Asymmetry
Analysis
Collaboration
Asymmetry Analysis Collaboration (AAC) is a working group
on polarized parton distribution functions (polarizedPDF) formed
by theorists and experimentalists.
The purpose of the working group is to study current constraints
on the polarizedPDF and suggest future measurements
for better determination of these distributions.
FORTRAN library of Polarized PDF

AAC08 FORTRAN library source
(arXiv:0802.0808.0413 [hepph])

AAC08e.zip:
compressed FORTRAN library package (1.555 KB)
This compressed file contains 7 files
(aac08.f, sample.f, aacnlo08_posi.grd, aacnlo08_node.grd, grad_posi.grd, grad_node.grd, and EM.inc).
This subroutine returns the values of the AAC08 polarized PDFs and their gradient terms
at specified Q^{2} and x point.
Available range:
10^{9} <= X <= 1.0, and
1.0 GeV^{2} <= Q^{2} <= 10^{8} GeV^{2}.
Two PDF sets can be chosen in the setB analysis:
 polarized PDFs with a positivetype gluon distribution,
 polarized PDFs with a nodetype gluon distribution.
* For calculating uncertainties of the polarized PDFs by the Hessian method,
the inverse matrix of Hessian (error matrix) can be used by declaring
a common block: COMMON/ERRM/EM(11,11).

AAC03 FORTRAN library source
( Phys.Rev. D69, 054021 (2004) )

aac03e.tar.gz:
compressed FORTRAN library package (324 KB)
This compressed file contains 4 files (aac03e.f, sample.f, aacnlo.grd, and gradn.grd).

aac03e.f:
FORTRAN subroutine source file. Update version for uncertainty studies.
This subroutine returns the values of the AAC03 polarized PDFs and their gradient terms
at specified Q^{2} and x point.
Available range:
10^{9} <= X <= 1.0, and
1.0 GeV^{2} <= Q^{2} <= 10^{8} GeV^{2}.
* For calculating uncertainties of the polarized PDFs by the Hessian method,
the inverse matrix of Hessian (error matrix) can be used by declaring
a common block: COMMON/ERRM/EM(11,11).

aacnlo.grd: grid data table file for NLO set

gradn.grd: grid data table file for gradient terms of the AAC03 polarized PDFs

aac03.tar.gz:
compressed FORTRAN library package, previous version (102 KB)

AAC00 FORTRAN library source
(
Phys.Rev. D62 034017 (2000) )

aac00.tar.gz: compressed FORTRAN library package (148 KB)
This compressed file contains 5 files
(aac00.f, sample.f, aaclo.grd, aacnlo1.grd, and aacnlo2.grd).

aac00.f: FORTRAN subroutine source file
This subroutine returns the values of the AAC00 polarized PDF
and the structure function g_{1}
at specified Q^{2} and x point.
Available range:
10^{9} <= X <= 1.0, and
1.0 GeV^{2} <= Q^{2} <= 10^{6} GeV^{2}.
* The subroutine is separated grid data form the previous library subroutine
aac.f,
since the previous subroutine takes much times to compile.

aaclo.grd: grid data table file for LO set

aacnlo1.grd: grid data table file for NLO1 set

aacnlo2.grd: grid data table file for NLO2 set
Publications
_{Last Updated at Aug 05, 2008}
<
M. Hirai>