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Profile picture of Leif Lönnblad. Photo.

Leif Lönnblad

Professor of Theoretical Physics

Profile picture of Leif Lönnblad. Photo.

Inclusion of the 3P0 model in PYTHIA 8


  • Albi Kerbizi
  • Leif Lönnblad

Summary, in English

The spin effects in the hadronization process have been included for the first time in the PYTHIA 8 event generator. The spin effects are limited to the production of pseudo-scalar mesons and are obtained from the propagation of the quark polarization along the fragmentation chain according to the rules of the so-called 3P0 model. The interface between PYTHIA 8 and the package of the 3P0 model is presented together with preliminary results on the Collins and di-hadron asymmetries as obtained from simulations of the transversely polarized semi-inclusive deep inelastic scattering process.


  • Theoretical Particle Physics

Publishing year




Document type

Conference paper


  • Subatomic Physics

Conference name

27th International Workshop on Deep-Inelastic Scattering and Related Subjects, DIS 2019

Conference date

2019-04-08 - 2019-04-12

Conference place

Torino, Italy