reco::MustacheKernel Namespace Reference

Functions
bool	inDynamicDPhiWindow (const float seedEta, const float seedPhi, const float ClustE, const float ClusEta, const float clusPhi)
bool	inMustache (const float maxEta, const float maxPhi, const float ClustE, const float ClusEta, const float ClusPhi)

Function Documentation

bool reco::MustacheKernel::inDynamicDPhiWindow	(	const float	seedEta,
		const float	seedPhi,
		const float	ClustE,
		const float	ClusEta,
		const float	clusPhi
	)

Definition at line 73 of file Mustache.cc.

References funct::abs(), constexpr, diMuonHistograms_cfi::etaBin, Exception, create_public_lumi_plots::exp, bookConverter::max, min(), Phi_mpi_pi(), pileupReCalc_HLTpaths::scale, and create_public_lumi_plots::width.

                                      {
      // from Rishi's fits 06 June 2013 in log base 10
      constexpr double yoffsetEB = 7.151e-02;
      constexpr double scaleEB   = 5.656e-01;
      constexpr double xoffsetEB = 2.931e-01;
      constexpr double widthEB   = 2.976e-01;

      constexpr double yoffsetEE_0 =  5.058e-02;
      constexpr double scaleEE_0   =  7.131e-01;
      constexpr double xoffsetEE_0 =  1.668e-02;
      constexpr double widthEE_0   =  4.114e-01;

      constexpr double yoffsetEE_1 = -9.913e-02;
      constexpr double scaleEE_1   =  4.404e+01;
      constexpr double xoffsetEE_1 = -5.326e+00;
      constexpr double widthEE_1   =  1.184e+00;

      constexpr double yoffsetEE_2 = -6.346e-01;
      constexpr double scaleEE_2   =  1.317e+01;
      constexpr double xoffsetEE_2 = -7.037e+00;
      constexpr double widthEE_2   =  2.836e+00;
      
      
      const double absSeedEta = std::abs(seedEta);
      const int etaBin = ( (int)(absSeedEta >= 1.479) + 
               (int)(absSeedEta >= 1.75)  +
               (int)(absSeedEta >= 2.0)     );
      const double logClustEt = std::log10(ClustE/std::cosh(ClusEta));
      const double clusDphi = std::abs(TVector2::Phi_mpi_pi(seedPhi - 
                                ClusPhi));

      double yoffset, scale, xoffset, width, saturation, cutoff, maxdphi;

      switch( etaBin ) {
      case 0: // EB
    yoffset = yoffsetEB;
    scale   = scaleEB;
    xoffset = xoffsetEB;
    width   = 1.0/widthEB;
    saturation = 0.14;
    cutoff     = 0.60;
    break;
      case 1: // 1.479 -> 1.75
    yoffset = yoffsetEE_0;
    scale   = scaleEE_0;
    xoffset = xoffsetEE_0;
    width   = 1.0/widthEE_0;
    saturation = 0.14;
    cutoff     = 0.55;
    break;
      case 2: // 1.75 -> 2.0
    yoffset = yoffsetEE_1;
    scale   = scaleEE_1;
    xoffset = xoffsetEE_1;
    width   = 1.0/widthEE_1;
    saturation = 0.12;
    cutoff     = 0.45;
    break;
      case 3: // 2.0 and up
    yoffset = yoffsetEE_2;
    scale   = scaleEE_2;
    xoffset = xoffsetEE_2;
    width   = 1.0/widthEE_2;
    saturation = 0.12;
    cutoff     = 0.30;
    break;
      default:
    throw cms::Exception("InValidEtaBin")
      << "Calculated invalid eta bin = " << etaBin 
      << " in \"inDynamicDPhiWindow\"" << std::endl;
      }
      
      maxdphi = yoffset+scale/(1+std::exp((logClustEt-xoffset)*width));
      maxdphi = std::min(maxdphi,cutoff);
      maxdphi = std::max(maxdphi,saturation);
      
      return clusDphi < maxdphi;
    }

bool reco::MustacheKernel::inMustache	(	const float	maxEta,
		const float	maxPhi,
		const float	ClustE,
		const float	ClusEta,
		const float	ClusPhi
	)

Definition at line 9 of file Mustache.cc.

References constexpr, f, bookConverter::max, maxEta, min(), Phi_mpi_pi(), funct::sin(), mathSSE::sqrt(), w10, and w11.

Referenced by reco::Mustache::MustacheClust(), and reco::Mustache::MustacheID().

                                {
      //bool inMust=false;
      //float eta0 = maxEta;
      //float phi0 = maxPhi;      
      
      constexpr float p00 = -0.107537;
      constexpr float p01 = 0.590969;
      constexpr float p02 = -0.076494;
      constexpr float p10 = -0.0268843;
      constexpr float p11 = 0.147742;
      constexpr float p12 = -0.0191235;
      
      constexpr float w00 = -0.00571429;
      constexpr float w01 = -0.002;
      constexpr float w10 = 0.0135714;
      constexpr float w11 = 0.001;
      
      const float sineta0 = std::sin(maxEta);
      const float eta0xsineta0 = maxEta*sineta0;
      
      
      //2 parabolas (upper and lower) 
      //of the form: y = a*x*x + b
      
      //b comes from a fit to the width
      //and has a slight dependence on E on the upper edge    
      // this only works because of fine tuning :-D
      const float sqrt_log10_clustE = std::sqrt(std::log10(ClustE)+1.1);
      // we need to have this in two steps, so that we don't improperly shift
      // the lower bound!
      float b_upper = w10*eta0xsineta0 + w11 / sqrt_log10_clustE;      
      float b_lower = w00*eta0xsineta0 + w01 / sqrt_log10_clustE; 
      const float midpoint =  0.5*( b_upper + b_lower );
      b_upper -= midpoint;
      b_lower -= midpoint;

      //the curvature comes from a parabolic 
      //fit for many slices in eta given a 
      //slice -0.1 < log10(Et) < 0.1
      const float curv_up=eta0xsineta0*(p00*eta0xsineta0+p01)+p02;
      const float curv_low=eta0xsineta0*(p10*eta0xsineta0+p11)+p12;
      
      //solving for the curviness given the width of this particular point
      const float a_upper=(1/(4*curv_up))-fabs(b_upper);
      const float a_lower = (1/(4*curv_low))-fabs(b_lower);
      
      const double dphi=TVector2::Phi_mpi_pi(ClusPhi-maxPhi);
      const double dphi2 = dphi*dphi;
      // minimum offset is half a crystal width in either direction
      // because science.
      const float upper_cut=( std::max((1./(4.*a_upper)),0.0)*dphi2 +
                  std::max(b_upper,0.0087f) ) + 0.0087;
      const float lower_cut=( std::max((1./(4.*a_lower)),0.0)*dphi2 + 
                  std::min(b_lower,-0.0087f) );
      

      //if(deta < upper_cut && deta > lower_cut) inMust=true;
      
      const float deta=(1-2*(maxEta<0))*(ClusEta-maxEta); // sign flip deta
      return (deta < upper_cut && deta > lower_cut);
    }