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KinematicCasts.hpp
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the newest version in sPHENIX GitHub for file KinematicCasts.hpp
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// This file is part of the Acts project.
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//
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// Copyright (C) 2018-2020 CERN for the benefit of the Acts project
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//
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// This Source Code Form is subject to the terms of the Mozilla Public
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// License, v. 2.0. If a copy of the MPL was not distributed with this
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// file, You can obtain one at http://mozilla.org/MPL/2.0/.
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#pragma once
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#include <cmath>
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#include "
ActsFatras/EventData/Particle.hpp
"
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namespace
ActsFatras {
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namespace
Casts {
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struct
Vrho
{
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double
operator()
(
const
Particle
&
particle
)
const
{
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return
std::hypot(particle.
position
().x(), particle.
position
().y());
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}
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};
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struct
Vz
{
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double
operator()
(
const
Particle
&
particle
)
const
{
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return
particle.
position
().z();
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}
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};
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struct
AbsVz
{
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double
operator()
(
const
Particle
&
particle
)
const
{
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return
std::abs
(particle.
position
().z());
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}
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};
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struct
Eta
{
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double
operator()
(
const
Particle
&
particle
)
const
{
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// particle direction is always normalized, i.e. dz = pz / p
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return
std::atanh(particle.
unitDirection
().z());
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}
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};
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struct
AbsEta
{
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double
operator()
(
const
Particle
&
particle
)
const
{
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// particle direction is always normalized, i.e. dz = pz / p
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return
std::atanh(
std::abs
(particle.
unitDirection
().z()));
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}
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};
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struct
Pt
{
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double
operator()
(
const
Particle
&
particle
)
const
{
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// particle direction is always normalized, i.e. dt²+dz²=1 w/ dt²=dx²+dy²
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return
particle.
absMomentum
() * std::hypot(particle.
unitDirection
().x(),
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particle.
unitDirection
().y());
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}
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};
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struct
P
{
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double
operator()
(
const
Particle
&
particle
)
const
{
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return
particle.
absMomentum
();
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}
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};
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struct
E
{
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double
operator()
(
const
Particle
&
particle
)
const
{
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return
particle.
energy
();
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}
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};
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}
// namespace Casts
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}
// namespace ActsFatras
acts
blob
master
Fatras
include
ActsFatras
Selectors
KinematicCasts.hpp
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Jin Huang
. updated:
Wed Jun 29 2022 17:24:25
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