Trigger Operation Meeting (09/18/07)
Attendees: Rainer Bartoldus, Kim Hojeong, Selina Li, Rahmat Rahmat, Al Eisner.
Date : September 18, 2007
Time : 2:00pm - 3:30pm PST
SLAC Room : Madrone conf room, ROB
Dial-in : 1-510-665-5437, pass code 6649#
--- Minutes ---
- On 09/13, Mark updated EMC UPS serial number reference file, and performed EMT Calibration at IR2. It was successful.
- Rahmat will add (L3 lumi)/(mu pair number) and comparing to B counting number into the strip charts.
- main web page
- 5 stages of emergency configurations: 0(default), 1, 2, 3, 4
- The differences:
- Swagato's tau->e(mu)nu:
- electron mode: 1->2 (G*) shows bigger effect for this mode. 2->3 (adding Zk)\ is safer change.
- muon mode: 3->4 (3M&M*) shows big effect for pure EMT lines. G* doesn't help for this mode.
- Selina's 2 photon->pipi:
- 2 photon->pi0pi0: 1->2, 3->4 costs 3~4%. Others don't affect efficiency.
- 2 photon->pi+pi-: 1->2, 3->4 shows small effect. But 3M&M* depends on background and not reliable, killing G* is also not reliable, and putting Zk change too small. Is Zk simulation done realistically? At stage 4, what gives over 40% pure EMT efficiency?
- B->nu nubar (gamma):
- B->nu nubar: 3->4 shows 6% efficiency drop in 3->4. In 2->3 (Zk) pure DCT and Mixed has some effect. The overall efficiency is not affected much since EMT is not changed, but in terms of orthogonality, it has effect. Since 3->4 makes a big change, it's good that it's at the last.
- Order of stages may need to be changed.
- 1E is first to go (stage 0.5)
- Either 1 or 3 should be the first stage. These will be tight configuration (need to confirm, tight configuration may also has Zk).
- For emergency, 2 then 4.
- An example order: (1E line)->(3: add Zk)->(1: kill prescaled lines)->(2: G*)->(4: 3M&M*)
- We will continue discuss some more modes during collaboration meeting.
- Haiwen has conflict with other meeting. Unfortunately we concluded we can't change time. He can attend T/F/L AWG meeting.
This page was created by Kim Hojeong; however, you are welcome to edit and/or correct above items, specially for those who attended the meeting. Thanks.
Last Modified: September 18, 2007.