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diff --git a/include/RHEJ/PDG_codes.hh b/include/RHEJ/PDG_codes.hh
index b01c690..3c153e2 100644
--- a/include/RHEJ/PDG_codes.hh
+++ b/include/RHEJ/PDG_codes.hh
@@ -1,124 +1,133 @@
/** \file PDG_codes.hh
* \brief Contains the Particle IDs of all relevant SM particles.
*
* Large enumeration included which has multiple entries for potential
* alternative names of different particles. There are also functions
* which can be used to determine if a particle is a parton or if
* it is a non-gluon boson.
*/
#pragma once
namespace RHEJ {
//! particle ids according to PDG
namespace pid {
//! The possible particle identities. We use PDG IDs as standard.
enum ParticleID{
d = 1, /*!< Down Quark */
down = d, /*!< Down Quark */
u = 2, /*!< Up Quark */
up = u, /*!< Up Quark */
s = 3, /*!< Strange Quark */
strange = s, /*!< Strange Quark */
c = 4, /*!< Charm Quark */
charm = c, /*!< Charm Quark */
b = 5, /*!< Bottom Quark */
bottom = b, /*!< Bottom Quark */
t = 6, /*!< Top Quark */
top = t, /*!< Top Quark */
e = 11, /*!< Electron */
electron = e, /*!< Electron */
nu_e = 12, /*!< Electron Neutrino */
electron_neutrino = nu_e, /*!< Electron neutrino */
mu = 13, /*!< Muon */
muon = mu, /*!< Muon */
nu_mu = 14, /*!< Muon Neutrino */
muon_neutrino = nu_mu, /*!< Muon Neutrino */
tau = 15, /*!< Tau */
nu_tau = 16, /*!< Tau Neutrino */
tau_neutrino = nu_tau, /*!< Tau Neutrino */
d_bar = -d, /*!< Anti-Down Quark */
u_bar = -u, /*!< Anti-Up quark */
s_bar = -s, /*!< Anti-Strange Quark */
c_bar = -c, /*!< Anti-Charm Quark */
b_bar = -b, /*!< Anti-Bottom Quark */
t_bar = -t, /*!< Anti-Top Quark */
e_bar = -e, /*!< Positron */
nu_e_bar = -nu_e, /*!< Anti-Electron Neutrino */
mu_bar = -mu, /*!< Anti-Muon */
nu_mu_bar = -nu_mu, /*!< Anti-Muon Neutrino */
tau_bar = -tau, /*!< Anti-Tau */
nu_tau_bar = -nu_tau, /*!< Anti-Tau Neutrino */
gluon = 21, /*!< Gluon */
g = gluon, /*!< Gluon */
photon = 22, /*!< Photon */
gamma = photon, /*!< Photon */
Z = 23, /*!< Z Boson */
Wp = 24, /*!< W- Boson */
Wm = -Wp, /*!< W+ Boson */
h = 25, /*!< Higgs Boson */
Higgs = h, /*!< Higgs Boson */
higgs = h, /*!< Higgs Boson */
p = 2212, /*!< Proton */
proton = p, /*!< Proton */
p_bar = -p, /*!< Anti-Proton */
};
}
using ParticleID = pid::ParticleID;
/**
* \brief Function to determine if particle is a parton
* @param p PDG ID of particle
* @returns true if the particle is a parton, false otherwise
*/
inline
constexpr bool is_parton(ParticleID p){
return p == pid::gluon || std::abs(p) <= pid::top;
}
/**
* \brief function to determine if the particle is a photon, W, Z, or Higgs boson
* @param id PDG ID of particle
* @returns true if the partice is a A,W,Z, or H, false otherwise
*/
inline
constexpr bool is_AWZH_boson(ParticleID id){
return id == pid::Wm || (id >= pid::photon && id <= pid::Higgs);
}
/**
- * \brief Function to determine if particle is a parton
- * @param p PDG ID of particle
+ * \brief Function to determine if particle is a quark
+ * @param id PDG ID of particle
* @returns true if the particle is a qaurk, false otherwise
*/
inline
- constexpr bool is_quark(ParticleID p){
- return (p >= pid::down && p <= pid::top);
+ constexpr bool is_quark(ParticleID id){
+ return (id >= pid::down && id <= pid::top);
}
/**
- * \brief Function to determine if particle is a parton
- * @param p PDG ID of particle
+ * \brief Function to determine if particle is a antiquark
+ * @param id PDG ID of particle
* @returns true if the particle is an antiquark, false otherwise
*/
inline
- constexpr bool is_antiquark(ParticleID p){
- return (p <= pid::d_bar && p >= pid::t_bar);
+ constexpr bool is_antiquark(ParticleID id){
+ return (id <= pid::d_bar && id >= pid::t_bar);
}
+ /**
+ * \brief Function to determine if particle is a (anti-)quark
+ * @param id PDG ID of particle
+ * @returns true if the particle is a quark or antiquark, false otherwise
+ */
+ inline
+ constexpr bool is_anyquark(ParticleID id){
+ return (id && id >= pid::t_bar && id <= pid::t);
+ }
/**
* \brief function to determine if the particle is a photon, W or Z
* @param id PDG ID of particle
* @returns true if the partice is a A,W,Z, or H, false otherwise
*/
inline
constexpr bool is_AWZ_boson(ParticleID id){
return id == pid::Wm || (id >= pid::photon && id <= pid::Wp);
}
}
diff --git a/include/RHEJ/utility.hh b/include/RHEJ/utility.hh
index 4e44556..440af2f 100644
--- a/include/RHEJ/utility.hh
+++ b/include/RHEJ/utility.hh
@@ -1,215 +1,221 @@
/**
* \file
* \brief Contains various utilities
*/
#pragma once
#include <algorithm>
#include <cassert>
#include <boost/core/demangle.hpp>
// FastJet Includes
#include "fastjet/PseudoJet.hh"
#include "fastjet/ClusterSequence.hh"
#include "RHEJ/PDG_codes.hh"
namespace RHEJ{
//! Class representing a particle
struct Particle {
//! particle type
ParticleID type;
//! particle momentum
fastjet::PseudoJet p;
//! get rapidity
double rapidity() const{
return p.rapidity();
}
//! get transverse momentum
double perp() const{
return p.perp();
}
//! get momentum in x direction
double px() const{
return p.px();
}
//! get momentum in y direction
double py() const{
return p.py();
}
//! get momentum in z direction
double pz() const{
return p.pz();
}
//! get energy
double E() const{
return p.E();
}
//! get mass
double m() const{
return p.m();
}
};
//! Functor to compare rapidities
/**
* This can be used whenever a rapidity comparison function is needed,
* for example in many standard library functions.
*
* @see pz_less
*/
struct rapidity_less{
template<class FourVector>
bool operator()(FourVector const & p1, FourVector const & p2){
return p1.rapidity() < p2.rapidity();
}
};
//! Functor to compare momenta in z direction
/**
* This can be used whenever a pz comparison function is needed,
* for example in many standard library functions.
*
* @see rapidity_less
*/
struct pz_less{
template<class FourVector>
bool operator()(FourVector const & p1, FourVector const & p2){
return p1.pz() < p2.pz();
}
};
//! Convert a vector of Particles to a vector of particle momenta
inline
std::vector<fastjet::PseudoJet> to_PseudoJet(
std::vector<Particle> const & v
){
std::vector<fastjet::PseudoJet> result;
for(auto && sp: v) result.emplace_back(sp.p);
return result;
}
//! Check if a particle is a parton, i.e. quark, antiquark, or gluon
inline
bool is_parton(Particle const & p){
return is_parton(p.type);
}
//! Check if a particle is a quark
inline
bool is_quark(Particle const & p){
return is_quark(p.type);
}
//! Check if a particle is an anti-quark
inline
bool is_antiquark(Particle const & p){
return is_antiquark(p.type);
}
+ //! Check if a particle is a quark or anit-quark
+ inline
+ bool is_anyquark(Particle const & p){
+ return is_anyquark(p.type);
+ }
+
//! Check if a particle is a photon, W or Z boson
inline bool is_AWZ_boson(Particle const & particle){
return is_AWZ_boson(particle.type);
}
//! Check if a particle is a photon, W, Z, or Higgs boson
inline bool is_AWZH_boson(Particle const & particle){
return is_AWZH_boson(particle.type);
}
//! Extract all partons from a vector of particles
inline
std::vector<Particle> filter_partons(
std::vector<Particle> const & v
){
std::vector<Particle> result;
result.reserve(v.size());
std::copy_if(
begin(v), end(v), std::back_inserter(result),
[](Particle const & p){ return is_parton(p); }
);
return result;
}
//! Create a std::unique_ptr to a T object
/**
* For non-array types this works like std::make_unique,
* which is not available under C++11
*/
template<class T, class... Args>
std::unique_ptr<T> make_unique(Args&&... a){
return std::unique_ptr<T>{new T{std::forward<Args>(a)...}};
}
//! Create an array containing the passed arguments
template<typename T, typename... U>
constexpr
std::array<T, 1 + sizeof...(U)> make_array(T t, U&&... rest){
return {{t, std::forward<U>(rest)...}};
}
inline
std::string join(
std::string const & /* delim */, std::string const & str
){
return str;
}
//! Join strings with a delimiter
/**
* @param delim Delimiter to be put between consecutive strings
* @param first First string
* @param second Second string
* @param rest Remaining strings
*/
template<typename... Strings>
std::string join(
std::string const & delim,
std::string const & first, std::string const & second,
Strings&&... rest
){
return join(delim, first + delim + second, std::forward<Strings>(rest)...);
}
//! Return the name of the argument's type
template<typename T>
std::string type_string(T&&){
return boost::core::demangle(typeid(T).name());
}
//! Eliminate compiler warnings for unused variables
template<typename... T>
constexpr void ignore(T&&...) {}
//! Check whether two doubles are closer than ep > 0 to each other
inline
bool nearby_ep(double a, double b, double ep){
assert(ep > 0);
return std::abs(a-b) < ep;
}
//! Check whether all components of two PseudoJets are closer than ep to each other
inline
bool nearby_ep(
fastjet::PseudoJet const & pa, fastjet::PseudoJet const & pb,
double ep
){
assert(ep > 0);
for(size_t i = 0; i < 4; ++i){
if(!nearby_ep(pa[i], pb[i], ep)) return false;
}
return true;
}
inline
bool nearby(
fastjet::PseudoJet const & pa, fastjet::PseudoJet const & pb, double const norm = 1.
){
return nearby_ep(pa, pb, 1e-7*norm);
}
}

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