! E155 Inclusive hadron asymmetries A_LL for the deuteron. ! Beam Energy: 48.35 GeV; Scattering Angle: ~2.75 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 Doctoral Dissertation, American University (2000) unpublished.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 ~2.75------! ! p(GeV) ~2.75 h^(-) ~2.75 h^(+) ! A_LL +-stat A_LL +-stat 10.0 0.000 0.003 0.015 0.006 11.0 -0.003 0.003 -0.003 0.006 12.0 -0.004 0.004 -0.006 0.006 13.0 -0.006 0.004 0.004 0.007 14.0 0.002 0.004 0.001 0.007 15.0 0.001 0.005 0.004 0.008 16.0 -0.003 0.005 -0.007 0.009 17.0 0.017 0.006 -0.003 0.011 18.0 -0.006 0.007 -0.006 0.012 19.0 0.007 0.009 -0.001 0.015 20.0 -0.015 0.010 0.017 0.017 21.0 -0.016 0.012 0.015 0.020 22.0 -0.006 0.014 0.000 0.024 23.0 0.029 0.017 0.014 0.029 24.0 0.051 0.019 0.065 0.034 25.0 -0.019 0.022 0.014 0.041 26.0 0.038 0.026 -0.017 0.048 27.0 -0.048 0.029 0.006 0.056 28.0 -0.011 0.032 -0.075 0.066 29.0 0.039 0.035 --- ---