(r25) LowPtSoftware < CMS

CMS Web>TrackerSoftware >LowPtSoftware (revision 25) (raw view)~~EditAttach~~
---++!!Low p<sub>T</sub> development

%TOC%

---+++QM'06 Posters
   * [[http://cmsinfo.cern.ch/outreach/CMSdocuments/CMSposters/CMSposters_index.html][CMS posters]]
   * [[https://uimon.cern.ch/twiki/bin/view/CMS/AllAbstractsQM2006][CMS HI posters]] %BR%
     F. Siklér: Low p<sub>T</sub> Hadronic Physics with CMS
---+++CMSSW Software

---++++Minimizers
   * http://seal.web.cern.ch/seal/MathLibs/5_0_8/Minuit2/html/classROOT_1_1Minuit2_1_1VariableMetricMinimizer.html
   * http://seal.web.cern.ch/seal/MathLibs/5_0_8/Minuit2/html/classROOT_1_1Minuit2_1_1FunctionMinimum.html

---++++Low p<sub>T</sub> tracking
   * !RecoTracker/TkTrackingRegions %BR%
      !GlobalTrackingRegion.h is modified to lower ptMin %BR%
<blockquote><verbatim>
  GlobalTrackingRegion ( float ptMin = 0.075, float originRadius = 0.2,
</verbatim></blockquote>
   * !RecoPixelVertexing/PixelTriplets
   * !RecoPixelVertexing/PixelLowPtUtilities
   * !RecoPixelVertexing/PixelTrackFitting %BR%
      !PixelFitterByHelixProjections.{cc,h} is modified for correct calculation of cot&#952; %BR%
<blockquote><verbatim>
float PixelFitterByHelixProjections::cotTheta
  (const vector<GlobalPoint> & points,
   float radius, float phi, float d0, float& zip) const
...
   float chi = phi - M_PI_2;
   GlobalPoint IP(d0*cos(chi), d0*sin(chi),zip);

   float phi1 = 2*asin(0.5*(gp1 - IP).perp()/radius);
   float phi2 = 2*asin(0.5*(gp2 - IP).perp()/radius);

   float dr = radius*(phi2 - phi1);
   float dz = gp2.z()-gp1.z();

   // Recalculate ZIP
   zip = (gp1.z()*phi2 - gp2.z()*phi1)/(phi2 - phi1);
</verbatim></blockquote>

---++++V0
   * !DataFormats/VZero
   * !RecoVZero/VZeroFinding

---++++dE/dx
   * !RecoPixelVertexing/PixelLowPtUtilities

---++++Association
   * !SimTracker/TrackerHitAssociation %BR% get from cvs
   * !SimTracker/TrackAssociation %BR% get from cvs

---+++Vertices
LowPtVertices

---+++Event galleries
EventGallery EventGalleryDijet
[[http://twiki.org/cgi-bin/view/Plugins/BatchUploadPluginDev][BatchUploadPlugin dev]]

---+++Links
   * [[http://cmslxr.fnal.gov/lxr/source/?v=CMSSW_1_2_0_pre1][CMSSW source browser (1_2_0_pre1)]]
   * [[https://twiki.cern.ch/twiki/bin/view/CMS/CMSSW_aptinstaller][Instructions]]
   * [[http://wwwvis.informatik.uni-stuttgart.de/~kraus/LiveGraphics3D/index.html][LiveGraphics3D]] %ATTACHURL%/livetiny.gif [[http://www.math.umn.edu/~rogness/lg3d/page_Introduction.html][Tutorial]]
   * Big pixels [[http://hep.pha.jhu.edu/~morris/reconstruct_big_pix.pdf][%ICON{pdf}%]] [[https://twiki.cern.ch/twiki/pub/CMS/PixelRecHits/FPIX-pixel-sizes.pdf][%ICON{pdf}%]]

---+++Unfolding
   * András László: A robust iterative unfolding method for signal processing [[http://arxiv.org/abs/math-ph/0601017][math-ph/0601017]] [[http://stacks.iop.org/0305-4470/39/13621][J Phys A]]
   * András László: Deconvolution method, its application for photons, pi0s [[http://indico.cern.ch/materialDisplay.py?contribId=s1t7&materialId=0&confId=a053845][%ICON{pdf}%]]

---+++Installation

---++++Standalone install on debian
SLC3 machine:
<blockquote><verbatim>
% setenv VO_CMS_SW_DIR <directory>
% setenv SCRAM_ARCH slc3_ia32_gcc323
% mkdir $VO_CMS_SW_DIR
% wget -O $VO_CMS_SW_DIR/aptinstaller.sh \
  http://cmsdoc.cern.ch/cms/cpt/Software/download/cms/aptinstaller.sh
% chmod +x $VO_CMS_SW_DIR/aptinstaller.sh
% $VO_CMS_SW_DIR/aptinstaller.sh setup -unsupported_distribution_hack \
  -repository cms -path $VO_CMS_SW_DIR
% eval `$VO_CMS_SW_DIR/aptinstaller.sh config -path $VO_CMS_SW_DIR -csh`
% apt-get update
% apt-cache search cmssw
% apt-get install cms+cmssw+CMSSW_1_2_0_pre1
</verbatim></blockquote>

Debian machine:
<blockquote><verbatim>
% setenv SCRAM_ARCH slc3_ia32_gcc323
% setenv VO_CMS_SW_DIR <directory>
% source $VO_CMS_SW_DIR/cmsset_default.csh
% scramv1 project CMSSW CMSSW_1_2_0_pre1
</verbatim></blockquote>

   * Install libboost-dev.

---+++Pixel clusters

---++++Pixel digitizer
CMSSW/SimTracker/SiPixelDigitizer/data/PixelDigi.cfi
<blockquote><verbatim>
int32 AddPixelInefficiency = 0 // static loss only, v.low lumi
bool AddNoisyPixels = true
bool !MissCalibrate = true
</verbatim></blockquote>

---++++Pixel clusterizer
CMSSW/RecoLocalTracker/SiPixelClusterizer/src/PixelThresholdClusterizer.cc %BR% in make_cluster change
<blockquote><verbatim>
268     for ( int r = curpix.row()-2; r <= curpix.row()+2; r++) {
269       for ( int c = curpix.col()-2; c <= curpix.col()+2; c++) {
</verbatim></blockquote>

---+++Cluster shape

---+++Hit triplets

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-- Main.FerencSikler - 16 Oct 2006
Attachments
Topic attachments
I	Attachment	History	Action	Size	Date	Who	Comment
zip	event.zip	r1	manage	14.0 K	2006-11-07 - 12:53	FerencSikler
Topic revision: r25 - 2006-12-06 - FerencSikler
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