/ Experiment-HEP hep-ex/0501063


Single spin asymmetry measurements for pi0 inclusive productions in p+p(up) ---> pi0 + X and pi- + p(up) ---> pi0 + X reactions at 70-GeV and 40-GeV respectively


Davidenko, A.M. (Serpukhov, IHEP) ; Derevschikov, A.A. (Serpukhov, IHEP) ; Grishin, V.N. (Serpukhov, IHEP) ; Khodyrev, V.Yu. (Serpukhov, IHEP) ; Matulenko, Yu.A. (Serpukhov, IHEP) ; Melnick, Yu.M. (Serpukhov, IHEP) ; Meschanin, A.P. (Serpukhov, IHEP) ; Mochalov, V.V. (Serpukhov, IHEP) ; Nogach, L.V. (Serpukhov, IHEP) ; Nurushev, S.B. (Serpukhov, IHEP) ; Semenov, P.A. (Serpukhov, IHEP) ; Prudkoglyad, A.F. (Serpukhov, IHEP) ; Shestermanov, K.E. (Serpukhov, IHEP) ; Soloviev, L.F. (Serpukhov, IHEP) ; Vasiliev, A.N. (Serpukhov, IHEP) ; Yakutin, A.E. (Serpukhov, IHEP) ; Borisov, N.S. (Dubna, JINR) ; Matafonov, V.N. (Dubna, JINR) ; Neganov, A.B. (Dubna, JINR) ; Plis, Y.A. (Dubna, JINR) ; Usov, Y.A. (Dubna, JINR) ; Fedorov, A.N. (Dubna, JINR) ; Lukhanin, A.A. (Kharkov, KIPT) ; Ryskin, M.G. (St. Petersburg, INP)

Page No: 548-550
Pages: 4

Abstract: The inclusive $\pi^0$ asymmetries were measured in reactions $p+p\uparrow \to \pi^0+X$ and $\pi^-+p\uparrow \to \pi^0+X$ at 70 and 40 GeV/c respectively. The measurements were made at the central region (for the first reaction) and asymmetry is compatible with zero in the entire measured $p_T$ region. For the second reaction the asymmetry is zero for small $x_F$ region ($-0.4<x_F<-0.1, 0.5<p_T(GeV/c) <1.5$) and increases with growth of $\mid x_F\mid$. Averaged over the interval $-0.8<x_F<-0.4, 1<p_T(GeV/c)<2$ the asymmetry was $-(13.8\pm 3.8)%$.

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 Record created 2010-10-28, last modified 2013-11-12



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