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User name J. Volmer
Log entry time 16:07:07 on April 7,1998
Entry number 108
This entry is a followup to: 107
keyword=-t phi mystery, take II
A look into my replay_1 t-phi plots shows that the strange behaviour occurs between run numbers 17402 and (including) 17440. A look into the runtable reveals that these are the runs with pi- and pi+ production at -4 degrees off parallel kinematics at Q^2=1.6 GeV^2/c^2 and E_beam=4.044 GeV. For both pi+ and pi- production now the plots look normal. Now, the problem has been solved without proper notion of what really solved it.