The midpoint between dipole and parton showers

The European Physical Journal C

Stefan Prestel¹  Stefan Höche¹ 

[1] SLAC National Accelerator Laboratory, 94025, Menlo Park, CA, USA;

关键词: Transverse Momentum;    Anomalous Dimension;    Evolution Variable;    Parton Shower;    Splitting Function;   

DOI  :  10.1140/epjc/s10052-015-3684-2

来源: Springer

【 摘 要 】

We present a new parton-shower algorithm. Borrowing from the basic ideas of dipole cascades, the evolution variable is judiciously chosen as the transverse momentum in the soft limit. This leads to a very simple analytic structure of the evolution. A weighting algorithm is implemented that allows one to consistently treat potentially negative values of the splitting functions and the parton distributions. We provide two independent, publicly available implementations for the two event generators Pythia and Sherpa.

【 授权许可】

CC BY