Analysis Centre Seminar: "Heavy-flavor treatment at NNLO in CTEQ PDF analysis"

by Marco Guzzi (Southern Methodist University)

Tuesday 24 Apr 2012, 16:00 → 17:00 Europe/Berlin

Lecture Hall (DESY)

Correct computation of heavy-quark contributions to deep-inelastic scattering in the global PDF analysis is essential for predicting precision cross sections for W and Z boson production at the LHC. Quark mass effects on DIS cross sections are comparable to next-to-next-to leading order (NNLO) contributions, therefore they must be included consistently in perturbative computations. We illustrate the S-ACOT-\chi scheme which is the default general-mass framework of CTEQ global PDF analyses and it is an improved formulation of the original ACOT scheme. We discuss an NNLO realization of S-ACOT-\chi for treatment of heavy-flavour production in neutral current deep-inelastic scattering. Practical implementation of the NNLO calculation is also illustrated on the example of semi-inclusive structure functions F2c(x,Q) and FLc(x,Q). ============================ EVO connection: Title: Analysis Centre Seminars Description: Analysis Centre Seminars Community: Terascale Phone Bridge ID: 1312410 Meeting URL: http://evo.vrvs.org/evoGate/koala.jnlp?meeting=MaMDMt222sDeDi9M98DI9a