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File indexing completed on 2026-06-02 08:17:12
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 QED beta function 0013 * Coefficients of the QED \f$\beta_{QED}\f$ function. 0014 */ 0015 ///@{ 0016 /** 0017 * @brief LO coefficient of the QED \f$\beta\f$ function. 0018 * @param nf: the number of active quark flavours 0019 * @param nl: the number of active charged leptons 0020 * @return \f$\beta_0(n_f, n_l)\f$ 0021 */ 0022 double beta0qed(int const& nf, int const& nl); 0023 0024 /** 0025 * @brief NLO coefficient of the QED \f$\beta\f$ function. 0026 * @param nf: the number of active flavours 0027 * @param nl: the number of active charged leptons 0028 * @return \f$\beta_1(n_f, n_l)\f$ 0029 */ 0030 double beta1qed(int const& nf, int const& nl); 0031 ///@} 0032 }
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