The Q-factor method

Step 1) The equation for the squared distance

The center-of-mass energy W 1725 < kin_var[0] < 1775 width = 50
cos θ( π+ ,* ) -1 < kin_var[1] < 1 width = 2
φ( π+ ,* ) 0 < kin_var[2] < 2π width = 2π
cos θ( proton, c.m. ) -1 < kin_var[3] < 1 width = 2

Step 2) Comparison between the old and new algorithm

If you want to see all of the 300 nearest events, click Here
Old Algorithm New Algorithm
Num Event Number D2 Num Event Number D2
1 91 0.146604 1 102 0.0211906
2 102 0.0211906 2 112 0.0361479
3 112 0.0361479 3 235 0.0375069
4 120 0.143016 4 341 0.021774
5 126 0.0670887 5 435 0.0223338
6 127 0.0660095 6 496 0.0338228
7 132 0.0718792 7 538 0.0349655
8 134 0.0903477 8 607 0.0417069
9 135 0.195679 9 611 0.0291455
10 143 0.103599 10 624 0.0393076

Step 3) Comparison the elapsed time between the old and new algorism

The old algorism

The new algorism



How is the carbon histogram working in Q-factor method ?

Case B01

    butanol histogram
  • φ : 20-Bin
  • θ : 1-Bin
  • BPol : 2-Bin
    carbon histogram
  • φ : 5-Bin
  • θ : 1-Bin
  • BPol : 2-Bin

Input-histogram (Black : butanol, Blue : carbon )

After working the Q-factor method