Parametric simulation

Revision as of 17:17, 25 July 2018

Particle propagation is done by geometry calculation. To valid the calculation several different cases were plotted.

Helix.

cd heppy

source init.sh

cd test

./heppy_loop.py ../../output/ ctau_cfg1.py

./txt2rtee.py

The output tree contains branches which can be divided in several groups:

reconstructed particle parameters;
generated particle parameters;
generated vertices;
connection between reconstructed particles, generated particles and generated vertices.

The table below presents branches and description of their content.

Name	Type	Length	Description
Reconstructed particles
n	int	1	The number of reconstructed particles.
px	float []	n	The reconstructed particle momentum: x coordinate.
py	float []	n	The reconstructed particle momentum: y coordinate.
pz	float []	n	The reconstructed particle momentum: z coordinate.
Generated particles
n0	int	1	The number of generated particles.
px0	float []	n0	The generated particle momentum: x coordinate.
py0	float []	n0	The generated particle momentum: y coordinate.
pz0	float []	n0	The generated particle momentum: z coordinate.
Generated vertices
nv0	int	1	The number of generated vertices.
vx0	float []	nv0	The generated vertex: x coordinate.
vy0	float []	nv0	The generated vertex: y coordinate.
vz0	float []	nv0	The generated vertex: z coordinate.
Links
recgen	int []	n	Transform a reconstructed particle index to the generated particle index.
genver	int []	n0	Transform a generated particle index to the generated vertex index.

Here a short analysis example of $D^0 \to K_S^0 \pi^+ \pi^-$ is presented. The things are performed with PyROOT.

The data a taken from the available exclusive sample.

The code can be taken from github [1] or find at the stark cluster: /home/razuvaev/myheppy/search_dkspipi.py.

@@ Line 123: / Line 123: @@
 ==Analysis example==
+Here a short analysis example of
+<math>D^0 \to K_S^0 \pi^+ \pi^-</math>
+is presented.
+The things are performed with PyROOT.
+The data a taken from the available
+[[MC_Data_Sets#Exclusive_samples|exclusive sample]].
+The code can be taken from github
+[https://github.com/lbrl/sctau_py/blob/master/search_dkspipi.py]
+or find at the stark cluster:
+''/home/razuvaev/myheppy/search_dkspipi.py''.
+<gallery>
+File:Dkspipi_mksmd0.png|alt=mksmd0.|<math>K_S^0</math> mass vs <math>D^0</math> mass.
+File:Dkspipi_md0pd0.png|alt=md0pd0.|<math>D^0</math> mass vs its momentum.
+</gallery>