Evolution of parton showers and parton distribution functions

Nagy, Zoltán; Soper, Davison E.

doi:10.1103/PhysRevD.102.014025

Journal Article

PUBDB-2020-03007

Evolution of parton showers and parton distribution functions

Nagy, Z. (Corresponding author)DESY* ; Soper, D. E. (Corresponding author)

2020
Soc. [S.l.]

Physical review / D 102(1), 014025 (2020) [10.1103/PhysRevD.102.014025]

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Please use a persistent id in citations: doi:10.1103/PhysRevD.102.014025 doi:10.3204/PUBDB-2020-03007

Report No.: DESY-20-015; arXiv:2002.04125

Abstract: Initial state evolution in parton shower event generators involves parton distribution functions. We examine the probability for the system to evolve from a higher scale to a lower scale without an initial state splitting. A simple argument suggests that this probability, when multiplied by the ratio of the parton distributions at the two scales, should be independent of the parton distribution functions. We call this the PDF property. We examine whether the PDF property actually holds using pythia and deductor. We also test a related property for the deductor shower and discuss the physics behind the results.

Keyword(s): quantum chromodynamics: perturbation theory ; parton: distribution function ; parton: showers ; initial state ; evolution equation ; Monte Carlo ; PYTHIA ; splitting

Classification:

ddc:530

Note: 19 pages, 8 figures, including an appendix; close to accepted version ; publication: Phys.Rev. D102 1 (2020) 014025 ; ;

Contributing Institute(s):

Theorie-Gruppe (T)

Research Program(s):

611 - Fundamental Particles and Forces (POF3-611) (POF3-611)

Experiment(s):

No specific instrument

Appears in the scientific report 2020

Database coverage:
Medline

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