nCTEQ is hosted by Hepforge, IPPP Durham

nCTEQ15 results:

Code:

In order to use the grids in the older PDS format provided below, you can make use of a sample FORTRAN code:

nCTEQ-code.tar.gz

After unpacking the tarball "tar -xzvf nCTEQ-code.tar.gz", one obtains the following files:
Grids/               : directory containing PDF grid files
README.TXT           : short description file
Cteq6Pdf.f           : CTEQ6 proton evolution code
Cteq6Pdfab.f         : CTEQ6 proton evolution code when using 2 PDF at the same time
setNpdf2.f           : code to access the nuclear PDF grids
demo1.f              : demonstration program to show a simple use of provided functions
demo2.f              : demonstration program to show the use of the code with 2 PDFs calculating the nuclear correction ratio
doit                 : executable Linux scripts to compile demo1.f

Grids:

  • nCTEQ15 bound proton grids (PDS & LHAPDF)
  • nCTEQ15 nucleus grids (LHAPDF)
  • nCTEQ15-np bound proton grids for fit without pion data (PDS & LHAPDF)
  • nCTEQ15-np nucleus grids for fit without pion data (LHAPDF)
If you use any of the grids provided here, please cite

nCTEQ15 -- Global analysis of nuclear parton distributions with uncertainties in the CTEQ framework
K. Kovarik, A. Kusina, T. Jezo, D. Clark, C. Keppel, J. Morfin, F. Olness, J.F. Owens, I. Schienbein, J. Y. Yu
arXiv:1509.00792 [hep-ph].

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nCTEQ15 bound proton grids

PDF grids for parton inside a bound proton for a selection of nuclei. The PDF of the full nucleus can be
constructed from the the PDF for bound proton using the isospin symmetry or one can use the dedicated
grids for the full nucleus. All grids include additional information to construct PDF uncertainties. All grids for all nuclei and uncertainties (PDS, LHAPDF).

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nCTEQ15 nucleus grids

PDF grids for full nuclei which can directly be used to calculate cross-sections for the nuclear collisions.
The PDF for a full nucleus is composed of the PDF for proton/neutron bound in a nucleus as

All grids for all nuclei and uncertainties (LHAPDF).

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nCTEQ15-np bound proton grids

PDF grids for parton inside a bound proton for a selection of nuclei for a fit without pion data.
All grids include additional information to construct PDF uncertainties. All grids for all nuclei and uncertainties (PDS, LHAPDF).

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nCTEQ15-np nucleus grids

PDF grids for full nuclei for a fit without pion data. These PDFs can directly be used to calculate cross-sections for the nuclear collisions.
The PDF for a full nucleus is composed of the PDF for proton/neutron bound in a nucleus as

All grids for all nuclei and uncertainties (LHAPDF).

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for comments or requests contact K.Kovarik karol.kovarik@uni-muenster.de
                                 F.Olness  olness@physics.smu.edu