DataFormats
ProtonReco
src
ForwardProton.cc
Go to the documentation of this file.
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/****************************************************************************
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* Authors:
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* Jan Kašpar
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* Laurent Forthomme
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****************************************************************************/
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#include "
DataFormats/ProtonReco/interface/ForwardProton.h
"
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#include <set>
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using namespace
reco
;
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ForwardProton::ForwardProton
()
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: time_(0.),
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time_err_(0.),
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xi_(0.),
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chi2_(0.),
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ndof_(0),
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valid_fit_(
false
),
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method_(
ReconstructionMethod
::
invalid
) {}
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ForwardProton::ForwardProton
(
double
chi2
,
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double
ndof
,
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const
Point
&
vtx
,
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const
Vector
& momentum,
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float
xi
,
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const
CovarianceMatrix
& cov,
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ReconstructionMethod
method
,
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const
CTPPSLocalTrackLiteRefVector
& local_tracks,
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bool
valid
,
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const
float
time
,
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const
float
time_err)
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: vertex_(
vtx
),
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momentum_(momentum),
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time_(
time
),
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time_err_(time_err),
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xi_(
xi
),
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covariance_(cov),
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chi2_(
chi2
),
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ndof_(
ndof
),
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valid_fit_(
valid
),
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method_(
method
),
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contributing_local_tracks_(local_tracks) {}
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float
ForwardProton::calculateT
(
double
beam_mom,
double
proton_mom,
double
theta
) {
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const
double
t0
= 2. * (
massSquared_
+ beam_mom * proton_mom -
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sqrt
((
massSquared_
+ beam_mom * beam_mom) * (
massSquared_
+ proton_mom * proton_mom)));
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const
double
S
=
sin
(
theta
/ 2.);
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return
t0
- 4. * beam_mom * proton_mom *
S
*
S
;
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}
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float
ForwardProton::t
()
const
{
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const
double
beam_mom =
p
() / (1. -
xi
());
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const
double
theta
= std::hypot(
thetaX
(),
thetaY
());
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return
calculateT
(beam_mom,
p
(),
theta
);
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}
funct::false
false
Definition:
Factorize.h:34
reco::ForwardProton::thetaY
float thetaY() const
horizontal scattering angle, in rad
Definition:
ForwardProton.h:89
AlcaSiPixelAliHarvester0T_cff.method
method
Definition:
AlcaSiPixelAliHarvester0T_cff.py:41
hybridSuperClusters_cfi.xi
xi
Definition:
hybridSuperClusters_cfi.py:10
CovarianceMatrix
Definition:
CovarianceMatrix.h:27
edm::RefVector< CTPPSLocalTrackLiteCollection >
reco
fixed size matrix
Definition:
AlignmentAlgorithmBase.h:45
hltPixelTracks_cff.chi2
chi2
Definition:
hltPixelTracks_cff.py:25
CTPPSpixelLocalTrackReconstructionInfo::invalid
validateGeometry_cfg.valid
valid
Definition:
validateGeometry_cfg.py:21
funct::sin
Sin< T >::type sin(const T &t)
Definition:
Sin.h:22
ndof
Definition:
HIMultiTrackSelector.h:49
reco::ForwardProton::ForwardProton
ForwardProton()
default constructor
Definition:
ForwardProton.cc:12
FrontierCondition_GT_autoExpress_cfi.t0
t0
Definition:
FrontierCondition_GT_autoExpress_cfi.py:148
mathSSE::sqrt
T sqrt(T t)
Definition:
SSEVec.h:19
theta
Geom::Theta< T > theta() const
Definition:
Basic3DVectorLD.h:150
badGlobalMuonTaggersAOD_cff.vtx
vtx
Definition:
badGlobalMuonTaggersAOD_cff.py:5
S
double S(const TLorentzVector &, const TLorentzVector &)
Definition:
Particle.cc:97
Point
Structure Point Contains parameters of Gaussian fits to DMRs.
Definition:
DMRtrends.cc:57
reco::ForwardProton::ReconstructionMethod
ReconstructionMethod
type of reconstruction applied for this track
Definition:
ForwardProton.h:38
ForwardProton.h
reco::ForwardProton::xi
float xi() const
longitudinal fractional momentum loss
Definition:
ForwardProton.h:85
reco::ForwardProton::calculateT
static float calculateT(double beam_mom, double proton_mom, double theta)
compute the squared four-momentum transfer from incident and scattered momenta, and angular informati...
Definition:
ForwardProton.cc:44
reco::ForwardProton::thetaX
float thetaX() const
vertical scattering angle, in rad
Definition:
ForwardProton.h:87
S
Definition:
CSCDBL1TPParametersExtended.h:16
reco::ForwardProton::p
float p() const
scalar norm of fitted track momentum
Definition:
ForwardProton.h:67
reco::ForwardProton::Vector
math::XYZVectorF Vector
spatial vector
Definition:
ForwardProton.h:34
reco::ForwardProton::t
float t() const
four-momentum transfer squared, in GeV^2
Definition:
ForwardProton.cc:51
ntuplemaker.time
time
Definition:
ntuplemaker.py:310
reco::ForwardProton::massSquared_
static constexpr float massSquared_
proton mass squared, GeV^2
Definition:
ForwardProton.h:151
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