The UCD
Nuclear Physics Group

Pion refit


Physics Department, University of California, One Shields Avenue, Davis, CA 95616

    On this page the negative 6gev pions are refit with a simple model. A gate is simply put around the pions and they are counted, insted of using the two gaussian fit. The figures below are examples of these methods
6gev neg pions with a gate (example)
6gev neg pions with full fit (example)


    If the upper limit of the simple gate is adjusted so it matches the spectra from the fit they match rather well.
slice
full fit
full fit error
gate measurement
square root N
difference
1 13726 122 13752 117.1 -53
2 12720 115 12440 112 202
3 9172 97 8983 95 121
4 7069 86 6905 84 103
5 5236 73 5092 72 97
6 4064 65 3961 63 81
7 3001 55 2926 54 57
8 2391 51 2345 48 31
9 1905 45 1881 43 14
10 1516 40 1464 38 46
11 1230 35 1220 35 5
12 912 30 901 30 6
13 806 29 779 28 22
14 622 25 601 24 19
15 492 22 477 22 13
16 365 20 372 19 -6
17 296 17 302 17 -7
18 263 17 250 16 12
19 201 15 202 14 -1
19 174 13 178 13 -4

Last update: 10-APRIL-00.