Fragmentation in Property: Towards a General Model

Fragmentation in property: Towards a general model

Towards a Fragmentation Model for Sherpa A

Some results highlighting the status of a new version of a cluster fragmentation model for the Monte Carlo event generator Sherpa are presented. In its present version this model is capable of simulating e + e − annihilation events into light-quark and gluon jets. We compare results for different multiplicity and momentum distributions to available SLD and LEP data as well as to results obtaine...

Eigenelements of a General Aggregation-Fragmentation Model

We consider a linear integro-differential equation which arises to describe both aggregationfragmentation processes and cell division. We prove the existence of a solution (λ,U , φ) to the related eigenproblem. Such eigenelements are useful to study the long time asymptotic behaviour of solutions as well as the steady states when the equation is coupled with an ODE. Our study concerns a non-con...

Towards Model-based Management of Database Fragmentation

The performance of a database can significantly deteriorate due to the fragmentation of data/index files. Manual database defragmentation and performance optimization remain time consuming and even infeasible as it requires knowledge of the complicated behavior of fragmentation and its relationships with system parameters. We propose a model-based detection and management framework for the data...

Towards a model independent approach to fragmentation functions

We show that the difference cross sections in unpolarized SIDIS e+N → e+h+X and pp hadron production p + p → h + X determine independently in a model independent way, in any order in QCD, the two FFs: D u andD h−h̄ d , h = π , K or a sum over charged hadrons. If bothK andK s are measured, then e e → K+X, e+N → e+K +X and p+ p → K +X present independent measurements of just one FF: D +K u−d . The...