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diff --git a/MatrixElement/EW/EWCouplings.h b/MatrixElement/EW/EWCouplings.h
--- a/MatrixElement/EW/EWCouplings.h
+++ b/MatrixElement/EW/EWCouplings.h
@@ -1,449 +1,449 @@
// -*- C++ -*-
#ifndef Herwig_EWCouplings_H
#define Herwig_EWCouplings_H
//
// This is the declaration of the EWCouplings class.
//
#include "ThePEG/Interface/Interfaced.h"
#include <boost/numeric/ublas/vector.hpp>
#include <boost/numeric/ublas/matrix.hpp>
#include "EWCouplings.fh"
namespace Herwig {
using namespace ThePEG;
/**
* Here is the documentation of the EWCouplings class.
*
* @see \ref EWCouplingsInterfaces "The interfaces"
* defined for EWCouplings.
*/
class EWCouplings: public Interfaced {
public:
/** @name Standard constructors and destructors. */
//@{
/**
* The default constructor.
*/
EWCouplings(unsigned int loops=2, unsigned int steps=200,
- Energy highScale=10.*TeV, Energy lowScale=10.*GeV);
+ Energy highScale=14.*TeV, Energy lowScale=10.*GeV);
/**
* The destructor.
*/
virtual ~EWCouplings();
//@}
/**
* Initialize the running couplings
*/
void initialize();
/**
* Number of dynamical quarks at $\log\mu = x$ (in GeV)
* N.B.Integrate out top quark at Mz, not at Mt.
*/
unsigned int numberOfFlavours(double x) {
return x >= std::log(ewScale_/GeV) ? 6 : 5;
}
public:
/**
* Set whether or not to include \f$SU(3)\f$ running
*/
void SU3(bool includeSU3) {includeSU3_ = includeSU3;}
/**
* Whether or not to include \f$SU(3)\f$ running
*/
bool SU3() { return includeSU3_;}
/**
* Set whether or not to include EW running
*/
void EW(bool includeEW) {includeEW_ = includeEW;}
/**
* Whether or not to include EW running
*/
bool EW() { return includeEW_;}
/**
* alpha for the U1 gauge coupling at energy mu (in GeV):
*/
double a1(Energy mu) {
if (includeEW_) {
if (mu>=ewScale_) {
return (3.0/5.0)*interpolate(log(mu/GeV),1);
}
return interpolateLow(log(mu/GeV),1);
}
else
return 0.0;
}
/**
* alpha for the SU2 gauge coupling at energy mu (in GeV):
*/
double a2(Energy mu) {
if (includeEW_) {
if (mu<ewScale_) {
return 0.0;
}
else
return interpolate(log(mu/GeV),2);
}
else
return 0.0;
}
/**
* alpha for the SU3 gauge coupling at energy mu (in GeV):
*/
double a3(Energy mu) {
if(includeSU3_) {
if (mu>=ewScale_) {
return interpolate(log(mu/GeV),3);
}
else {
return interpolateLow(log(mu/GeV),2);
}
}
else
return 0.0;
}
/**
* alpha for EM
*/
double aEM(Energy mu) {
if (includeEW_) {
if (mu<=ewScale_) {
return interpolateLow(log(mu/GeV),1);
}
else {
double alpha1=a1(mu);
double alpha2=a2(mu);
return alpha1*alpha2/(alpha1+alpha2);
}
}
return 0.0;
}
double aS(Energy mu) {
if(includeSU3_) {
if (mu<=ewScale_) {
return interpolateLow(log(mu/GeV),2);
}
else {
return interpolate(log(mu/GeV),3);
}
}
else return 0.0;
}
/**
* Top quark Yukawa coupling
*/
double y_t(Energy mu) {
if (includeEW_) {
if(mu<ewScale_)
return 0.0;
else
return interpolate(log(mu/GeV),4);
}
else
return 0.0;
}
/**
* Quartic scalar coupling lambda (normalization different, hence factor of 2):
*/
double lambda(Energy mu) {return 2.0*interpolate(log(mu/GeV),5);}
/**
* VEV
*/
Energy vev(Energy mu) {return interpolate(log(mu/GeV),6)*GeV;}
/**
* \f$\lambda_t\f$
*/
double lambda_t(Energy mu) {return y_t(mu);}
/**
* Z couplings
*/
//@{
double g_Lu(Energy mu) {return 0.5-(2.0/3.0)*Sin2thW(mu);}
double g_Ld(Energy mu) {return -0.5+(1.0/3.0)*Sin2thW(mu);}
double g_Le(Energy mu) {return (-1.0/2.0)+Sin2thW(mu);}
double g_Lnu(Energy ) {return (0.5);}
double g_Ru(Energy mu) {return (-2.0/3.0)*Sin2thW(mu);}
double g_Rd(Energy mu) {return (1.0/3.0)*Sin2thW(mu);}
double g_Re(Energy mu) {return Sin2thW(mu);}
double g_W(Energy mu) {return Cos2thW(mu);}
double g_phiPlus(Energy mu) {return 0.5-Sin2thW(mu);}
//@}
/**
* \f\cos^2\theta_W\f$
*/
double Cos2thW(Energy ) {
//\todo why this value?
//return mW()*mW()/(mZ()*mZ());
return (1.-0.2314);
}
/**
* \f\sin^2\theta_W\f$
*/
double Sin2thW(Energy mu) {return 1.-Cos2thW(mu);}
double aW(Energy mu) {return a2(mu);}
double aZ(Energy mu) {
//return a2(mu)/Cos2thW(mu); // Same thing, actually
return a1(mu)+a2(mu);
}
public:
/**
* Masses of the Standard Model particles
*/
//@{
/**
* Z mass
*/
Energy mZ() const { return mZ_;}
/**
* W Mass
*/
Energy mW() const { return mW_;}
/**
* Top quark mass
*/
Energy mT() const {return mT_;}
Energy mTatmZ() { return mT_;}
/**
* Higg boson mass
*/
Energy mH() const {return mH_;}
//@}
public:
/** @name Functions used by the persistent I/O system. */
//@{
/**
* Function used to write out object persistently.
* @param os the persistent output stream written to.
*/
void persistentOutput(PersistentOStream & os) const;
/**
* Function used to read in object persistently.
* @param is the persistent input stream read from.
* @param version the version number of the object when written.
*/
void persistentInput(PersistentIStream & is, int version);
//@}
/**
* The standard Init function used to initialize the interfaces.
* Called exactly once for each class by the class description system
* before the main function starts or
* when this class is dynamically loaded.
*/
static void Init();
protected:
/** @name Clone Methods. */
//@{
/**
* Make a simple clone of this object.
* @return a pointer to the new object.
*/
virtual IBPtr clone() const;
/** Make a clone of this object, possibly modifying the cloned object
* to make it sane.
* @return a pointer to the new object.
*/
virtual IBPtr fullclone() const;
//@}
private:
/**
* Set the initial value of the couplings
*/
void initializeCouplings(vector<Complex> & y);
/**
* Assigns numerical values to beta functions
* Takes in a point x = log(mu) and the values of y[i] at x and assigns dydx[i] the
* value beta[i](mu). The function Derivs farms out the plugging in to the three
* functions BetaGauge, BetaYukawa, and BetaHiggs, which evaluates the beta functions
* for the gauge couplings, yukawa matrices, and higgs quartic coupling/vev, respectively.
*/
void derivatives(const double x, vector< Complex > &y,
vector< Complex > & dydx);
/**
* Beta function for the gauge interactions
*/
void betaGauge(const double x, vector<Complex> &y, vector<Complex> &dydx);
/**
* Beta function for the gauge interactions at low scales
*/
void lowBetaGauge(const double x, vector<Complex> &y, vector<Complex> &dydx);
/**
* Beta function for the Yukawa interactions
*/
void betaYukawa(const double x, vector<Complex> &y, vector<Complex> &dydx);
/**
* Beta function for the Higgs interactions
*/
void betaHiggs(const double x, vector<Complex> &y, vector<Complex> &dydx);
/**
* Update the couplings using 4-th order RK
* Takes in a vector y[i] of function values at a point x and the values of the
* first derivatives dydx[i] ( = dy[i]/dx ) alon with a step size stepsize. The
* function then defines assigns the value of y[i](x+stepsize) to the variable yout[i].
* (Adapted from sample code in Numerical Recipes in C++ Press, Teukolsky, et. al.)
*/
void RK4(vector<Complex> & y, vector<Complex> &dydx, const double x,
const double stepsize, vector<Complex> &yout);
/**
* Initialize the low energy parameters
*/
void initializeLow();
/**
* Interpolate the table, t = ln(mu)
*/
double interpolate(double t, int paramIndex);
/**
* Interpolate the tabel, t = ln(mu)
*/
double interpolateLow(double t, int paramIndex);
private:
/**
* The assignment operator is private and must never be called.
* In fact, it should not even be implemented.
*/
EWCouplings & operator=(const EWCouplings &);
private:
/**
* Electoweak Scale
*/
Energy ewScale_;
/**
* High Scale
*/
Energy highScale_;
/**
* Low Scale
*/
Energy lowScale_;
/**
* Whether or not to include SU3
*/
bool includeSU3_;
/**
* Whether or not to include EW
*/
bool includeEW_;
/**
* Whether or not the running couplings have been initialized
*/
bool initialized_;
/**
* Masses of Standard Model particles
*/
//@{
/**
* Mass Choice
*/
bool massChoice_;
/**
* Z mass
*/
Energy mZ_;
/**
* W mass
*/
Energy mW_;
/**
* Top mass
*/
Energy mT_;
/**
* Higgs boson mass
*/
Energy mH_;
//@}
/**
* Number of loops
*/
unsigned int loops_;
/**
* Number of steps for Runga-Kutta (High scale)
*/
unsigned int highSteps_;
/**
* Number of steps for Runga-Kutta (Low scale)
*/
unsigned int lowSteps_;
/**
* Matrix to store the parameters
*/
boost::numeric::ublas::matrix<double> table_;
/**
* Matrix to store the low energy parameters.
* This will hold only aEM and a3 at mu<ewScale
*/
boost::numeric::ublas::matrix<double> lowTable_;
};
}
#endif /* Herwig_EWCouplings_H */

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