Some remarks on dipole showers and the DGLAP equation

Journal Article · Wed Apr 01 00:00:00 EDT 2009 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.79.074021· OSTI ID:21308175

Skands, Peter ^[1]; Weinzierl, Stefan ^[2]

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1. Theoretical Physics, Fermilab, MS 106, Box 500, Batavia, Illinois 60510 (United States)
2. Institut fuer Physik, Universitaet Mainz, D - 55099 Mainz (Germany)

It has been argued recently that parton showers based on color dipoles conflict with collinear factorization and do not lead to the correct Dokshitzer-Gribov-Lipatov-Altarelli-Parisi (DGLAP) equation. We show that this conclusion is based on an inappropriate assumption, namely, the choice of the gluon energy as evolution variable. We further show numerically that Monte Carlo programs based on dipole showers with 'infrared-sensible' evolution variables reproduce the DGLAP equation both in asymptotic form as well as in comparison to the leading behavior of second-order QCD matrix elements.

• OSTI ID: 21308175
• Journal Information: Physical Review. D, Particles Fields, Vol. 79, Issue 7; Other Information: DOI: 10.1103/PhysRevD.79.074021; (c) 2009 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ASYMPTOTIC SOLUTIONS
COLOR MODEL
COMPARATIVE EVALUATIONS
DIPOLES
EQUATIONS
FACTORIZATION
GLUONS
MATRIX ELEMENTS
MONTE CARLO METHOD
QUANTUM CHROMODYNAMICS
SHOWERS