! E155 Inclusive hadron asymmetries A_LL for the deuteron. ! Beam Energy: 48.35 GeV; Scattering Angle: ~5.5 deg; ! Source: T.S. Toole, "A Precision Measurement of the Spin Structure ! Functions g1p and g1d", pg199, ! Doctoral Dissertation, American University (2000) unpublished. ! ! p is the momentum of the detected particle. ! A_LL is the inclusive hadron asymmetry, defined as ! (antiparallel - parallel) / (antiparallel + parallel) ! where antiparallel (parallel) refers to the number of events counted, normalized to ! incident beam charge, when the spins of the incident electrons and the target ! nucleons were anti-aligned (aligned). ! "stat" is the statistical error. ! The angle (eg. theta = 2.75, 5.5, or 10.5) represents the scattering angle at the ! center of a particular spectrometer's acceptance. It is measured ! relative to the beam direction. The angle "name" of the spectrometer ! is an approximate scattering angle for the electrons detected in that spectrometer. ! h^(+) indicates when the detected particle was a positively charged hadron. ! h^(-) " " " " " " " negatively " " . ! pi^(+) " " " " " " " positively " pion. ! pi^(-) " " " " " " " negatively " pion. ! Notes: These data differ slightly from those presented in Phys. Lett. B458:536-544,(1999) ! (aka, the E155 Hadron Paper). The differences are primarily due to: ! (1) The inclusion of additional runs. ! (2) These data take advantage of the final corrections to the proton polarization. ! !--------- A_LL(p) for deuteron at ~5.5 ------! ! p(GeV) ~5.5 h^(-) ~5.5 h^(+) ! A_LL +-stat A_LL +-stat 10.0 -0.014 0.017 0.009 0.026 11.0 0.014 0.009 0.005 0.014 12.0 -0.001 0.009 0.012 0.014 13.0 0.011 0.010 -0.005 0.016 14.0 0.020 0.012 0.000 0.018 15.0 0.016 0.015 0.035 0.023 16.0 -0.022 0.018 0.034 0.029 17.0 0.037 0.023 0.039 0.036 18.0 -0.010 0.029 -0.016 0.046 19.0 0.012 0.035 0.009 0.058 20.0 0.029 0.044 -0.007 0.072 21.0 -0.079 0.054 -0.036 0.092 22.0 -0.011 0.066 0.013 0.116 23.0 0.171 0.076 --- --- 24.0 0.074 0.087 --- ---