file src/spectrum.cpp
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Detailed Description
Author:
- Ben Farmer (benjamin.farmer@fysik.su.se)
- Pat Scott (p.scott@imperial.ac.uk)
- Abram Krislock (a.m.b.krislock@fys.uio.no)
Date:
- 2015 Mar
- 2015 May, 2016 Nov
- 2016 Feb
This class is used to deliver both information defined in the Standard Model (or potentially just QED X QCD) as a low-energy effective theory (as opposed to correspending information defined in a high-energy model) as well as a corresponding high energy theory. Parameters defined in the low-energy model are often used as input to a physics calculators. In addition, parameters used to define the Standard Model, in SLHA2 format, are provided in the SMINPUTS data member.
Access to the pole masses of either SubSpectrum is provided by the “get_Pole_Mass” function, which will search both subspectra for a match. For running parameters, one should access them via the getters of “LE” or “HE” subspectra.
Authors:
Source code
// GAMBIT: Global and Modular BSM Inference Tool
// *********************************************
/// \file
///
/// This class is used to deliver both information defined in the Standard
/// Model (or potentially just QED X QCD) as a low-energy effective theory (as
/// opposed to correspending information defined in a high-energy model) as well as a
/// corresponding high energy theory. Parameters defined in the low-energy model are
/// often used as input to a physics calculators. In addition, parameters used
/// to define the Standard Model, in SLHA2 format, are provided in the
/// SMINPUTS data member.
///
/// Access to the pole masses of either SubSpectrum is provided by the
/// "get_Pole_Mass" function, which will search both subspectra for a match.
/// For running parameters, one should access them via the getters of "LE" or
/// "HE" subspectra.
///
/// *********************************************
///
/// Authors:
/// <!-- add name and date if you modify -->
///
/// \author Ben Farmer
/// (benjamin.farmer@fysik.su.se)
/// \date 2015 Mar
///
/// \author Pat Scott
/// (p.scott@imperial.ac.uk)
/// \date 2015 May, 2016 Nov
///
/// \author Abram Krislock
/// (a.m.b.krislock@fys.uio.no)
/// \date 2016 Feb
///
/// *********************************************
#include "gambit/Elements/spectrum.hpp"
#include "gambit/Models/SimpleSpectra/SMSimpleSpec.hpp" // For auto-creation of simple SM low-energy SubSpectrum
#include "gambit/Utils/standalone_error_handlers.hpp"
#include "gambit/Utils/file_lock.hpp"
//#define SPECTRUM_DEBUG
namespace Gambit
{
/// @{ Spectrum class member function definitions
/// Check if object has been fully initialised
void Spectrum::check_init() const
{
if(not initialised) utils_error().raise(LOCAL_INFO,"Access or deepcopy of empty Spectrum object attempted!");
}
/// Swap resources of two Spectrum objects
/// Note: Not a member function! This is an external function which is a friend of the Spectrum class.
void swap(Spectrum& first, Spectrum& second)
{
using std::swap; // enable ADL
swap(first.LE, second.LE);
swap(first.HE, second.HE);
swap(first.LE_new, second.LE_new);
swap(first.HE_new, second.HE_new);
swap(first.SMINPUTS, second.SMINPUTS);
swap(first.input_Param, second.input_Param);
swap(first.mass_cuts, second.mass_cuts);
swap(first.mass_ratio_cuts, second.mass_ratio_cuts);
swap(first.initialised, second.initialised);
}
/// @{ Constructors/destructors
/// Default constructor
Spectrum::Spectrum() : input_Param(NULL), mass_cuts(NULL), mass_ratio_cuts(NULL), initialised(false) {}
/// Construct new object, cloning the SubSpectrum objects supplied and taking possession of them.
Spectrum::Spectrum(const SubSpectrum& le, const SubSpectrum& he, const SMInputs& smi, const std::map<str, safe_ptr<const double> >* pars,
const mc_info& mci, const mr_info& mri)
: LE_new(le.clone())
, HE_new(he.clone())
, LE(LE_new.get())
, HE(HE_new.get())
, SMINPUTS(smi)
, input_Param(pars)
, mass_cuts(&mci)
, mass_ratio_cuts(&mri)
, initialised(true)
{ check_mass_cuts(); }
/// Construct new object, automatically creating an SMSimpleSpec as the LE subspectrum, and cloning the HE SubSpectrum object supplied and taking possession of it.
Spectrum::Spectrum(const SubSpectrum& he, const SMInputs& smi, const std::map<str, safe_ptr<const double> >* pars, const mc_info& mci, const mr_info& mri)
: LE_new(SMSimpleSpec(smi).clone())
, HE_new(he.clone())
, LE(LE_new.get())
, HE(HE_new.get())
, SMINPUTS(smi)
, input_Param(pars)
, mass_cuts(&mci)
, mass_ratio_cuts(&mri)
, initialised(true)
{ check_mass_cuts(); }
/// Construct new object, wrapping existing SubSpectrum objects
/// Make sure the original objects don't get deleted before this wrapper does!
Spectrum::Spectrum(SubSpectrum* const le, SubSpectrum* const he, const SMInputs& smi, const std::map<str, safe_ptr<const double> >* pars,
const mc_info& mci, const mr_info& mri)
: LE(le)
, HE(he)
, SMINPUTS(smi)
, input_Param(pars)
, mass_cuts(&mci)
, mass_ratio_cuts(&mri)
, initialised(true)
{ check_mass_cuts(); }
/// Copy constructor, clones SubSpectrum objects.
/// Make a non-const copy in order to use e.g. RunBothToScale function.
Spectrum::Spectrum(const Spectrum& other)
: LE_new(other.clone_LE())
, HE_new(other.clone_HE())
, LE(LE_new.get())
, HE(HE_new.get())
, SMINPUTS(other.SMINPUTS)
, input_Param(other.input_Param)
, mass_cuts(other.mass_cuts)
, mass_ratio_cuts(other.mass_ratio_cuts)
, initialised(other.initialised)
{}
/// Copy-assignment
/// Using "copy-and-swap" idiom
Spectrum& Spectrum::operator=(const Spectrum& other)
{
Spectrum temp(other);
swap(*this, temp);
return *this;
}
/// Move constructor
Spectrum::Spectrum(Spectrum&& other)
{
swap(*this, other);
}
/// @}
/// Overloads for PDG types
/// These just convert the types and then call the properly defined functions
//DEFINE_PDG_GETTERS(Spectrum,Pole_Mass) //TODO: redo
/// Linked running
/// Only possible with non-const object
void Spectrum::RunBothToScale(double scale)
{
LE->RunToScale(scale);
HE->RunToScale(scale);
}
/// Helper function for checking if a particle or ratio has been requested as an absolute value
bool is_abs(str& s)
{
if (s.at(0) != '|' or *s.rbegin() != '|') return false;
s = s.substr(1, s.size()-2);
return true;
}
/// Check the that the spectrum satisifies any mass cuts requested from the yaml file.
void Spectrum::check_mass_cuts()
{
if (mass_cuts != NULL and not mass_cuts->empty())
{
for (auto it = mass_cuts->begin(); it != mass_cuts->end(); ++it)
{
str p = it->first;
bool absolute_value = is_abs(p);
const double& low = it->second.first;
const double& high = it->second.second;
#ifdef SPECTRUM_DEBUG
cout << "Applying mass cut " << low << " GeV < " << (absolute_value ? "|mass("+p+")|" : "mass("+p+")") << " < " << high << " GeV" << endl;
#endif
if (not has(Par::Pole_Mass, p)) utils_error().raise(LOCAL_INFO, "Cannot cut on mass of unrecognised particle: " + p);
double m = get(Par::Pole_Mass, p);
if (absolute_value) m = std::abs(m);
#ifdef SPECTRUM_DEBUG
cout << "Actual value: " << m << endl;
#endif
if (m < low or m > high) invalid_point().raise(p + " failed requested mass cut.");
}
}
if (mass_ratio_cuts != NULL and not mass_ratio_cuts->empty())
{
for (auto it = mass_ratio_cuts->begin(); it != mass_ratio_cuts->end(); ++it)
{
str p1 = it->first.first;
str p2 = it->first.second;
bool absolute_value1 = is_abs(p1);
bool absolute_value2 = is_abs(p2);
const double& low = it->second.first;
const double& high = it->second.second;
#ifdef SPECTRUM_DEBUG
cout << "Applying mass ratio cut " << low << " < "
<< (absolute_value1 ? "|mass("+p1+")|" : "mass("+p1+")") << " / "
<< (absolute_value2 ? "|mass("+p2+")|" : "mass("+p2+")")
<< " < " << high << endl;
#endif
if (not has(Par::Pole_Mass, p1)) utils_error().raise(LOCAL_INFO, "Cannot cut on ratio with mass of unrecognised particle: " + p1);
if (not has(Par::Pole_Mass, p2)) utils_error().raise(LOCAL_INFO, "Cannot cut on ratio with mass of unrecognised particle: " + p2);
double m1 = get(Par::Pole_Mass, p1);
double m2 = get(Par::Pole_Mass, p2);
if (absolute_value1) m1 = std::abs(m1);
if (absolute_value2) m2 = std::abs(m2);
double mratio = m1/m2;
#ifdef SPECTRUM_DEBUG
cout << "Actual value: " << mratio << endl;
#endif
if (mratio < low or mratio > high) invalid_point().raise(p1 + "/" + p2 +" failed requested mass ratio cut.");
}
}
}
/// Standard getters
/// Return references to internal data members. Make sure original Spectrum object doesn't
/// get destroyed before you finish using these or you will cause a segfault.
SubSpectrum& Spectrum::get_LE() {check_init(); return *LE;}
SubSpectrum& Spectrum::get_HE() {check_init(); return *HE;}
SMInputs& Spectrum::get_SMInputs() {check_init(); return SMINPUTS;}
// const versions
const SubSpectrum& Spectrum::get_LE() const {check_init(); return *LE;}
const SubSpectrum& Spectrum::get_HE() const {check_init(); return *HE;}
const SMInputs& Spectrum::get_SMInputs() const {check_init(); return SMINPUTS;}
/// Clone getters
/// Note: If you want to clone the whole Spectrum object, just use copy constructor, not these.
std::unique_ptr<SubSpectrum> Spectrum::clone_LE() const {check_init(); return LE->clone();}
std::unique_ptr<SubSpectrum> Spectrum::clone_HE() const {check_init(); return HE->clone();}
/// Pole mass getters/checkers
/// "Shortcut" getters/checkers to access pole masses in hosted SubSpectrum objects.
/// HE object given higher priority; if no match found, LE object will be
/// checked. If still no match, error is thrown.
/// TODO: These currently work for anything! Need to restrict them to only allow
/// access to pole masses and their estimated uncertainties
/// Also need to change error messages etc, plus the PDG overloads
bool Spectrum::has(const Par::Tags partype, const std::string& mass) const
{
return (HE->has(partype,mass) or LE->has(partype,mass));
}
double Spectrum::get(const Par::Tags partype, const std::string& mass) const
{
double result(-1);
if( HE->has(partype,mass) )
{ result = HE->get(partype,mass); }
else if( LE->has(partype,mass) )
{ result = LE->get(partype,mass); }
else
{
std::ostringstream errmsg;
errmsg << "Error retrieving particle spectrum data!" << std::endl;
errmsg << "No pole mass with string reference '"<<mass<<"' could be found in either LE or HE SubSpectrum!" <<std::endl;
utils_error().raise(LOCAL_INFO,errmsg.str());
}
// In c++11 we could add the [[noreturn]] attribute utils_error.raise()
// to suppress the compiler warning about not returning anything (and enable
// extra optimisations), however it isn't implemented in gcc until version
// 4.8 (and we decided to support earlier versions).
return result;
}
bool Spectrum::has(const Par::Tags partype, const std::string& mass, const int index) const
{
return (HE->has(partype,mass,index) or LE->has(partype,mass,index));
}
double Spectrum::get(const Par::Tags partype, const std::string& mass, const int index) const
{
double result(-1);
if( HE->has(partype,mass,index) )
{ result = HE->get(partype,mass,index); }
else if( LE->has(partype,mass,index) )
{ result = LE->get(partype,mass,index); }
else
{
std::ostringstream errmsg;
errmsg << "Error retrieving particle spectrum data!" << std::endl;
errmsg << "No pole mass with string reference '"<<mass<<"' and index '"<<index<<"' could be found in either LE or HE SubSpectrum!" <<std::endl;
utils_error().raise(LOCAL_INFO,errmsg.str());
}
// [[noreturn]]
return result;
}
bool Spectrum::has(const Par::Tags partype, const std::string& mass, const int index1, const int index2) const
{
return (HE->has(partype,mass,index1,index2) or LE->has(partype,mass,index1,index2));
}
double Spectrum::get(const Par::Tags partype, const std::string& mass, const int index1, const int index2) const
{
double result(-1);
if( HE->has(partype,mass,index1,index2) )
{ result = HE->get(partype,mass,index1,index2); }
else if( LE->has(partype,mass,index1,index2) )
{ result = LE->get(partype,mass,index1,index2); }
else
{
std::ostringstream errmsg;
errmsg << "Error retrieving particle spectrum data!" << std::endl;
errmsg << "No pole mixing with string reference '"<<mass<<"' and indices '"<<index1<<"','"<<index2<<"' could be found in either LE or HE SubSepctrum!" << std::endl;
utils_error().raise(LOCAL_INFO,errmsg.str());
}
// [[noreturn]]
return result;
}
/// @{ PDB getter/checker overloads
/* Input PDG code plus context integer as separate arguments */
bool Spectrum::has(const Par::Tags partype,
const int pdg_code, const int context) const
{
return has( partype, std::make_pair(pdg_code,context) );
}
/* Input PDG code plus context integer as separate arguments */
double Spectrum::get(const Par::Tags partype,
const int pdg_code, const int context) const
{
return get( partype, std::make_pair(pdg_code,context) );
}
/* Input PDG code plus context integer as pair */
bool Spectrum::has(const Par::Tags partype,
const std::pair<int,int> pdgpr) const
{
/* If there is a short name, then retrieve that plus the index */
if( Models::ParticleDB().has_short_name(pdgpr) )
{
return has( partype, Models::ParticleDB().short_name_pair(pdgpr) );
}
else /* Use the long name with no index instead */
{
return has( partype, Models::ParticleDB().long_name(pdgpr) );
}
}
/* Input PDG code plus context integer as pair */
double Spectrum::get(const Par::Tags partype,
const std::pair<int,int> pdgpr) const
{
/* If there is a short name, then retrieve that plus the index */
if( Models::ParticleDB().has_short_name(pdgpr) )
{
return get( partype, Models::ParticleDB().short_name_pair(pdgpr) );
}
else /* Use the long name with no index instead */
{
return get( partype, Models::ParticleDB().long_name(pdgpr) );
}
}
/* Input short name plus index as pair */
bool Spectrum::has(const Par::Tags partype,
const std::pair<str,int> shortpr) const
{
return has( partype, shortpr.first, shortpr.second);
}
/* Input short name plus index as pair */
double Spectrum::get(const Par::Tags partype,
const std::pair<str,int> shortpr) const
{
return get( partype, shortpr.first, shortpr.second);
}
/// @}
/// @{ Getters which first check the sanity of the thing they are returning
double Spectrum::safeget(const Par::Tags partype,
const std::string& mass) const
{
double result = get(partype, mass);
if (Utils::isnan(result))
utils_error().raise(LOCAL_INFO,"SubSpectrum parameter is nan!!");
return result;
}
double Spectrum::safeget(const Par::Tags partype,
const std::string& mass, const int index) const
{
double result = get(partype, mass, index);
if (Utils::isnan(result))
utils_error().raise(LOCAL_INFO,"SubSpectrum parameter is nan!!");
return result;
}
double Spectrum::safeget(const Par::Tags partype,
const int pdg_code, const int context) const
{
double result = get(partype, pdg_code, context);
if (Utils::isnan(result))
utils_error().raise(LOCAL_INFO,"SubSpectrum parameter is nan!!");
return result;
}
double Spectrum::safeget(const Par::Tags partype,
const std::pair<int,int> pdgpr) const
{
double result = get(partype, pdgpr);
if (Utils::isnan(result))
utils_error().raise(LOCAL_INFO,"SubSpectrum parameter is nan!!");
return result;
}
double Spectrum::safeget(const Par::Tags partype,
const std::pair<str,int> shortpr) const
{
double result = get(partype, shortpr);
if (Utils::isnan(result))
utils_error().raise(LOCAL_INFO,"SubSpectrum parameter is nan!!");
return result;
}
/// @}
/// SLHAea object getter
/// First constructs an SLHAea object from the SMINPUTS object, then adds the info from
/// the LE subspectrum (if possible), followed by the HE subspectrum (if possible). Any duplicate
/// entries are overwritten at each step, so HE takes precendence over LE, and LE takes precedence
/// over SMINPUTS.
SLHAstruct Spectrum::getSLHAea(int slha_version) const
{
SLHAstruct slha(SMINPUTS.getSLHAea());
LE->add_to_SLHAea(slha_version, slha);
HE->add_to_SLHAea(slha_version, slha);
return slha;
}
/// Output spectrum contents as an SLHA file, using getSLHAea.
void Spectrum::writeSLHAfile(int slha_version, const str& filename) const
{
Utils::FileLock mylock(filename);
mylock.get_lock();
std::ofstream ofs(filename);
ofs << getSLHAea(slha_version);
ofs.close();
mylock.release_lock();
}
/// Helper function to drop SLHA files
void Spectrum::drop_SLHAs_if_requested(const safe_ptr<Options>& runOptions, const str& default_name)
{
if (runOptions->getValueOrDef<bool>(false, "drop_SLHA_file"))
{
// Spit out the full spectrum as SLHA1 and SLHA2 files.
str prefix = runOptions->getValueOrDef<str>("", "SLHA_output_prefix");
str filename = runOptions->getValueOrDef<str>(default_name, "SLHA_output_filename");
writeSLHAfile(1,prefix+filename+".slha1");
writeSLHAfile(2,prefix+filename+".slha2");
}
}
/// PDG code translation map, for special cases where an SLHA file has been read in and the PDG codes changed.
const std::map<int, int>& Spectrum::PDG_translator() const
{
return HE->PDG_translator();
}
// The expressions in all of the following CKM functions are from the CKMFitter paper hep-ph/0406184v3.
///Helper function to calculate Wolfenstein rho+i*eta from rhobar and etabar
std::complex<double> Spectrum::rhoplusieta(double lambda, double A, double rhobar, double etabar)
{
std::complex<double> x(rhobar, etabar);
double y = pow(A*lambda*lambda,2);
return sqrt((1.0-y)/(1.0-lambda*lambda))*x/(1.0-x*y);
}
/// CKM Wolfenstein --> V_ud standard parameterisation convertor
double Spectrum::Wolf2V_ud(double l, double A, double rhobar, double etabar)
{
double norm = std::norm(rhoplusieta(l,A,rhobar,etabar));
return 1.0 - 0.5*pow(l,2) - 0.125*pow(l,4) - 0.0625*pow(l,6)*(1.0+8.0*A*A*norm)
- 0.0078125*pow(l,8)*(5.0-32.0*A*A*norm);
}
/// CKM Wolfenstein --> V_us standard parameterisation convertor
double Spectrum::Wolf2V_us(double l, double A, double rhobar, double etabar)
{
double norm = std::norm(rhoplusieta(l,A,rhobar,etabar));
return l - 0.5*A*A*pow(l,7)*norm;
}
/// CKM Wolfenstein --> V_ub standard parameterisation convertor
std::complex<double> Spectrum::Wolf2V_ub(double l, double A, double rhobar, double etabar)
{
return A*pow(l,3)*std::conj(rhoplusieta(l,A,rhobar,etabar));
}
/// CKM Wolfenstein --> V_cd standard parameterisation convertor
std::complex<double> Spectrum::Wolf2V_cd(double l, double A, double rhobar, double etabar)
{
std::complex<double> x(rhoplusieta(l,A,rhobar,etabar));
return 0.5*pow(A*l,2)*(pow(l,3)*(1.0-2.0*x) + pow(l,5)*x) - l;
}
/// CKM Wolfenstein --> V_cs standard parameterisation convertor
std::complex<double> Spectrum::Wolf2V_cs(double l, double A, double rhobar, double etabar)
{
double l2 = l*l;
double fA2 = 4.0*A*A;
return 1.0 - 0.5*l2 - 0.125*l2*l2*(1.0+fA2)
- 0.0625*pow(l2,3)*(1.0-fA2+4.0*fA2*rhoplusieta(l,A,rhobar,etabar))
- 0.0078125*pow(l2,4)*(5.0-fA2*(2.0+4.0*fA2));
}
/// CKM Wolfenstein --> V_cb standard parameterisation convertor
double Spectrum::Wolf2V_cb(double l, double A, double rhobar, double etabar)
{
return A*l*l * (1.0 - 0.5*A*A*pow(l,6)*std::norm(rhoplusieta(l,A,rhobar,etabar)));
}
/// CKM Wolfenstein --> V_td standard parameterisation convertor
std::complex<double> Spectrum::Wolf2V_td(double l, double A, double rhobar, double etabar)
{
std::complex<double> x(rhoplusieta(l,A,rhobar,etabar));
return A*l*l * (l*(1.0-x) + 0.5*pow(l,3)*x + 0.125*pow(l,5)*(1.0+4.0*A*A)*x);
}
/// CKM Wolfenstein --> V_ts standard parameterisation convertor
std::complex<double> Spectrum::Wolf2V_ts(double l, double A, double rhobar, double etabar)
{
std::complex<double> x(rhoplusieta(l,A,rhobar,etabar));
return A*l*l * (0.5*pow(l,2)*(1.0-2.0*x) + 0.125*pow(l,4) + 0.0625*pow(l,6)*(1.0+8.0*A*A*x) - 1.0);
}
/// CKM Wolfenstein --> V_tb standard parameterisation convertor
double Spectrum::Wolf2V_tb(double l, double A, double rhobar, double etabar)
{
double norm = std::norm(rhoplusieta(l,A,rhobar,etabar));
double l4 = pow(l,4);
return 1.0 - 0.5*A*A*l4 * (1.0 + l*l*norm + 0.25*A*A*l4);
}
} // end namespace Gambit
Updated on 2024-07-18 at 13:53:34 +0000