Motivation:

Ridge in p+p 200 GeV with Ntrk > 50?

Dataset:

run 12 pp 200GeV

trigger:
TOF4 (tofmult>50, no vpd requirement)

Dihadron azimuthal correlation is done for events with primary tracks in TPC larger than 50.
 

QA: drupal.star.bnl.gov/STAR/blog/yili/run12-pp-200gev-high-multiplicity-trigger 
drupal.star.bnl.gov/STAR/blog/yili/run12-pp-200gev-high-multiplicity-trigger-pt-distribution

For d+Au ridge paper: www.star.bnl.gov/protected/bulkcorr/yili/dAuRidge/dAuridgepaper.html
 

Result:

BEMC matching is required for TPC tracks. No BEMC matching effiency is corrected. 

Delta phi distribution