[G12] pKp[Km] ntuple

[Johann Goetz]

Hi all,
I was not sure who to send this to so I sent it to the g12 mailing list.  I
am outputting a small ntuple of proton K+ events where I have kinematically
fit to a missing K- with a probability selection of >1%. I have briefly
looked at the data to make sure the numbers are reasonable (see phi(1020)
peak attached).

I am copying the files here:
    /volatile/clas/clasg12/goetz/pkp_km_kfit_ntuple

The files I have processed so far are __complete_runs__ meaning that every
event was considered in the given run. e.g. the file kaon.good.56363.txt
includes all data from run 56363 ("good" here means non-trip regions).
These are plain-text files and the first two lines are header information:
first line is column label and the second line is column type: i4 = int, f4
= float.

I included the run and event number, the beam energy (ebeam) and the
four-momenta of the three particles p, kp, and km. The other columns are
the results from the kinematic fit. The one you might want to look at is
"kfitprob". I made a selection on this variable at >1%, but you might want
to first increase this to 10% if you find you have any background you can't
explain.

>head -3 kaon.good.56363.txt
run event kfitprob kfitchi2 kfitpull_ebeam kfitpull_p_mom kfitpull_p_lam
kfitpull_p_phi kfitpull_kp_mom kfitpull_kp_lam kfitpull_kp_phi
kfiterr_km_mom kfiterr_km_lam kfiterr_km_phi ebeam p_e p_px p_py p_pz kp_e
kp_px kp_py kp_pz km_e km_px km_py km_pz
i4 i4 f4 f4 f4 f4 f4 f4 f4 f4 f4 f4 f4 f4 f4 f4 f4 f4 f4 f4 f4 f4 f4 f4 f4
f4 f4
56363 40481 0.619477 0.246603 -0.507221 0.367299 0.49034 -0.507834 0.513646
-0.477136 0.501621 0.018267 0.0236273 0.0236293 2.9719 1.12352 -0.0508986
-0.243942 0.565551 1.80493 0.366565 0.431194 1.64126 0.981723 -0.315666
-0.187252 0.765084
...

-- 
Johann T. Goetz, PhD. <http://sites.google.com/site/theodoregoetz/>
jgoetz at ucla.edu
Nefkens Group, UCLA Dept. of Physics & Astronomy
Hall-B, Jefferson Lab, Newport News, VA
Office: 757-269-5465 (CEBAF Center F-335)
Mobile: 757-768-9999
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