hep: Add apfel++.

* guix-science/packages/hep.scm (apfel++): New variable.

1 files changed, 31 insertions, 0 deletions

diff --git a/guix-science/packages/hep.scm b/guix-science/packages/hep.scm
index 492d81c..f4ace30 100644
--- a/guix-science/packages/hep.scm
+++ b/guix-science/packages/hep.scm
@@ -76,6 +76,37 @@ evolution equations are solved in x-space by means of higher order
 interpolations and Runge-Kutta techniques.")
     (license license:gpl3)))
 
+(define-public apfel++
+  (package
+    (name "apfel++")
+    (version "4.10.0")
+    (source
+     (origin
+       (method git-fetch)
+       (uri (git-reference
+             (url "https://github.com/vbertone/apfelxx")
+             (commit version)))
+       (file-name (git-file-name name version))
+       (sha256
+        (base32 "0pz4rjam5l62fzvdpd9grm1vy4hq8mj9s7hrh1yr8hr8h2p9lqm6"))))
+    (build-system cmake-build-system)
+    (inputs (list lhapdf yaml-cpp))
+    (native-inputs (list gfortran pybind11 python))
+    (home-page "https://vbertone.github.io/apfelxx/html/index.html")
+    (synopsis "PDF evolution library in C++")
+    (description
+     "APFEL++ is a C++ rewriting of the Fortran 77 code APFEL originally
+conceived to evolve collinear parton distribution functions (PDFs).  However,
+APFEL++ is based on a completely new code design and guarantees a better
+performance along with a more optimal memory management.  The new modular
+structure allows for better maintainability and easier extensibility.  This
+makes APFEL++ suitable for a wide range of tasks: from the solution of the DGLAP
+evolution equations to the computation of deep-inelastic-scattering (DIS) and
+single-inclusive-annihilation cross sections. Also more complex computations,
+such as differential semi-inclusive DIS and Drell-Yan cross sections, are easily
+implementable in APFEL++.")
+    (license license:gpl3)))
+
 (define-public chaplin
   (package
     (name "chaplin")