ParticleSmearing.hpp

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// This file is part of the Acts project.
//
// Copyright (C) 2019 CERN for the benefit of the Acts project
//
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this
// file, You can obtain one at http://mozilla.org/MPL/2.0/.

#pragma once

#include <limits>
#include <string>

#include "ACTFW/Framework/BareAlgorithm.hpp"
#include "ACTFW/Framework/RandomNumbers.hpp"
#include "Acts/Utilities/Units.hpp"

namespace FW {

class ParticleSmearing final : public BareAlgorithm {
 public:
  struct Config {
    std::string inputParticles;
    std::string outputTrackParameters;
    double sigmaD0 = 30 * Acts::UnitConstants::um;
    double sigmaD0PtA = 0 * Acts::UnitConstants::um;
    double sigmaD0PtB = 1 / Acts::UnitConstants::GeV;
    double sigmaZ0 = 30 * Acts::UnitConstants::um;
    double sigmaZ0PtA = 0 * Acts::UnitConstants::um;
    double sigmaZ0PtB = 1 / Acts::UnitConstants::GeV;
    double sigmaT0 = 5 * Acts::UnitConstants::ns;
    double sigmaPhi = 1 * Acts::UnitConstants::degree;
    double sigmaTheta = 1 * Acts::UnitConstants::degree;
    double sigmaPRel = 0.001;
    std::shared_ptr<RandomNumbers> randomNumbers = nullptr;
  };

  ParticleSmearing(const Config& cfg, Acts::Logging::Level lvl);

  ProcessCode execute(const AlgorithmContext& ctx) const final override;

 private:
  Config m_cfg;
};

}  // namespace FW