Spectra

Results From Friday 081001 Run :
pions; ~250k events;
y=-10,-8,-6,-4,-2,0,2,4,6,8,10;
pdsf data= /auto/pdsfdv14/starprod/pDST/P01he/central/Version4/ st_physics_*_raw_*.event.root.flowpicoevent.root
cut details:
no vertex cut
(mZDCe+mZDCw)<66&&mCTB>11000)
((asinh(mPt*sinh(mEta)/sqrt(0.13956995**2+mPt**2))>-0.1)
(asinh(mPt*sinh(mEta)/sqrt(0.13956995**2+mPt**2))<0.1)))
(mCharge<0))
(mDca<3))
(mNhits>25)

Log Mon 081301: Fits didn't work too well but the histograms "seem ok". Probably should try doing fits "by hand". Kaons and antiprotons are next. Juan is looking into fit problems. Here are the dedx histograms from y=-10,-8,...,0,...,8,10 with three m_T cuts presented for each rapidity as a sampling (both Log and Lin scales available). In each case, the color code is y=[light grey top, dark grey bottom].

Log Thurs 081601: The plots now include the latest (corrected) fits. See Juan and Trieu's pages for more details about the dEdx gain issues that caused the old fits to fail.
y=-10,-8 (Log)
y=-10,-8 (Lin)
y=-6,-4 (Log)
y=-6,-4 (Lin)
y=-2,0 (Log)
y=-2,0 (Lin)
y=2,4 (Log)
y=2,4 (Lin)
y=6,8 (Log)
y=6,8 (Lin)
y=10 (Log)
y=10 (Lin)

Here is an ensemble of all y's (ordered from left to right, top to bottom) with m_T slice number 15 as a sample. Mid-rapidity is highlighted in obnoxious yellow (not the last pad).
y={-10,-8,-6,-4,-2,0,2,4,6,8,10} (Log)
y={-10,-8,-6,-4,-2,0,2,4,6,8,10} (Lin)

Log 082001

Psuedocalibration plots for dedx over all mt,y:
overall average shift of 1.678 (note: 4 sig figs!).
Read the plots from top to bottom left to right for increasing rapidity. Mid-rapidity is bright yellow.
What is plotted? To generate a kind of ad hoc calibration for dEdx, I took the pions centroids from the latest "shifted" run (*tom1) and subtracted the pion centroids from the old run (*flo). I did this for each mt slice and y bin. nan's were zeroed out.
In short:
y axes=new pion centroids-old pion centroids
x axes=mt-m0 slice number
each pad represents a rapidity bin (e.g. histm6 -> y=-6 etc.)
The last histogram "shift histo of all y" is the distribution of all shifts and is centered about 1.678. I believe that this should be compared to our guess of 1.72 and Trieu's numbers.
y=-10 to 0
y=2 to 10 and shift histo of all y

Log 090101

tom1-bb
y=-10 to 0
y=2 to 10 and shift histo of all y

tom1-ah
y=-10 to 0
y=2 to 10 and shift histo of all y

bb-ah
y=-10 to 0
y=2 to 10 and shift histo of all y

added 091301
bb-av
y=-10 to 0
y=2 to 10 and shift histo of all y

091101 dedx calibration material (1.5+2.8log+1.72)

all y, all part
y>0
y<0 and all
y>0 all (big)
y<0 all (big)
all particles
all partilces (big)

091201 dedx calibration material (linear)

all y, all part
y>0
y<0 and all
y>0 all (big)
y<0 all (big)
all particles
all partilces (big)

100201 dedx linear "fine structure"

all y dedx splitting (y>0 difft scale)

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