CbmTrddEdxUtils.cxx

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/* Copyright (C) 2021 Goethe-University Frankfurt, Frankfurt
   SPDX-License-Identifier: GPL-3.0-only
   Authors: Pascal Raisig [committer] */
 
#include "CbmTrddEdxUtils.h"
 
#include <RtypesCore.h>
 
#include <iostream>  // for cout
 
#include <cmath>  // for Sqrt/Pow/Log
 
CbmTrddEdxUtils::CbmTrddEdxUtils() {}
CbmTrddEdxUtils::~CbmTrddEdxUtils() {}
 
// ---- GetMipNormedBB ----
Double_t CbmTrddEdxUtils::GetMipNormedBB(Double_t betaGamma)
{
  const Double_t beta = betaGamma / std::sqrt(1. + betaGamma * betaGamma);
 
  Double_t nominator = (4.4 - std::pow(beta, 2.26) - std::log(0.004 + 1 / std::pow(betaGamma, 0.95)));
 
  Double_t denominator = std::pow(beta, 2.26);
 
  Double_t bb = 0.2 * nominator / denominator;
 
  return bb;
}
 
ClassImp(CbmTrddEdxUtils)