ToDo.md

ToDo List - CERN Summer Student Programme

$1^{st}$ Week 12/06 - 16/6

FirstPlots

• Plot $m(D^0)$
• Plot $m(D^\star)$
• Plot the mass difference of the two
• Plot Transverse momentum of $D^0$ and of the soft $\pi$ and $K$ mesons
• Histograms with errorbars (sqrt)
• 2D Histogram for $p_x - p_z$

$2^{nd}$ Week 19/06 - 23/06

ChargedPi

• Copy TTree to a new file
• Add random charges to soft $\pi$ with uniform distribution\
• Generate data with RapidSim for $D^{\star}\rightarrow {D^0 \rightarrow \pi^-\pi^+}\pi$
• Use $0.25$ as production asymmetry, i.e., production of $D^0$ and $\bar{D}^0$, the probability then should be $N_\pm = \frac{1 \pm A}{2}$.
• Save this to a new intermediate TTree in a ROOT file
• Use $0.50$ as $CP$ asymmetry, i.e., asymmetry between $D^0 \to K^- K^+$ and $\bar{D}^0 \to K^- K^+$. This should remove either positively charged or negatively charged $\pi$ events. The probability for the $D^0$ is $\frac{1-A_{CP}}{1 + A_{CP}}$

$3^{rd}$ Week 26/06 - 30/06

ChargedPi

• Assign detection asymmetry to the charged pion. Same function as the $CP$ asymmetry.
• Same asymmetries with different $A_{CP}$ but for the $D^0\rightarrow \pi^-\pi^+$ TTree.

ComparisonPlots

• Generate data with RapidSim for $\eta$ and $\phi$ for all particles.
• Compare $p, p_T, \eta, \phi$ of the $D^\star$ and soft $\pi$ for the two decays $D^0\to K^-K^+$ and $D^0\to \pi^-\pi^+$
• Add error bars to the comparison plots.

FirstPlots

• $p_x-p_z$ histogram for soft $\pi$

$4^{th}$ Week 03/07 - 07/07

MomentumDependence

• Add 0 production asymmetry, and the same detection asymmetry for both $D^0\to K^-K^+$ and $D^0\to \pi^-\pi^+$ with momentum dependence
• Add different $CP$ asymmetry to the two sets with a large value
• Calculate total asymmetry and uncertainty
• Try to add negative $CP$ asymmetry (Not necessary)
• Solve multithreading problem (Not necessary)
• Calculate integrated detection asymmetry
• Calculate total asymmetry with the correct formula and uncertainty due to the integrated detection asymmetry
• Create LaTeX report for this week

$5^{th}$ Week 10/07 - 14/07

MomentumDependence

• Add more bins to the detection asymmetry histogram
• Minor stuff on LaTeX report
• Save final TTrees in new files

WeightingFunction

• Create normalized 3d distributions according to the Decay formalism pdf
• Equalize $KK$ and $\pi\pi$ distributions
• Increase statistics for Weighting function using RapidSim
• Fix NaN weight problem
• Fix other weight problems
• Plot some kinematics

CDS Report

• Begin writing the CDS Report.
• Add introduction and motivation
• Add $\Delta A_{CP}$ formalism and the weighting function

FullAnalysis

• 1 and -1 detection asymmetry for up and down on $p_x-p_z$ plane (optional)
• 5th week LaTeX report
• Compare $\Delta A_{\text{total}}$ and $\Delta A_{CP}$ before and after applying the weights
• Put everything in the CDS Report
• First introduce CP, calculate weights, then introduce the detection asymmetry and then apply the weights on the detection asymmetry sample.

$6^{th}$ Week 17/07 - 21/07

WeightingFunction

• Check weighting function regarding $\phi$
• Write $6^{th}$ week report
• Calculate $\Delta A$ with uncertainty
• Generate new high statistics samples for analysis for $D^0\to K^-K^+$ and $D^0\to \pi^-\pi^+$ decay modes
• Check asymmetries for new high statistics samples and compare with low statistics

CDS Report

• Begin writing the CDS Report.
• Add introduction and motivation.
• Feynman diagrams
• Add $\Delta A_{CP}$ formalism and the weighting function
• Add analysis section
• Add RapidSim section

LaTeX Report

• Add $\Delta A$ calculation and compare with the expected value

$7^{th}$ Week 24/07 - 28/07

NewWeightingFunction

• Calculate weighting function without detection asymmetry
• Calculate $\Delta A_{total}$

LaTeX Report

• Write report for this week with plots and results.

PGunAnalysis

• Caluclate $A_{total}$ for $KK$ and $\pi\pi$ and $\Delta A_{total}$
• Calculate Weights $p_T, \eta \phi$ from $D^0$ and add the weight to $D^\star$
• Calculate the $\Delta A_{total}$
• Calculate weights $p_T, \eta, \phi$ from $D^\star$ and add the weights to $D^\star$
• Calculate the $\Delta A_{total}$
• Make plots for detection asymmetry

CDS Report

• Add detection asymmetry plots on the report.
• Add Particle Gun analysis and results.
• Fix what we discussed with Federico