! Coefficients for polarized parton distribution functions 
! from the E155 NLO pQCD fit to the world data set on g1(x,Q^2). 
! Beam energy: 48.35 Gev.
! Source: T.S. Toole, "A Precision Measurement of the       
!         Spin Structure Functions g1p and g1d", pg227,                    
!         Ph.D. thesis, American University, (2000) unpublished.  
!
! Parametrization of the polarized PDF's were of the form: 
!   Delta f(x,(Q_0)^2) = A_f * x^(alpha_f) * f(x,(Q_0)^2)
!   where: 
!      f(x,(Q_0)^2) are unpolarized PDF's from Gluck, Reya, and Vogt, Eur. Phys. J. C5, 461 (1998).
!      and f = u (up valence quarks), d (down valence quarks), Qbar (sea quarks), or g (gluons). 
!      Delta Qbar = 1/2 * (Delta ubar + Delta dbar) + 1/5 * Delta sbar.
!
!      See G. Mitchell, SLAC Report SLAC-R-540 (1999) and the above references for details. 
!
!             |Value |--- Stat. --||--- Syst. --|          
    A_u          0.95  +0.04  -0.01  +0.05  -0.04
    A_d         -0.42  +0.02  -0.04  +0.02  -0.04
    A_Qbar       0.01  +0.47  -0.01  +0.50  -0.12
    A_g          0.50  +0.37  -0.54  +0.48  -1.13
    alpha_u      0.57  +0.05  -0.01  +0.04  -0.02
    alpha_d      0.00  +0.00  -0.00  +0.01  -0.00
    alpha_Qbar   1.00  +0.24  -0.22  +0.43  -0.29
    alpha_g      0.02  +0.66  -0.02  +0.78  -0.02