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FourMom
src
EigenP4JacobianEEtaPhiM2PtEtaPhiM.cxx
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/*
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Copyright (C) 2002-2017 CERN for the benefit of the ATLAS collaboration
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*/
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#include "
FourMom/EigenP4JacobianEEtaPhiM2PtEtaPhiM.h
"
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#include <cmath>
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#include <algorithm>
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EigenP4JacobianEEtaPhiM2PtEtaPhiM::EigenP4JacobianEEtaPhiM2PtEtaPhiM
(
double
E
,
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double
eta
,
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double
M) :
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AmgMatrix
(4,4)()
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{
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double
t
=
std::exp
(-
eta
);
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double
P = std::sqrt(
std::max
( 0.,
E
*
E
- M*M));
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double
u
= 1+
t
*
t
;
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double
cosTheta = (1-
t
*
t
)/
u
;
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double
sinTheta = 2*
t
/
u
;
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this->setZero();
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(*this)(0,0) =
E
/P * sinTheta;
// dPt/dE
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(*this)(0,1) = -P * cosTheta*sinTheta;
// dPt/deta
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(*this)(0,3) = -M/P * sinTheta;
// dPt/dM
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(*this)(1,1) = 1;
// deta/deta
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(*this)(2,2) = 1;
// dphi/dphi
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(*this)(3,3) = 1;
// dM/dM
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}
EigenP4JacobianEEtaPhiM2PtEtaPhiM::EigenP4JacobianEEtaPhiM2PtEtaPhiM
EigenP4JacobianEEtaPhiM2PtEtaPhiM(double E, double eta, double M)
Definition:
EigenP4JacobianEEtaPhiM2PtEtaPhiM.cxx:10
max
#define max(a, b)
Definition:
cfImp.cxx:41
eta
Scalar eta() const
pseudorapidity method
Definition:
AmgMatrixBasePlugin.h:79
read_hist_ntuple.t
t
Definition:
read_hist_ntuple.py:5
drawFromPickle.exp
exp
Definition:
drawFromPickle.py:36
Trk::u
@ u
Enums for curvilinear frames.
Definition:
ParamDefs.h:83
AmgMatrix
#define AmgMatrix(rows, cols)
Definition:
EventPrimitives.h:51
EigenP4JacobianEEtaPhiM2PtEtaPhiM.h
VP1PartSpect::E
@ E
Definition:
VP1PartSpectFlags.h:21
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