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<div style="direction: ltr;font-family: Tahoma;color: #000000;font-size: 10pt;">Hi Eugene,<br>
<br>
Now I am checking the bad TOP paddles for the double pion photo-production using the Steffen's way.<br>
The double pion data has the 3 final state ( There is no missing particle) or 2 final state (There is one missing particle such as pi+, pi-, or proton).<br>
The events I used have two or three final particles.<br>
<br>
Steffen used the information of SCPB bank and I checked that bank.<br>
<br>
I have a question in this step.<br>
In the following event, SCPB has two informations.<br>
Can I think that in the SCPB bank, the line with ScPdHt 23301 is for proton and the line with ScPdHt 433001 is for pi+?<br>
Because SCPB bank do not has the pid, I can not distinguish each other in the bank.
<br>
<br>
______________________________<wbr>_________________________________________________________________<br>
<br>
Group: GPID Sector: 1 Nhits: 2 Next ind: 0<br>
pid: 14 (proton)<br>
vert-> x: 0.000 y: -1.008 z: 15.925<br>
p-> E: 1.045 px: -0.372 py: 0.003 pz: 0.271<br>
q: 1 trkid: 1 sec: 4 paddle: 30<br>
dedx: 42.547 beta: 0.441<br>
sc_stat: 2 sc_time: 49.653 sc_len: 464.393<br>
st_stat: 1 st_time: 14.307 st_len: 11.686<br>
mass: 0.960 mass_ref: 0 betam: 0.432<br>
epho: 0.490 tpho: 13.303 tagrid: 1 ngrf: 1 ppid: 14<br>
pid: 8 (pi+)<br>
vert-> x: -0.201 y: 0.116 z: 16.987<br>
p-> E: 0.233 px: 0.075 py: 0.076 pz: 0.153<br>
q: 1 trkid: 2 sec: 2 paddle: 33<br>
dedx: 14.097 beta: 0.801<br>
sc_stat: 2 sc_time: 35.200 sc_len: 510.424<br>
st_stat: 1 st_time: 14.398 st_len: 11.112<br>
mass: 0.141 mass_ref: 0 betam: 0.798<br>
epho: 0.490 tpho: 13.303 tagrid: 1 ngrf: 1 ppid: 8<br>
<br>
Group: SCPB Sector: 0 Nhits: 2 Next ind: 0<br>
ScPdHt: 23301 Edep: 14.097 Time: 35.200 Path: 510.424 Chi2SC: 8.005 Status: 33<br>
ScPdHt: 43001 Edep: 42.547 Time: 49.653 Path: 464.393 Chi2SC: 4.639 Status: 33<br>
_______________________________________________________________________________________________<br>
<br>
Best Wishes<br>
<br>
Sung<br>
Florida State University<wbr><wbr><wbr><wbr><wbr><br>
<br>
<br>
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