ResBos input grids for W and Z boson production at the Large Hadron Collider =========================================================================== For explanation of subdirectories, see below This directory contains general-purpose grids for the resummed (NNLL/NLO or NNLL/high-QT NNLO) cross sections, as well as is input grids for fixed-order (LO, NLO) cross sections. Compatibility: ResBos and ResBos-A v.1.0.0 The naming conventions are as follows: w321_z0_lhc_cteq66_kn00.out.bz2 | | | | | | | | | | | | | |-------------- bzip2'ed ResBos grid | | | | |----------------------- kn00: ID of the nonperturbative Sudakov | | | | function (central set) | | | |--------------------------- PDF set name | | ----------------------------------- LHC, 14 TeV | --------------------------------------- w+/w-/z0/a0/ZA: | W+, W-, Z0, photon, or Z-photon interf. ---: w321 -- CSS piece with A,B,C functions evaluated up to orders 3,2, and 1 or y -- Y piece evaluated up to NLO Naming conventions for individual grids: w321 -- CSS piece with A,B,C functions evaluated up to orders 3,2, and 1 y (yk) -- Y piece evaluated up to NLO (NNLO) lo -- leading-order cross section asy -- NLO asymptotic piece dsi -- small-qT bin for the NLO cross section (so called Delta Sigma) These grids are computed under typical theoretical assumptions about the resummed cross sections using the resummation program Legacy described in G. A. Ladinsky, C.-P. Yuan, Phys. Rev. D50 4239 (1994); F. Landry et al., Phys.Rev. D67, 073016 (2003). All grids are calculated using 45 CTEQ6.6 PDF sets. The resummed piece (w321) is calculated using the nonperturbative function KN1 described in A.Konychev, P. Nadolsky, Phys. Lett. B633, 710 (2006). Please acknowledge these references in your publication. Contents ============== Files in the top directory: NLO grids for the central CTEQ6.6 PDF set 45_PDFs/ grids for 44+1 CTEQ6.6 PDF error sets nnlo_kfactor/ grids with NNLO K-factor at large QT other/ grids for non-CTEQ6.6 PDF sets Procedures for calculating the cross sections using these grids are described in the header of resbos.for. Hints =========================== * Combinations of input grids needed to compute various cross sections Type of the Primary grid Secondary grid returned cross section file name file name or '-' ----------------------------------------------------------------- Resummed, matched to PERT w321_... y_... LO lo_... - NLO: qT > qT_sep asy_... y_... qT < qT_sep dsi_... - Resummed only w321_... - ============================= * The NLO cross section is computed using the phase space slicing method in two intervals qT > qT_sep and qT < qT_sep, where the value of qT_sep is specified in resbos.in ============================= * The masses of W and Z bosons can be varied within a small range around their PDG values by changing the input values in resbos.in