From acf9e66c5f13517914a62cbe04f147b54f478d3d Mon Sep 17 00:00:00 2001
From: Ghislain Vaillant <ghislain.vaillant@inria.fr>
Date: Mon, 24 Aug 2026 12:17:56 +0200
Subject: hep: Add recola1.

* guix-science/packages/hep.scm (recola1): New variable.
---
 guix-science/packages/hep.scm | 34 ++++++++++++++++++++++++++++++++++
 1 file changed, 34 insertions(+)

diff --git a/guix-science/packages/hep.scm b/guix-science/packages/hep.scm
index c52857b..3140aff 100644
--- a/guix-science/packages/hep.scm
+++ b/guix-science/packages/hep.scm
@@ -1129,6 +1129,40 @@ discrete grid in x and Q2.  You can evolve unpolarised parton density
 functions in NNLO, and polarised PDFs or fragmentation functions in NLO.")
     (license license:gpl3+)))
 
+(define-public recola1
+  (package
+    (name "recola1")
+    (version "1.5.1")
+    (source
+     (origin
+       (method git-fetch)
+       (uri (git-reference
+             (url "https://gitlab.com/recola/recola1.git")
+             (commit version)))
+       (file-name (git-file-name name version))
+       (sha256
+        (base32 "1wvc6qrklkw2d5j9q087c26kjscdhq0ff0fqdzp6pyhrskp8rmqy"))))
+    (build-system cmake-build-system)
+    (arguments
+     (list
+      #:configure-flags
+      #~(list (string-append "-Dcollier_DIR:PATH="
+                             #$(this-package-input "collier") "/lib/cmake"))
+      #:phases
+      #~(modify-phases %standard-phases
+          (replace 'check
+            (lambda* (#:key tests? #:allow-other-keys)
+              (invoke "make" "check"))))))
+    (inputs (list collier))
+    (native-inputs (list gfortran))
+    (home-page "https://recola.gitlab.io/")
+    (synopsis "Recursive Computation of 1-Loop Amplitudes (version 1)")
+    (description
+     "Recola is a Fortran95 computer program for the automated generation and
+numerical computation of EW and QCD amplitudes in the Standard Model at
+next-to-leading order.")
+    (license license:gpl3)))
+
 (define-public sherpa
   (package
     (name "sherpa")
-- 
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