BBC Singles Studies

BBC Singles trigger runs 19086049 (Ru) and 19089027 (Zr)

Observations:

  Zr Coin Zr East-Only Zr West-Only Ru Coin Ru East-Only Ru West-Only
% of all 3 conditions 22.1 40.0 37.8 16.3 42.9 40.8
% of events with found vertices 91.5 2.6 2.7 86.0 2.2 2.4
<N global tracks> 460.1 6.6 6.6 458.8 7.8 9.3
<N global tracks in events w/ verts>  501.2  158.3  150.8  529.5  163.8  221.0
<N primary tracks> 232.7 34.2 35.2 244.9 33.7 46.6
<eta global tracks> 0.14 0.04 0.17 0.14 -0.02 0.08
<eta global tracks in events w/verts>  0.14 0.08   0.09 0.14   0.06  0.10
 <N TPC hits>  13660  1564  1566  13610  1564 1579 
 <N TPChits in events w/verts  14750  4297  3918  15490  4137  5553
 

BEMC "Category 1" hits eta distributions:
Important note: Plots may have a suppressed zero (true for the "Coin" plots below)!

Zr Coin
Zr East-Only
Zr West-Only
Ru Coin
Ru East-Only
Ru West-Only


To-do:
  • Re-run with vertex-finder tuned to catch UPC events?
  • Look at TPC hits distributions more carefully.
Other suggestions?

-Gene