The week-long workshop on Correlations in Partonic and Hadronic Interactions (CPHI-2020) will take place at CERN in Geneva, Switzerland, from February 3rd to 7th, 2020.
The workshop follows those held in 2018 and 2009 in Yerevan (Armenia).
Recently, significant disagreements have been reported in comparison of theoretical predictions, based on combination of TMD factorization and collinear factorization and experimental measurements for various transverse momentum distributions of hadrons in lepton-nucleon, electron-positron, and dileptons in DY process. Those observations emerge into a new crisis, the "qT -crisis". Correlations in partonic and hadronic interactions, which may be responsible for observed disagreements, provide important information on underlying dynamics, manifesting themselves in variety of observables widely recognized as key objectives of the forthcoming COMPASS (CERN) polarized deuteron run in 2021, JLab 12 GeV upgrade and a driving force behind construction of the Electron Ion Collider (BNL) and Spin Physics Detector (SPD) at the NICA facility (JINR).
The workshop will focus on the steps needed for development of theory and phenomenology involved in the extraction of TMDs and GPDs from existing and future data from lepton-nucleon, electron-positron and hadron-hadron facilities at BNL, CERN, DESY, FNAL, JINR, JLab, and KEK, with controlled systematics over various assumptions involved in the process.