26-30 April 2009
Palacio de Congresos de Madrid
Europe/Zurich timezone

Global PDF analysis in an intermediate-mass scheme

28 Apr 2009, 17:15
15m
Room "SALA 8" (Palacio de Congresos de Madrid)

Room "SALA 8"

Palacio de Congresos de Madrid

Paseo de la Castellana, 99 28046 Madrid España

Speaker

Pavel Nadolsky (Southern Methodist University)

Description

The zero-mass (ZM) parton formalism is widely used in high-energy physics because of its simplicity and historical importance, even while the latest global QCD analyses are carried out in the more precise general-mass (GM) QCD formalism. We explore the possibility of rectifying obvious kinematical inconsistencies of the conventional implementation of the ZM formalism, while preserving the simplicity of its matrix elements. The resulting intermediate-mass (IM) scheme for perturbative QCD calculation can be regarded either as an improved ZM formulation with the correct treatment of heavy-flavor final state kinematics; or, alternatively, as a simplifed GM formulation with approximate ZM hard cross sections. I discuss representative global analyses based on the IM formulation, and show that they come quite close to reproducing the more accurate GM results.

Primary author

Pavel Nadolsky (Southern Methodist University)

Presentation Materials