Correction Methods for Finite-acceptance Effects in Two-particle Correlation Analysis

20 May 2014, 16:30
2h
spectrum (darmstadtium)

spectrum

darmstadtium

Board: I-26
Poster Correlations and Fluctuations Poster session

Speaker

Saehanseul Oh (Yale University (US))

Description

Two-particle correlations have been widely used as a tool to explore particle production mechanisms in heavy ion collisions. The mixed-event method is generally considered as a standard method to correct correlation functions for effects of finite acceptance. We demonstrate that additive correlated signals, such as jets, are distorted by the mixed-event method and propose new methods for more accurate finite-acceptance corrections and background-rejection effects. Correlation functions from the mixed-event method and the proposed new methods are compared through particle-level PYTHIA simulations containing well-defined correlation signals. Significant differences are observed at large $\Delta\eta$ in general and especially in the case of an asymmetric particle distribution like that observed in proton-lead collisions. The applicability and validity of the new methods are discussed in detail.
On behalf of collaboration: None

Primary author

Saehanseul Oh (Yale University (US))

Co-authors

Dr Andreas Morsch (CERN) Constantinos Loizides (Lawrence Berkeley National Lab. (US)) Tim Schuster (Yale University (US))

Presentation Materials