A to Zh Tutorial Progress John W. Spencer

Objective Simulate A to Zh process Filter out background process

Preliminaries / Motivation To simulate pp > A > Zh process requires a proper framework of software in place C++ / Linux / ROOT Obtained through tutorials and practice Underlying Collider Physics arxiv.org/pdf/1002.0274v2.pdf cds.cern.ch/record/1637776/files/HIG-13-025-pas.pdf

Linux, C++, ROOT Crash incapacitates Windows 2003 computer Running Linux via Cygwin terminal on Windows 7 laptop Installed / Using Windows version of ROOT6 while setting up Linux

MadGraph Responsible for Monte Carlo simulations Generates events from input models and definitions MadGraph simulates on parton level Individual quarks/gluons show up, violating colour Events output to LHE File

Pythia Continues the simulation from MadGraph Color/charge of partons causes radiation of gluons/leptons, further decays cascade Output saved to LHE and HEP files Requires code modification before compiling Note: This code may not be needed in the future $ awk '{gsub("LINKS = mass_width_2004.mc pgs clean_output PDFsets pydata.f", "LINKS = mass_width_2004.mc PDFsets pydata.f")}1' Makefile > Makefile_tmp && mv Makefile_tmp Makefile

Delphes Takes HEP file as input and outputs ROOT file Simulates the detector response to the particle shower from earlier stages of simulation Real detectors have difficulty measuring low pT and high η so Delphes simulates this with variable detection efficiency Also implements smearing to simulate uncertainty in measured energies/momenta

Issues and Difficulties ROOT cannot compile “recipe for target 'core/utils/src/rlibmap.o' failed” Currently looking into solutions Apparent ROOT/Cygwin compatibility problem Macros don’t run in ROOT for Windows Local glitch, works on other windows machines

Current Status / Future Goals Currently finishing Level 1 Resolve technological obstacles and OS problems Move on to actual simulation within next few days Work on truth particle study by next week