Requires the grid files
nDS_LO.GRID
nDS_NLO.GRID
nDSg_LO.GRID
nDSg_NLO.GRID
nDS.uu
is a tarred, gzipped and uuencoded version of the complete
package (1027 KB).
************************************************************************** * * NUCLEAR PARTON DISTRIBUTIONS (NLO and LO) * FROM hep-ph/0311227 Phys.Rev.D69:074028,2004 * D. de Florian and R. Sassot * * The distributions are obtained by calling the subroutine * * nDS(ISET,X,Q,A,RUV,RDV,RUB,RDB,RS,RG) * * INPUT: * iSET: 1 LO SET * 2 NLO SET (MSbar scheme) * 3 LO SET gluon shadowing * 4 NLO SET gluon shadowing (MSbar scheme) * X= x_bjorken * Q= factorization scale * A= atomic number * OUTPUT: the subroutine returns the NUCLEAR RATIOS * R_f(x,Q,A) = f_A(x,Q)/f_p(x,Q) * where f_A corresponds the pdf of a parton of flavour f in a proton of a * nucleus A, and f_p is the corresponding pdf in the free proton. * * RUV : U VALENCE DISTRIBUTION * RDV : D VALENCE DISTRIBUTION * RUB : UBAR DISTRIBUTION * RDB : DBAR DISTRIBUTION * RS : STR(=STRBAR) DISTRIBUTION * RG : GLUON DISTRIBUTION * Heavy flavor quarks are not considered in the analysis. The * "nuclear ratio" in the neutron can be obtained by isospin symmetry, * i.e. RUV_proton=RDV_neutron, etc * * COMMON: The main program or the calling routine has to have * a common block COMMON / INTINPDF / IINPDF , and the * integer variable IINPDF has always to be zero when * nDS is called for the first time or when ISET * has been changed. * * GRIDS: nDS_LO.GRID, nDS_NLO.GRID, nDSg_LO.GRID, nDSg_NLO.GRID * * RANGE OF VALIDITY OF THE INTERPOLATION: * 10^(-6)< X < 1.0 * 1 < Q**2 < 10^6 * 4 < A < 208 * * IN CASE OF PROBLEMS, DOUBTS, ETC, PLEASE REPORT TO * deflo@df.uba.ar * sassot@df.uba.ar * **************************************************************************