! E155 A_perpendicular for the proton and deuteron. ! Beam Energy: 38.80 GeV; Scattering Angle: ~10.5 deg; ! Source: P.M. King, ! "Precision Measurements of the Proton and Deuteron Polarized Structure Functions", pg158, ! Doctoral Dissertation, The College of William and Mary, (2000) unpublished. ! ! "x" pertains to the kinematic variable Bjorken x. ! is the statistically weighted average value of x for a particular bin. ! is the statistically weighted average value of the 4-momentum transferred squared. ! Aperp is the cross section asymmetry defined as: ! [sigma(downarrow Rightarrow) - sigma(uparrow Rightarrow)]/[sigma(downarrow Rightarrow) + sigma(uparrow Rightarrow)] ! where sigma is the cross section of a longitudinally polarized electron incident upon ! transverse polarized target. uparrow/downarrow indicates an electron polarization with/against the ! direction of travel of the incident electron. Rightarrow indicates the transversely polarized target nucleon. ! "stat" is the statistical error on Aperp. ! The angle (eg. 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 of the electrons detected in that spectrometer. ! Notes: ! 1. These data correspond to those presented in ! G. Mitchell, "Precision Measurement of the Spin Structure Function g1(x,Q^2) for the Proton and Deuteron", ! Doctoral Dissertation, University of Wisconsin, (May 1999). ! !--------------------------------- ~10.5 deg------------------------------------! ! bin x range !-------------proton-----------!!-----------deuteron-----------! ! low high Aperp +-stat Aperp +-stat 0.120 0.135 0.129 7.58 0.009 0.186 0.129 7.58 -0.018 0.139 0.135 0.152 0.144 8.38 0.007 0.120 0.144 8.38 -0.128 0.090 0.152 0.171 0.162 9.27 -0.145 0.106 0.162 9.27 -0.023 0.079 0.171 0.193 0.182 10.32 0.100 0.098 0.182 10.33 -0.173 0.075 0.193 0.217 0.205 11.44 0.072 0.093 0.205 11.46 -0.136 0.070 0.217 0.245 0.230 12.62 -0.105 0.095 0.230 12.63 0.077 0.074 0.245 0.275 0.259 13.78 -0.090 0.103 0.259 13.77 0.022 0.080 0.275 0.310 0.292 14.97 0.121 0.114 0.292 14.94 -0.172 0.090 0.310 0.349 0.328 16.14 -0.033 0.119 0.329 16.09 -0.136 0.097 0.349 0.393 0.370 17.23 -0.054 0.121 0.370 17.23 -0.051 0.102 0.393 0.442 0.416 18.43 0.041 0.130 0.417 18.42 -0.100 0.111 0.442 0.498 0.468 19.44 0.092 0.135 0.469 19.47 0.080 0.119 0.498 0.560 0.528 20.44 0.044 0.144 0.527 20.49 0.098 0.136 0.560 0.631 0.593 21.49 0.014 0.158 0.593 21.59 -0.040 0.156 0.631 0.710 0.668 22.64 0.012 0.177 0.667 22.73 0.448 0.179 0.710 0.799 0.750 23.72 0.503 0.217 0.750 23.77 -0.356 0.209 0.799 0.900 0.845 24.84 -0.264 0.327 0.845 24.94 -0.053 0.241