TABLE OF CONTENTS
- 1. /shadowing
- 1.1. shadowing/AeffCalc
- 1.2. shadowing/pathint
- 1.2.1. pathint/inipath
/shadowing [ Modules ]
NAME
module shadowing
PURPOSE
This module provides the calculation of shadowing for the vector meson components of a (high energetic) virtual photon: The couplings are rescaled...
(cf. Th.Falter, PhD thesis)
shadowing/AeffCalc [ Subroutines ]
[ Top ] [ shadowing ] [ Subroutines ]
NAME
subroutine AeffCalc(targetNuc,position,egamma,qsq2,shadfac)
PURPOSE
calculate shadowing factor R_V for vector meson components:
e^2/g_V^2 -> e^2/g_V^2* R_V
INPUTS
- type(tNucleus) :: targetNuc -- nucleus to consider
- real,dimension(1:3) :: position -- spatial coordinate
- real :: egamma -- energy of photon (=nu)
- real :: qsqs2 -- transfered momentum (=Q2)
OUTPUT
- real,dimension(4) :: shadfac -- the shadowing factors for rho0, omega, phi, J/psi
NOTES
- cf. PyVP[ScaleVMD]: Pythia stores the inverse of the couplings, therefore f_V^2/4pi -> f_V^2/4pi / shadfac
- cf. Th.Falter, PhD thesis, p.88ff, p117ff
- the underlying assumptions seem not to hold for small A (i.e. He): assumption (5.13) is not very important; assumption (5.11) not tested!
shadowing/pathint [ Functions ]
[ Top ] [ shadowing ] [ Functions ]
NAME
real function pathint(targetNuc,r,cost,zprime)
PURPOSE
calculates \int_{z'}^z\rho(\vec b,z'')dz'' with z=r*cos(\theta)
INPUTS
OUTPUT
- function value -- as given
pathint/inipath [ Subroutines ]
[ Top ] [ pathint ] [ Subroutines ]
NAME
subroutine inipath
PURPOSE
Initialise pathint
NOTES