Trigger Operation Meeting (09/18/07)

Meeting Information

 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 ---

Operations/EMT

• On 09/13, Mark updated EMC UPS serial number reference file, and performed EMT Calibration at IR2. It was successful.

DQM

• Rahmat will add (L3 lumi)/(mu pair number) and comparing to B counting number into the strip charts.

Statistics Survey

• main web page
• 5 stages of emergency configurations: 0(default), 1, 2, 3, 4
• The differences:
  • 0->1 (kill prescaled lines)
  • 1->2 (kill some more ines including G*)
  • 2->3 (Add 1Zk to some lines)
  • 3->4 (3M&M*)
• 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*)

AOB

• 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.