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<p>Hi Mike,</p>
<p> The information in REC_ForwardTagger contains both FTCAL and
FTHODO events so you should check the REC_ForwardTagger_detector
bank: =10 => CAL ; =11 =>HODO.</p>
<p> Saying that there is still a bug or two I think. I previously
reported that for a given event regardless of the number of
ForwardTagger hits pindex is always the same so only 1 FT
REC::Particle gets an assigned time etc. <br>
</p>
<p> The factor 6.4 may be to do with a units change, the hit
positions are now given in cms.</p>
<p>Cheers</p>
<p>Derek<br>
</p>
<br>
<div class="moz-cite-prefix">On 07/09/18 02:55, Michael Dugger
wrote:<br>
</div>
<blockquote type="cite"
cite="mid:Pine.LNX.4.64.1809062144190.15132@jlabl1.jlab.org">
<br>
Hi,
<br>
<br>
I think I found a quick temporary way to get results to look a lot
like when we used the FT_particles bank
<br>
<br>
Caveat: This is just a quick fix and a detailed study needs to be
made to check what is the best way to go forward when using the
REC_ForwardTagger.
<br>
<br>
Perhaps I have some strange bug that makes the method below work.
I do not know. I just know what I have below gets me results very
similar to what I had in the past.
<br>
<br>
It looks like whenever I have more than 2 hits in
REC_ForwardTagger, the remaining hits are duplicates of the first
two. Moreover, the second REC_ForwardTagger hit looks like it
might be garbage. So just take the first hit in the
REC_ForwardTagger bank.
<br>
<br>
Here is how I get the tagger information:
<br>
<br>
ftJ = 0;
<br>
ftEnergy = myTree.REC_ForwardTagger_energy->at(ftJ);
<br>
ftTime = myTree.REC_ForwardTagger_time->at(ftJ);
<br>
ftX = myTree.REC_ForwardTagger_x->at(ftJ);
<br>
ftY = myTree.REC_ForwardTagger_y->at(ftJ);
<br>
ftZ = myTree.REC_ForwardTagger_z->at(ftJ);
<br>
ftL = sqrt(pow(ftX,2) + pow(ftY,2) + pow(ftZ,2));
<br>
ftCx = ftX/ftL;
<br>
ftCy = ftY/ftL;
<br>
ftCz = ftZ/ftL;
<br>
<br>
For the time-of-flight I use:
<br>
<br>
deltaT = tofTime - ftTime + 6.4 - vertex.Z()/30.0
<br>
<br>
That factor of 6.4 is strange, but I have to put that in to get
mass distributions that look OK :(
<br>
<br>
Take care,
<br>
Michael
<br>
<br>
On Thu, 6 Sep 2018, Will Phelps wrote:
<br>
<br>
<blockquote type="cite">Yeah, I’m not sure who has done in depth
studies of the Rec:particle and rec:forwardtagger banks vs the
FT:Particles bank. Maybe Raffaella or Nathan can point us in the
right direction. Or maybe we’ll have to run our own comparisons.
<br>
<br>
-Will
<br>
<br>
Sent from my iPhone
<br>
<br>
<blockquote type="cite">On Sep 6, 2018, at 7:52 PM, Michael
Dugger <a class="moz-txt-link-rfc2396E" href="mailto:dugger@jlab.org"><dugger@jlab.org></a> wrote:
<br>
<br>
<br>
Hi,
<br>
<br>
I do not know what we need :(
<br>
<br>
In the past we have been using the FT_particles and when
looking at REC_ForwardTagger, things seem much different. I do
not know if things are better or worse if using
REC_ForwardTagger.
<br>
<br>
I can say that the duplicates in REC_ForwardTagger are going
to make life a bit of a pain.
<br>
<br>
Take care,
<br>
Michael
<br>
<br>
<blockquote type="cite">On Thu, 6 Sep 2018, Will Phelps wrote:
<br>
<br>
Hello Michael,
<br>
<br>
I think we need to include Raffaella and the FT group in our
discussions about the banks. I think most people are under
the impression that Rec:ForwardTagger and Rec:particles are
all you need for the forward tagger. Is this the case?
<br>
<br>
-Will
<br>
<br>
Sent from my iPhone
<br>
<br>
<blockquote type="cite">On Sep 6, 2018, at 7:43 PM, Michael
Dugger <a class="moz-txt-link-rfc2396E" href="mailto:dugger@jlab.org"><dugger@jlab.org></a> wrote:
<br>
<br>
<br>
Hi,
<br>
<br>
Just started looking at REC_ForwardTagger stuff and there
is a bunch of duplicate hits.
<br>
<br>
Here is an example event with 6 hits showing up for
TEC_ForwardTagger:
<br>
<br>
ftTime, ftEnergy = 178.399 , 2.91067
<br>
ftTime, ftEnergy = 180.169 , 5.4406
<br>
ftTime, ftEnergy = 178.399 , 2.91067
<br>
ftTime, ftEnergy = 180.169 , 5.4406
<br>
ftTime, ftEnergy = 178.399 , 2.91067
<br>
ftTime, ftEnergy = 180.169 , 5.4406
<br>
<br>
As you can see, there is actually only two unique hits!
<br>
<br>
This looks like it will be pain to sort through :(
<br>
<br>
Take care,
<br>
Michael
<br>
<br>
<br>
<br>
<br>
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