phi-meson Spin Alignment Code

TreeProduction:

• reconstrut event plane => ZDC-SMD (1st) and TPC (2nd)
• reconstrut phi-meson => Same Event and Mixed Event
• save event plane and reconstruted phi-meson into TTree

FillSpinAlignment:

• read in phi-meson TTree
• boost K+ back into phi-meson rest frame
• correlate phi-meson and event plane with K+ (cos(theta*))
• save histogram

CalSpinAlignment:

• subtract background from Mixed Event
• extract raw spin alignment signal
• apply TPC efficiency correction
• apply MC event plane resolution correction
• calculate systematic error

Embedding

• read in STAR embedding TTree
• find MC tracks and corresponding RC tracks
• Save all relavent information to TNtuple

RcPhiEffCorr

• read in TNtuple from Embedding process
• apply same cut as picoDst data analysis
• extract TPC efficiency for K+/K-
• generate phi-meson through MC and let it decay with PHYTIA
• apply K+/K- TPC effciency to decay daugthers and reconstruct phi-meson
• extract TPC efficiency for phi-meson

McPhiResCorr

• generate phi-meson through MC with STAR published spectra and v2
• let phi-meson decay with PHYTIA and boost K+ back to phi-meson rest frame
• correlate phi-meson with fixed event plane (Psi = 0)
• smear event plane with measured event plane resolution
• correlate rho_00^phy with rho_00^obs to extract event plane resolution correction factor

Utility

• constant used in VecMesonSpinAlignment
• functions used in VecMesonSpinAlignment
• custom defined fype used in VecMesonSpinAlignment

PlotMacro

• macros to plot QA and final figures for rho_00 vs energy with sysErrors

figures

• place to save QA and final plots