P4Helpers.h File Reference

#include <cmath>
#include "CxxUtils/fpcompare.h"
#include <algorithm>
#include <limits>
#include "EventKernel/I4Momentum.h"

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Namespaces
namespace	P4Helpers
	P4Helpers provides static helper functions for kinematic calculation on objects deriving from I4Momentum.

Functions
double	P4Helpers::deltaPhi (double phiA, double phiB)
	delta Phi in range [-pi,pi[
template<class Iterator_t, class Predicate_t>
void	P4Helpers::sort (Iterator_t itr, Iterator_t itrEnd, Predicate_t p)
	sort a container according to the given predicate
template<class Container_t, class Predicate_t>
void	P4Helpers::sort (Container_t &container, Predicate_t p)
	sort a container according to the given predicate
double	P4Helpers::deltaEta (const I4Momentum &p1, const I4Momentum &p2)
	Computes efficiently \( \Delta{\eta} \).
double	P4Helpers::deltaEtaSq (const I4Momentum &p1, const I4Momentum &p2)
	Computes efficiently \( \Delta{\eta}^2 \).
double	P4Helpers::deltaEta (const I4Momentum *const p1, const I4Momentum *const p2)
	Computes efficiently \( \Delta{\eta} \), pointer args.
double	P4Helpers::deltaPhi (const I4Momentum &p4, const double phi)
	delta Phi in range [-pi,pi[ from one I4momentum reference
double	P4Helpers::deltaPhi (const I4Momentum &pA, const I4Momentum &pB)
	delta Phi in range [-pi,pi[ from two I4momentum references
double	P4Helpers::deltaPhiSq (const I4Momentum &pA, const I4Momentum &pB)
	delta Phi squared in range ([-pi,pi[)^2 from two I4momentum references
double	P4Helpers::deltaPhi (const I4Momentum *const pA, const I4Momentum *const pB)
	delta Phi in range [-pi,pi[ from two I4momentum pointers
double	P4Helpers::deltaR (const I4Momentum &p4, double eta, double phi)
	\( \Delta{R} \) from 1 I4Momentum
double	P4Helpers::deltaR (const I4Momentum &pA, const I4Momentum &pB)
	delta R from two I4momentum reference
double	P4Helpers::deltaR (const I4Momentum *const pA, const I4Momentum *const pB)
	delta R from two I4momentum pointers
bool	P4Helpers::isInDeltaR (const I4Momentum &p1, const I4Momentum &p2, double dR)
	Check if 2 I4Momentum are in a \( \Delta{R} \) cone.
double	P4Helpers::invMass (const I4Momentum &pA, const I4Momentum &pB)
	invariant mass from two I4momentum references
double	P4Helpers::invMass (const I4Momentum *const pA, const I4Momentum *const pB)
	invariant mass from two I4momentum pointers
double	P4Helpers::invMass (const I4Momentum &pA, const I4Momentum &pB, const I4Momentum &pC, const I4Momentum &pD)
	invariant mass from four I4momentum references
double	P4Helpers::invMass (const I4Momentum *const pA, const I4Momentum *const pB, const I4Momentum *const pC, const I4Momentum *const pD)
	invariant mass from four I4momentum pointers