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0001 //
0002 // APFEL++ 2017
0003 //
0004 // Author: Valerio Bertone: valerio.bertone@cern.ch
0005 //
0006 
0007 #pragma once
0008 
0009 namespace apfel
0010 {
0011   /**
0012    * @name MSbar mass anomalous dimension
0013    * Coefficients of the \f$\gamma_m\f$ function.
0014    * Reference: https://arxiv.org/pdf/hep-ph/9910332
0015    */
0016   ///@{
0017   /**
0018    * @brief LO coefficient of the \f$\gamma_m\f$ function.
0019    * @return \f$\gamma_m^{[0]}\f$
0020    */
0021   double gammam0();
0022 
0023   /**
0024    * @brief NLO coefficient of the \f$\\gamma_m\f$ function.
0025    * @param nf: the number of active flavours
0026    * @return \f$\gamma_m^{[1]}(n_f)\f$
0027    */
0028   double gammam1(int const& nf);
0029 
0030   /**
0031    * @brief NNLO coefficient of the \f$\\gamma_m\f$ function.
0032    * @param nf: the number of active flavours
0033    * @return \f$\gamma_m^{[2]}(n_f)\f$
0034    */
0035   double gammam2(int const& nf);
0036   ///@}
0037 }