6533b861fe1ef96bd12c44ec
RESEARCH PRODUCT
Hard diffraction in photoproduction with Pythia 8
Ilkka HeleniusIlkka HeleniusChristine O. Rasmussensubject
DiffractionParticle physicsPhysics and Astronomy (miscellaneous)FOS: Physical scienceslcsh:Astrophysicshiukkasfysiikka01 natural sciencesGamma gammaHigh Energy Physics - ExperimentHigh Energy Physics - Experiment (hep-ex)High Energy Physics - Phenomenology (hep-ph)Factorization0103 physical scienceslcsh:QB460-466photonslcsh:Nuclear and particle physics. Atomic energy. Radioactivityparticle physics010306 general physicsNuclear ExperimentEngineering (miscellaneous)Event generatorPhysicsLarge Hadron Colliderfotonit010308 nuclear & particles physicsHERAHigh Energy Physics - PhenomenologyGeneral purposelcsh:QC770-798High Energy Physics::ExperimentBeam (structure)description
We present a new framework for modeling hard diffractive events in photoproduction, implemented in the general purpose event generator Pythia 8. The model is an extension of the model for hard diffraction with dynamical gap survival in pp and ppbar collisions proposed in 2015, now also allowing for other beam types. It thus relies on several existing ideas: the Ingelman-Schlein approach, the framework for multiparton interactions and the recently developed framework for photoproduction in gamma p, gamma gamma, ep and $e^+e^-$ collisions. The model proposes an explanation for the observed factorization breaking in photoproduced diffractive dijet events at HERA, showing an overall good agreement with data. The model is also applicable to ultraperipheral collisions with pp and pPb beams, and predictions are made for such events at the LHC.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2019-05-01 |