1. Muon Trigger Acceptance Study
Ye Li
UW-Madison

2. Goals Implement BMU + track trigger to extend acceptance for dimuons;
Investigate the acceptance gain from other newly implemented triggers;
Investigate the acceptance gain using the following muon regions: blue beam, keystone, and mini skirt.

3. Z Muon Cuts Variable Tight Cuts Regions CMUP, CMX or BMU Pt
> 20 GeV / c
Eem
< 2 + max (0,(p-100)×0.0115) GeV
Ehad
< 6 + max (0,(p-100)×0.028) GeV
Eisolt/Pt
< 0.1
# of axial SL with ≥ 5(BMU: 3)hits
≥ 3 (BMU: 2)
# of stereo SL with ≥ 5(BMU: 3)hits
≥ 2 (BMU: 1)
|z0|
< 60 cm
|d0|
< 0.2 cm
CMUP ∆X
< 5 cm
CMX ∆X
BMU ∆X
χ2 (COT dof)
< 2.75 (CMUP or CMX)
< 5.0 (BMU)
Mμμ
[ 66 GeV, 116 GeV ]
Z Muon Cuts

4. Run Number Plots of Z Muons
Require one leg as CMUP muon and the other as BMU muon
The RH plot has both triggers CMUP18 and L3BMU on

5. Invariant Mass

6. The top plots are: The bottom plots are: no trigger required
total entries: 84521
CMUP18 or CMX18 on
total entries: 83872
CMUP18, CMX18 or L3BMU on
total entries: 83873
The bottom plots are:
CMUP18 and CMX18 on
CMUP18 and L3BMU on

7. Eta Distribution

8. Use “or” to find out the following:
How many data events we have from the standard requirement of CMUP or CMX
How many data events we would gain by adding the BMU trigger, that is, requiring CMUP, CMX or BMU
How many total events there are in the bhmu stream, that is, by including all other non-standard triggers
Fewer than 1% additional events in the entire bhmu stream ( BMU data not included in the current stream? )

9. What to do next?
Check if there is a separate BMU-triggered data stntuple;
Use fiduciality definitions in the stntuple of the CMUP and CMX systems;
Investigate the acceptance gain using the following muon regions: blue beam, keystone, and mini skirt;
Study the efficiencies of newly implemented trigger.