OrthogonalTrackSeedingConfig.h

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// Created by Dmitry Romanov
// Subject to the terms in the LICENSE file found in the top-level directory.
//
 
#pragma once
 
#include <cstddef>
 
#include <Acts/Definitions/Units.hpp>
 
namespace eicrecon {
 
struct OrthogonalTrackSeedingConfig {
 
  float rMax = 440. * Acts::UnitConstants::mm;   // max r to look for hits to compose seeds
  float rMin = 33. * Acts::UnitConstants::mm;    // min r to look for hits to compose seeds
  float zMax = 1700. * Acts::UnitConstants::mm;  // max z to look for hits to compose seeds
  float zMin = -1500. * Acts::UnitConstants::mm; // min z to look for hits to compose seeds
  float deltaRMinTopSP =
      10. * Acts::UnitConstants::mm; // Min distance in r between middle and top SP in one seed
  float deltaRMaxTopSP =
      450. * Acts::UnitConstants::mm; // Max distance in r between middle and top SP in one seed
  float deltaRMinBottomSP =
      10. * Acts::UnitConstants::mm; // Min distance in r between middle and bottom SP in one seed
  float deltaRMaxBottomSP =
      200. * Acts::UnitConstants::mm; // Max distance in r between middle and bottom SP in one seed
  float collisionRegionMin = -250 * Acts::UnitConstants::mm; // Min z for primary vertex
  float collisionRegionMax = 250 * Acts::UnitConstants::mm;  // Max z for primary vertex
 
  unsigned int maxSeedsPerSpM = 0; // max number of seeds a single middle sp can belong to - 1
  float cotThetaMax =
      1.0 / tan(2. * atan(exp(-4.0))); // Cotangent of max theta angle (based on eta)
 
  float sigmaScattering  = 5;   // How many standard devs of scattering angles to consider
  float radLengthPerSeed = 0.1; // Average radiation lengths of material on the length of a seed
  float minPt            = (100. * Acts::UnitConstants::MeV) /
                           cotThetaMax; // MeV (in Acts units of GeV) - minimum transverse momentum
  float bFieldInZ =
      1.7 * Acts::UnitConstants::T; // T (in Acts units of GeV/[e*mm]) - Magnetic field strength
  float beamPosX  = 0;              // x offset for beam position
  float beamPosY  = 0;              // y offset for beam position
  float impactMax = 3. * Acts::UnitConstants::mm; // Maximum transverse PCA allowed
  float rMinMiddle =
      20. * Acts::UnitConstants::mm; // Middle spacepoint must fall between these two radii
  float rMaxMiddle = 400. * Acts::UnitConstants::mm;
 
  float deltaPhiMax = 0.085; // Max difference in phi between middle and either top or bottom sp
 
 
  float maxSeedsPerSpM_filter = 0; // max number of seeds a single middle sp can belong to - 1
  float deltaRMin             = 5 * Acts::UnitConstants::mm;
  bool seedConfirmation       = false;
  float deltaInvHelixDiameter = 0.00003 * 1. / Acts::UnitConstants::mm;
  float impactWeightFactor    = 1.;
  float zOriginWeightFactor   = 1.;
  float compatSeedWeight      = 200.;
  std::size_t compatSeedLimit = 2;
  float seedWeightIncrement   = 0;
 
  float zMinSeedConfCentral            = -250 * Acts::UnitConstants::mm;
  float zMaxSeedConfCentral            = 250 * Acts::UnitConstants::mm;
  float rMaxSeedConfCentral            = 140 * Acts::UnitConstants::mm;
  std::size_t nTopForLargeRCentral     = 1;
  std::size_t nTopForSmallRCentral     = 2;
  float seedConfMinBottomRadiusCentral = 60.0 * Acts::UnitConstants::mm;
  float seedConfMaxZOriginCentral      = 150.0 * Acts::UnitConstants::mm;
  float minImpactSeedConfCentral       = 1.0 * Acts::UnitConstants::mm;
 
  float zMinSeedConfForward            = -3000 * Acts::UnitConstants::mm;
  float zMaxSeedConfForward            = 3000 * Acts::UnitConstants::mm;
  float rMaxSeedConfForward            = 140 * Acts::UnitConstants::mm;
  std::size_t nTopForLargeRForward     = 1;
  std::size_t nTopForSmallRForward     = 2;
  float seedConfMinBottomRadiusForward = 60.0 * Acts::UnitConstants::mm;
  float seedConfMaxZOriginForward      = 150.0 * Acts::UnitConstants::mm;
  float minImpactSeedConfForward       = 1.0 * Acts::UnitConstants::mm;
 
  float locaError   = 1.5 * Acts::UnitConstants::mm;    //Error on Loc a
  float locbError   = 1.5 * Acts::UnitConstants::mm;    //Error on Loc b
  float phiError    = 0.02 * Acts::UnitConstants::rad;  //Error on phi
  float thetaError  = 0.002 * Acts::UnitConstants::rad; //Error on theta
  float qOverPError = 0.025 / Acts::UnitConstants::GeV; //Error on q over p
  float timeError   = 0.1 * Acts::UnitConstants::mm;    //Error on time
  // Note: Acts native time units are mm: https://acts.readthedocs.io/en/latest/core/definitions/units.html
};
} // namespace eicrecon