Serpukhov, IHEP) ; Minaev, N.G. (Serpukhov, IHEP) ; Morozov, D.A. (Serpukhov, IHEP) ; Nurushev, S.B. (Moscow Phys. Eng. Inst.) ; Ryzhikov, S.V. (Serpukhov, IHEP) ; Semenov, P.A. (Serpukhov, IHEP) ; Ryazantsev, A.V. (Serpukhov, IHEP) ; Strikhanov, M.N. (Moscow Phys. Eng. Inst.) ; Rykov, V.L. (Moscow Phys. Eng. Inst.) ; Usov, Y.A. (LHEP JINR, Dubna) ; Vasiliev, A.N. (Moscow Phys. Eng. Inst.)

Published in: Int.J.Mod.Phys.Conf.Ser.
Year: 2016
Vol.: 40    Num./Issue: 01
Page No: 1660106
Pages: 7
Year: 2016-02-29 published

Abstract: A new experiment SPASCHARM for systematic study of polarization phenomena in the inclusive and exclusive hadronic reactions in the energy range of IHEP accelerator U-70 (12–50GeV) is currently under development. The universal experimental setup will detect dozens of various resonances and stable particles produced in collisions of unpolarized beams with the polarized target, and at the next stage, using polarized proton and antiproton beams. At the beginning, the final states consisting of light quarks (u, d, s) will be reconstructed, and later on the charmonium states will be studied. Measurements are planned for a variety of beams: π±,K±,p, antiprotons. Hyperon polarization and spin density matrix elements of the vector mesons will be measured along with the single-spin asymmetry (SSA). The 2π-acceptance in azimuth, which is extremely useful for reduction of systematic errors in measurements of spin observables, will be implemented in the experiment. The solid angle acceptance of the setup, Δθ ≈ 250 mrad vertically and 350 mrad horizontally in the beam fragmentation region, covers a wide range of kinematic variables pT and xF. This provides the opportunity for separating dependences on these two variables which is usually not possible in the setups with a small solid angle acceptance. Unlike some previous polarization experiments, the SPASCHARM will be able to simultaneously accumulate and record data on the both, charged and neutral particle production.

Keyword(s): Spin ; polarization ; asymmetry ; decays ; protons ; antiprotons ; charmonium

Web-Page: http://inspirehep.net/record/1427597/files/S201019451660106X.htm

Total numbers of views: 634
Numbers of unique views: 276
DOI: 10.1142/S201019451660106X
10.1142/S201019451660106X
 Record created 2016-04-04, last modified 2016-04-04


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