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PYTHIA
8.312
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#include <SigmaTotal.h>
Public Member Functions | |
| SigmaRPP () | |
| Constructor. | |
| virtual void | init (Info *infoPtrIn) |
| Initialize data members. | |
| virtual bool | calcTotEl (int idAin, int idBin, double sIn, double, double) |
| Calculate integrated total/elastic cross sections. More... | |
| virtual double | dsigmaEl (double t, bool useCoulomb=false, bool=false) |
| Differential elastic cross section. | |
 Public Member Functions inherited from SigmaTotAux | |
| SigmaTotAux () | |
| Constructor. | |
| virtual | ~SigmaTotAux () |
| Destructor. | |
| virtual bool | calcTot (int, int, double) |
| Calculate total cros section only. Only implemented for SigmaSaSDL. | |
| virtual bool | calcDiff (int, int, double, double, double) |
| virtual double | dsigmaSD (double, double, bool=true, int=0) |
| virtual bool | splitDiff () |
| Possibility to separate xi and t choices for diffraction. | |
| virtual double | dsigmaDD (double, double, double, int=0) |
| virtual double | dsigmaCD (double, double, double, double, int) |
| virtual double | mMinCD () |
| Minimal central diffractive mass. | |
| pair< double, double > | tRange (double sIn, double s1In, double s2In, double s3In, double s4In) |
| bool | tInRange (double tIn, double sIn, double s1In, double s2In, double s3In, double s4In) |
| double | pFormFac (double tIn) |
| Commonly used proton form factor. | |
Additional Inherited Members | |
| Public Attributes inherited from SigmaTotAux | |
| bool | isExpEl |
| Store total and elastic cross section properties. | |
| bool | hasCou |
| double | sigTot |
| double | rhoOwn |
| double | sigEl |
| double | bEl |
| double | sigTotCou |
| double | sigElCou |
| double | sigXB |
| Store diffractive cross sections. Possibly also sigmaND. | |
| double | sigAX |
| double | sigXX |
| double | sigAXB |
| double | sigNDtmp |
| Protected Member Functions inherited from SigmaTotAux | |
| virtual bool | initCoulomb (Settings &settings, ParticleData *particleDataPtrIn) |
| Initialize Coulomb correction parameters. More... | |
| virtual bool | addCoulomb () |
| Add Coulomb corrections to the elastic and total cross sections. More... | |
| virtual double | dsigmaElCoulomb (double t) |
| Coulomb contribution to the differential elastic cross sections. More... | |
| Protected Attributes inherited from SigmaTotAux | |
| int | idA |
| Initialization data, normally only set once. | |
| int | idB |
| bool | tryCoulomb |
| Add Coulomb corrections to the elastic cross section. | |
| double | chgSgn |
| double | tAbsMin |
| double | lambda |
| double | phaseCst |
| ParticleData * | particleDataPtr |
| Pointer to the particle data table. | |
| Rndm * | rndmPtr |
| Pointer to the random number generator. | |
| Static Protected Attributes inherited from SigmaTotAux | |
| static const int | NPOINTS = 1000 |
| Constants: could only be changed in the code itself. More... | |
| static const double | ALPHAEM = 0.00729353 |
| alpha_em(0). More... | |
| static const double | CONVERTEL = 0.0510925 |
| Conversion coefficients = 1/(16pi) * (mb <-> GeV^2). | |
| static const double | MPROTON = 0.9382720 |
| Proton and pion masses, and their squares. Euler's constant. | |
| static const double | SPROTON = 0.8803544 |
| static const double | MPION = 0.1349766 |
| static const double | SPION = 0.0182187 |
| static const double | GAMMAEUL = 0.577215665 |
| static const double | TABSREF = 2e-3 |
| Reference scale for nominal definition of t slope. | |
| static const double | TABSMAX = 1. |
| static const double | MINSLOPEEL = 10. |
The SigmaRPP class parametrizes total and elastic cross sections according to the fit in Review of Particle Physics 2014.
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virtual |
Calculate integrated total/elastic cross sections.
Calculate total and (integrated) elastic cross sections.
Find appropriate combination of incoming beams.
Total cross section and the rho parameter.
Total elastic cross section, by integration in exp( MINSLOPEEL * t).
Approximate exponential slope.
Done if no Coulomb corrections.
Reduce hadronic part of elastic cross section by tMin cut.
Loop through t range according to dt/t^2.
Evaluate cross section difference between with and without Coulomb.
Include common factors to give new elastic and total cross sections.
Done.
Reimplemented from SigmaTotAux.
1.8.11
