Re: ep-elastic kinematics and kinematic corrections.

From: Nikolas Meitanis (nikolas@MIT.EDU)
Date: Mon Jan 02 2006 - 19:20:02 EST


So in the light of this (the new re-crunch being worse at least in
theta), should we use the old
crunch instead? Michael?

n

Eugene J. Geis wrote:

>Hello Blast,
>
>Apologies for the premature email: Chi is correct. My faulty calculation of a missing mass cut
>eliminated a great deal of my statistics. The discrepancy in the theta_e, theta_p that corresponds to the
>mean of thetae-theta_e(theta_p) = -0.44 and thetap-theta_p(theta_e) = -0.34 is about twice the
>original mean from the last crunch. As Chi has quoted, the theta deviation is worse with this library
>than with last year's original crunch of the H2 data.
>
>This necessitated the employment of a X^2 minimization in Q2 and then calculating the proper
>momenta and theta by event. The hard offsets still show discrete jumps by TOF which is why the new
>offsets are hard and added by charge and TOF. I'll have plots out with the differences in the dataset
>using the kinematic offsets.
>
>The offsets should be added like so:
>
>pe += pe_offset[electron][sector][tof];
>
>and
>
>thetap += tp_offset[electron][sector][tof];
>
>
>The offsets are:
>
>PeLeft[] = {0.0122,0.0131,0.0229,0.0209,0.0226,0.0229,0.0238,
> 0.0258,0.0247,0.0237,0.0219,0.0216,0.0230,0.0215,0.0193, 0.0187};
>
>PpLeft[] = { -0.0078,-0.0035,-0.0008,-0.0079,-0.0176,-0.0179,
>-0.0162,-0.0207,-0.0249,-0.0284,-0.0280,-0.0255,-0.0269,-0.0264,
>-0.0156, -0.0102};
>
>PeRight[] = {-0.0152,-0.0159,-0.0169, -0.0150,-0.0138,-0.0150,
>-0.0349,-0.0425,-0.0387,-0.0342, -0.0293, -0.0273,-0.0194,-0.0121,
> -0.0120,-0.0127};
>
>PpRight[] = {0.0401, 0.0396, 0.0419,0.0428,0.0400,0.0393, 0.0448,
>0.0476,0.0443,0.0453,0.0476, 0.0512, 0.0465,0.0414,0.0389,0.0346};
>
>TeLeft[] = {0.3109, 0.2367,0.6002,0.3758,0.3338,0.2095,0.1210,
>0.0776, -0.1202,-0.2350, -0.3792,-0.5872,-0.6170,-0.7477,-0.8057,
>0.1826};
>
>TpLeft[] = {1.2124,0.8412,0.5218,0.8061,1.2637,1.1962,0.9470,
>1.0394,1.1992,1.1599,1.2609,1.2712,1.4409,1.4654,1.0485,0.7716};
>
>TeRight[] = {-0.7944,-0.8158,-0.9546,-0.7797,-0.7888,-0.8689,
>-1.7485, -1.9771,-1.6745,-1.3052, -1.2031,-1.1692,-0.9293,-0.6885,
>-0.7704,-0.9981};
>
>TpRight[] = {0.0474,0.1496,0.0141,0.1354,0.1477,0.3213,0.5629,
>0.5377,0.3544,0.2760, 0.2538,0.2099,0.1363,0.0845,0.1247, 0.1422};
>
>
>in long form:
>
>electron in Left Sector:
> TOF = 0 offset = 0.0122
> TOF = 1 offset = 0.0131
> TOF = 2 offset = 0.0229
> TOF = 3 offset = 0.0209
> TOF = 4 offset = 0.0226
> TOF = 5 offset = 0.0229
> TOF = 6 offset = 0.0238
> TOF = 7 offset = 0.0258
> TOF = 8 offset = 0.0247
> TOF = 9 offset = 0.0237
> TOF = 10 offset = 0.0219
> TOF = 11 offset = 0.0216
> TOF = 12 offset = 0.0230
> TOF = 13 offset = 0.0215
> TOF = 14 offset = 0.0193
> TOF = 15 offset = 0.0187
>
>
>proton in Left Sector:
> TOF = 0 offset = -0.0078
> TOF = 1 offset = -0.0035
> TOF = 2 offset = -0.0008
> TOF = 3 offset = -0.0079
> TOF = 4 offset = -0.0176
> TOF = 5 offset = -0.0179
> TOF = 6 offset = -0.0162
> TOF = 7 offset = -0.0207
> TOF = 8 offset = -0.0249
> TOF = 9 offset = -0.0284
> TOF = 10 offset = -0.0280
> TOF = 11 offset = -0.0255
> TOF = 12 offset = -0.0269
> TOF = 13 offset = -0.0264
> TOF = 14 offset = -0.0156
> TOF = 15 offset = -0.0102
>
>
>electron in Right Sector:
> TOF = 0 offset = -0.0152
> TOF = 1 offset = -0.0159
> TOF = 2 offset = -0.0169
> TOF = 3 offset = -0.0150
> TOF = 4 offset = -0.0138
> TOF = 5 offset = -0.0150
> TOF = 6 offset = -0.0349
> TOF = 7 offset = -0.0425
> TOF = 8 offset = -0.0387
> TOF = 9 offset = -0.0342
> TOF = 10 offset = -0.0293
> TOF = 11 offset = -0.0273
> TOF = 12 offset = -0.0194
> TOF = 13 offset = -0.0121
> TOF = 14 offset = -0.0120
> TOF = 15 offset = -0.0127
>
>
>proton in Right Sector:
> TOF = 0 offset = 0.0401
> TOF = 1 offset = 0.0396
> TOF = 2 offset = 0.0419
> TOF = 3 offset = 0.0428
> TOF = 4 offset = 0.0400
> TOF = 5 offset = 0.0393
> TOF = 6 offset = 0.0448
> TOF = 7 offset = 0.0476
> TOF = 8 offset = 0.0443
> TOF = 9 offset = 0.0453
> TOF = 10 offset = 0.0476
> TOF = 11 offset = 0.0512
> TOF = 12 offset = 0.0465
> TOF = 13 offset = 0.0414
> TOF = 14 offset = 0.0389
> TOF = 15 offset = 0.0346
>
>
>electron THETA in Left Sector:
> TOF = 0 offset = 0.3109
> TOF = 1 offset = 0.2367
> TOF = 2 offset = 0.6002
> TOF = 3 offset = 0.3758
> TOF = 4 offset = 0.3338
> TOF = 5 offset = 0.2095
> TOF = 6 offset = 0.1210
> TOF = 7 offset = 0.0776
> TOF = 8 offset = -0.1202
> TOF = 9 offset = -0.2350
> TOF = 10 offset = -0.3792
> TOF = 11 offset = -0.5872
> TOF = 12 offset = -0.6170
> TOF = 13 offset = -0.7477
> TOF = 14 offset = -0.8057
> TOF = 15 offset = 0.1826
>
>
>proton THETA in Left Sector:
> TOF = 0 offset = 1.2124
> TOF = 1 offset = 0.8412
> TOF = 2 offset = 0.5218
> TOF = 3 offset = 0.8061
> TOF = 4 offset = 1.2637
> TOF = 5 offset = 1.1962
> TOF = 6 offset = 0.9470
> TOF = 7 offset = 1.0394
> TOF = 8 offset = 1.1992
> TOF = 9 offset = 1.1599
> TOF = 10 offset = 1.2609
> TOF = 11 offset = 1.2712
> TOF = 12 offset = 1.4409
> TOF = 13 offset = 1.4654
> TOF = 14 offset = 1.0485
> TOF = 15 offset = 0.7716
>
>
>electron THETA in Right Sector:
> TOF = 0 offset = -0.7944
> TOF = 1 offset = -0.8158
> TOF = 2 offset = -0.9546
> TOF = 3 offset = -0.7797
> TOF = 4 offset = -0.7888
> TOF = 5 offset = -0.8689
> TOF = 6 offset = -1.7485
> TOF = 7 offset = -1.9771
> TOF = 8 offset = -1.6745
> TOF = 9 offset = -1.3052
> TOF = 10 offset = -1.2031
> TOF = 11 offset = -1.1692
> TOF = 12 offset = -0.9293
> TOF = 13 offset = -0.6885
> TOF = 14 offset = -0.7704
> TOF = 15 offset = -0.9981
>
>
>proton THETA in Right Sector:
> TOF = 0 offset = 0.0474
> TOF = 1 offset = 0.1496
> TOF = 2 offset = 0.0141
> TOF = 3 offset = 0.1354
> TOF = 4 offset = 0.1477
> TOF = 5 offset = 0.3213
> TOF = 6 offset = 0.5629
> TOF = 7 offset = 0.5377
> TOF = 8 offset = 0.3544
> TOF = 9 offset = 0.2760
> TOF = 10 offset = 0.2538
> TOF = 11 offset = 0.2099
> TOF = 12 offset = 0.1363
> TOF = 13 offset = 0.0845
> TOF = 14 offset = 0.1247
> TOF = 15 offset = 0.1422
>
>
>
>
>



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