1.03 tp +.93 - 1.13 3.6 3.9 5.6 5 1.56 1.13 - 2.64 4.1 5.1 In terms of our bins (normalizing the PTdistribution and inte­ grating over x and PT) the cross section for a bin is: F where M= M(I), tM. = ~(I), c = c(I), b = bel) and: ~- = -1 + (m +.5)~F ' m = 0, 1, •••, (2/~~ - 1) and: ~PT = 2/b(l), PT = (2n+1)/b(I) n = 0, 1, 2, ••• He used five PT bins and 10 ~ bins (~~ =.2), thus giving us 250 bins in l....hich to calculate ~ production according to the formula fo 00 I F x Acceptano obtain the rate of single ~fS in our apparatus, our program generated 2000 ~ pairs in each bin, 10 for each angle variable (tp, cosa, ~) -29­ and one each for bend in/bend out. If on track1ng a ~ hit the back detector the event was recorded and a number, W = 1000 * F was attached to the event. In addition to using these numbers for weighing x, y displays they were summed (8) to give the total number of ~IS hitting the detector. 8 x S = 8 x 2000 x'10 7 I F x Acceptance M,PT'~ = 1.6 x 10 ce. Since