width.hpp

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#pragma once

#include "parameters.hpp"

namespace QQbar_threshold{


  double top_width(
      double mu, double m, order o,
      options opt = top_options()
  );


  double ttbar_width(
      int n, double mu, top_properties M, order o,
      options opt = top_options()
  );

  namespace detail{
    // NLO width correction to be used for subtractions in non-resonant xsection
    double x_1(double x);

    // quarkonium lifetime correction to be used in pole resummation
    double delta_Gamma_NNLO(int n, parameters const & p);

    double ttbar_width(int n, parameters const & p);
  }

}