Well. I have another thought about fixing manually. I can not fix manually since I only use ZDC vertex when I do not have good vertex from BB or TPM1. This means that I can not fix ZDC since I do not have any other reference to fix ZDC Vertex. hiro On Fri, 16 Mar 2001, Hironori Ito wrote: > Hello. I have a question. I remember reading the e-mail about > ZDC_Vertex do not have Multiplicity dependence. Well, I think it is > there. Look at the figure "ZDC_TPM1_vertex.ps" in > "http://pii3.brahms.bnl.gov/~hito". The figure is produced from > run 2336. In this figure, the vertical scale is > ZDC vertex - TPM1 (cluster) vertex, and the horizontal scale is BB > Mult. Of cause, it is possible that BB Mult is wrong. But, if I use > other mult such as Si and Tile mult, I see the same thing. Furthermore, I > do not see this much dependence from BBVertex - TPM1 Vertex although > BBVertex have other problem. Can someone look at this? The fix is > needed since multiplicity in Si can easily is affected by 3-4 cm shift of > vertex. Until it is fixed, I will manually (in my own code) fix ZDCVertex > to align to TPM1 vertex. > > Hiro > >
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