RSymSQCD

A C++ code for calculation of NLO (S)QCD corrections in (not only) the Minimal R-symmetric Supersymmetric Standard Model (MRSSM).

This code was developed as part of the ongoing research into an R-symmetric SUSY. If you use it, please cite:

• P. Dießner, W. Kotlarski, S. Liebschner and D. Stöckinger, Squark production in R-symmetric SUSY with Dirac gluinos: NLO corrections, J. High Energ. Phys. (2017) 2017: 142 (inspirehep)
• C. Borschensky, F. Frisenna, W. Kotlarski, A. Kulesza and D. Stöckinger, Squark production with R-symmetry beyond NLO at the LHC, (inspirehep)

Getting started

Prerequisites

• boost
• cmake
• Cuba
• LoopTools
• LHAPDF
• rk
• Threading Building Blocks

Some of those dependencies are usually avaliable in the repository of your linux distribution. On Ubuntu, they can be installed as

sudo apt install -y nlohmann-json3-dev libspdlog-dev libboost-program-options-dev libtbb-dev

LoopTools has to be compiled in position independent mode

FFLAGS="-O3 -fPIC" ./configure

Bulding RSymSQCD

To compile RSymSQCD you need a C++17 compiler (icpc, g++ >= 7.1 or clang >= 5.0).

Location of LoopTools, Cuba, rk and LHAPDF can be passed to cmake via LT_PREFIX, CUBA_PREFIX, RK_PREFIX and LHAPDF6_ROOT_DIR variables

Example:

cmake -Bbuild -DCUBA_PREFIX=YOUR_CUBA_LOCATION/Cuba-4.2.2 -DLT_PREFIX=YOUR_LT_LOCATION/LoopTools-2.16 -DRK_PREFIX=YOUR_LT_LOCATION/rk-1.8 -DLHAPDF6_ROOT_DIR=YOUR_LHAPDF_LOCATION/LHAPDF
cmake --build build

There is one project specific CMake variable: OPTIMIZE_FOR_NATIVE which enables (default is OFF) CPU specific optimizations (-march=native on GCC or Clang and -xHost on Intel). Use it if you plan to run the code on the same (or reasonably similar) machine as the one you are compiling it on.

Models

• MRSSM
• MSSM
• SM + colour octet scalar

Authors

Wojciech Kotlarski and Sebastian Liebschner

Licence

This code is distributed under the terms of GPL3 licence.

Acknowledgments

The code includes the $Li_2$ function from polylogarithm package by Alexander Voigt.