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IHEP 2013 - 4 (In Russian) | |
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V.V.Mochalov, V.V.Abramov, N.I.Belikov,
A.N.Vasil'ev, Yu.M.Goncharenko, V.N.Grishin, A.M.Davidenko, A.A.Dereveshchikov,
V.A.Kormilitsyn, Yu.M.Mel'nik, A.P.Meshchanin, N.G.Minaev, D.A.Morozov,
L.V.Nogach, S.B.Nurushev, A.F.Prudkoglyad, S.V.Ryzhikov, A.V.Ryazantsev,
P.A.Semenov, L.F.Solov'ev, A.E.Yakutin
(IHEP, Protvino, Russia),
N.A.Bazhanov, N.S.Borisov, V.G.Kolomiets, A.B.Lazarev,
A.B.Neganov, Yu.A.Plis, Yu.A.Usov, A.N.Fedorov, O.N.Shchevelev
(JINR, Dubna, Russia),
A.A.Belyaev, A.A.Luxanin
(KIPT, Kharkov, Ukraine)
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| Analyzing power in the reaction $\ppdup$ in the polarized target fragmentation region at 50 GeV | ||
| Protvino, 2013. – p. 13, figs. 7, tables 3., refs.: 29. | ||
Single spin asymmetry $A_N$ in the reaction $p + \pdup \rar \pi^0 + X$ at 50 GeV are presented in the interval $-0.6<\xf<-0.1$. $A_N$ is zero at small absolute $|\xf |$, increases with $|\xf |$ increase and equals $6.4\pm 1.6 (stat.) \pm 0.8 (syst.)$)\% at $|\xf|>0.25$. The asymmetry is in agreement with E-704 results on asymmetry measurements on $\pi^0$ inclusive production at FNAL and STAR measurements at BNL at polarized beam fragmentation region as well as with Protvino measurements at polarized target fragmentation region with the use of 40~GeV pion and 70 GeV proton beams. Result does no contradict universal threshold of single-spin asymmetry in the experiments with fixed target and calculations within Effective Color Field Model.
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