We present a new framework for modeling hard diffractive events in
photoproduction, implemented in Pythia 8.
We introduce a symmetric frame to study the interactions of a system of two strings for the string shoving mechanism within the Lund model. Considering all such pairs of string pieces in a collision, the resulting total momentum change on all such string pieces will be calculated.
Monte Carlo Event Generators are important tools to understand the physics of particle colliders. Due to the complexity of particle collisions and the limited ability of perturbative QCD to describe the low energy behavior of partons, we need phenomenological models to provide a complete prediction of many observables. A systematic tuning of model parameters based on experimental data allows...
A report of my experience at the consulting company B12 in the MCnet program for non-academic secondments.
In spite of the recent progress in both theoretical and experimental studies many aspects of multiple parton interactions (MPI) still require a detail investigation. In particular, double parton scattering (DPS) processes can play a dominant role for some specific kinematic regions of multi-jet production, especially in proton-nucleus (pA) collisions where the total DPS cross section...
Multiple parton interactions and, more specifically, double parton scattering are usually suppressed by single parton scattering. However, in some specific regions of phase-space, the differential cross sections are comparable. Also, for a given final state, it might happen that the double parton scattering is the dominant contribution if the single parton scattering is suppressed by a higher...
The Vincia antenna shower is a plugin to Pythia which allows for multiple matrix-element corrections (MECs), as well as systematic shower uncertainty estimates. In this talk I will discuss the former, with a particular emphasis on how we used maximally-helicity-violating (MHV) amplitudes for the MECs. Finally, I will show a new ATLAS result for gluon splitting to b quarks which appears to...
The future of parton showers is centered around increasing the accuracy and comparison to data especially as higher precision and higher orders become more important. In this talk I will present my work on the determination of emission kernels, focusing on the two emission case, and some of the necessary steps involved in the process.
I present SingularPhasepace, a new hard process event generator soon to be implemented in Herwig. It will generate events that push steadily into a singular limit, whilst keeping as much fixed as possible. This will make it easier to test and validate Herwig's use of Matrix Elements and the Dipole Subtraction algorithm.
I review an ongoing pheno study, in which my collaborators and I explore if the experimental bounds on the Higgs decay width could potentially be improved by exploiting interference effects of the $pp \to H \to \gamma\gamma$ signal with the $pp \to \gamma\gamma$ continuum background. We use particle-level simulated data using SHERPA and a complete likelihood analysis to derive the expected...
