Ordering variable for parton showers

Abstract

The parton splittings in a parton shower are ordered according to an ordering variable, for example the transverse momentum of the daughter partons relative to the direction of the mother, the virtuality of the splitting, or the angle between the daughter partons. We analyze the choice of the ordering variable and conclude that one particular choice has the advantage of factoring softer splittings from harder splittings graph by graph in a physical gauge.

28 pages, 5 figures

References in corpus (11)

• Event generation with SHERPA 1.1
• Herwig++ Physics and Manual
• A parton shower algorithm based on Catani-Seymour dipole factorisation
• The CCFM Monte Carlo generator CASCADE 2.2.0
• Parton showers with quantum interference
• Parton showers with quantum interference: leading color, with spin
• A parton shower based on factorization of the quantum density matrix
• Parton showers with quantum interference: leading color, spin averaged
• Monte Carlo and large angle gluon radiation
• Revisiting Radiation Patterns in $e^{+}{e}^{-}$ Collisions
• Final state dipole showers and the DGLAP equation

Cited by in corpus (15)

• Logarithmic accuracy of parton showers: a fixed-order study
• Parton showers with more exact color evolution
• Summations of large logarithms by parton showers
• Matching the Nagy-Soper parton shower at next-to-leading order
• PanScales parton showers for hadron collisions: formulation and fixed-order studies
• What is a parton shower?
• On stochastically sampling color configurations
• Jets and threshold summation in Deductor
• Summing threshold logs in a parton shower
• Evolution of parton showers and parton distribution functions
• Effect of color on rapidity gap survival
• Final-state QED Multipole Radiation in Antenna Parton Showers
• Measurement of observables sensitive to coherence effects in hadronic Z decays with the OPAL detector at LEP
• Multivariable evolution in final state parton shower algorithms
• Multivariable evolution in parton showers with initial state partons