text: //
  // APFEL++ 2017
  //
  // Author: Valerio Bertone: valerio.bertone@cern.ch
  //
  
  #pragma once
  
  namespace apfel
  {
    /**
     * @name Collins-Soper anomalous dimension.
     * Coefficients of the Collins-Soper anomalous dimension. The
     * expressions are taken from eq. (69)
     * https://arxiv.org/pdf/1705.07167.pdf and from eq (D.9) of
     * https://arxiv.org/pdf/1604.07869.pdf.
     */
    ///@{
    /// &alpha;<SUB>s</SUB> term
    double KCS00();
  
  /// &alpha;<SUB>s</SUB>L term
    double KCS01();
  
    /// &alpha;<SUB>s</SUB><SUP>2</SUP> term
    double KCS10(int const& nf);
  
    /// &alpha;<SUB>s</SUB><SUP>2</SUP>L term
    double KCS11(int const& nf);
  
    /// &alpha;<SUB>s</SUB><SUP>2</SUP>L<SUP>2</SUP> term
    double KCS12(int const& nf);
  
    /// &alpha;<SUB>s</SUB><SUP>3</SUP> term
    double KCS20(int const& nf);
  
    /// &alpha;<SUB>s</SUB><SUP>3</SUP>L term
    double KCS21(int const& nf);
  
    /// &alpha;<SUB>s</SUB><SUP>3</SUP>L<SUP>2</SUP> term
    double KCS22(int const& nf);
  
    /// &alpha;<SUB>s</SUB><SUP>3</SUP>L<SUP>3</SUP> term
    double KCS23(int const& nf);
    ///@}
  }
  